This article lists characters in the various canonical incarnations of Star Trek. This includes fictional main and major characters created for the franchise.
| Character | Actor(s) | Appearances | Rank | Posting | Position | Species | |
|---|---|---|---|---|---|---|---|
| Airiam | Sara Mitich | Seasons 1–2 (DSC) | Lt. Commander | USS Discovery | Science officer | Human cyborg | |
| Hannah Cheesman | |||||||
| Jonathan Archer | Scott Bakula | Seasons 1–4 (ENT) | Captain | Enterprise NX-01 | Commanding officer | Human | |
| Asencia | Jameela Jamil | Seasons 1-2 (PRO) | Civilian Ensign | Solum USS Dauntless | Tyrant Navigator | Vau N’Akat | |
| Soji Asha | Isa Briones | Seasons 1-2 (PIC) | Civilian | Romulan Reclamation Site | Anthropologist | Android | |
| Ayala | Tarik Ergin | Seasons 1–7 (VOY) | Lieutenant, JG (provisional) | USS Voyager | Helmsman (S7) Security officer (S1-7) Maquis (previous) | Human | |
| Azan | Kurt Wetherill | Seasons 6–7 (VOY) | Civilian | USS Voyager Passenger | Wysanti/xB | ||
| Reginald Barclay | Seasons 3–4,6–7 (TNG) Movies (FCT) Seasons 2,6–7 (VOY) | Lt. Commander (VOY) Lieutenant, JG (TNG, FCT) | Starfleet Command (VOY) USS Enterprise-E (FCT) USS Enterprise-D (TNG) | Pathfinder Project (VOY) Engineering officer (TNG, movies) | Human | ||
| Bareil Antos | Philip Anglim | Seasons 1–3,6 (DS9) | Vedek | Bajor resident | Bajoran religious leader (S1-3) | Bajoran | |
| Julian Bashir | Alexander Siddig | Seasons 1–7 (DS9) Season 6 (TNG) | Lieutenant (S4-7) Lieutenant, JG (S1-3) | Deep Space 9 | Chief medical officer | Human | |
| B'Etor | Gwynyth Walsh | Seasons 4–5,7 (TNG) Movies (GEN) Season 1 (DS9) | Commander, Klingon Empire | Bird of Prey | First officer | Klingon | |
| Brad Boimler | Jack Quaid | Seasons 1-5 (LOW) Season 2 (SNW) (Those Old Scientists) | Ensign (Seasons 1-3) Lieutenant, JG (Season 4) | USS Cerritos (Seasons 1-4), USS Titan (Season 2) | Human | ||
| Cleveland "Book" Booker | David Ajala | Seasons 3-5 (DSC) | Civilian | USS Discovery 1031-A | Courier, Starfleet consultant | Kwejian | |
| Boothby | Ray Walston | Season 5 (TNG) Season 5 (VOY) | Civilian | Starfleet Academy | Groundskeeper | Human | |
| Borg Queen | Alice Krige | Seasons 5–7 (VOY) Movies (FCT) Season 2 (PIC) | None | Borg Collective | Leader of Borg Collective | Borg | |
| Susanna Thompson | |||||||
| Annie Wersching | |||||||
| Phillip Boyce | John Hoyt | "The Cage" | Lt. Commander | USS Enterprise | Chief medical officer | Human | |
| Brunt | Jeffrey Combs | Seasons 3–7 (DS9) | Civilian | Ferenginar resident | Ferengi commerce liquidator | Ferengi | |
| Ronald Altman Bryce | Ronnie Rowe Jr. | Seasons 1–3 (DSC) | Lieutenant Commander (DSC S4) Lieutenant, JG | USS Curie (DSC S4) USS Discovery | Communications officer | Human | |
| Gabrielle Burnham | Sonja Sohn | Seasons 2-3 (DSC) | None | Section 31 | Intelligence operative Astrophysicist | Human | |
| Michael Burnham | Sonequa Martin-Green | Seasons 1–5 (DSC) | Captain (S4-5) Commander (S1-3 Crewman (S1) | USS Discovery (S1-2) USS Shenzhou (S1) | Captain (S4-5) First officer (S3) Science officer (S2) Science specialist (S1) First officer (S1) | Human | |
| Arista Arhin (as a child) | |||||||
| Joseph Carey | Josh Clark | Seasons 1,5–7 (VOY) | Lieutenant | USS Voyager | Engineering officer | Human | |
| Chakotay | Robert Beltran | Seasons 1-2 (PRO) Seasons 1–7 (VOY) | Captain Commander (provisional) | USS Protostar (PRO S1) USS Voyager S1-7 | Captain (PRO S1) First officer (VOY S1-7) Maquis (S1) | Human | |
| Christine Chapel | Majel Barrett | Seasons 1–3 (TOS) Seasons 1–2 (TAS) Movies (TMP, TVH) | Commander (TMP, TVH) Crewman (TOS, TAS) | Starfleet Command (TVH) USS Enterprise (TOS, TAS, TMP) | Starfleet Command officer (TVH) Medical officer (TMP) Nurse (TOS, TAS) | Human | |
| Jess Bush | Seasons 1-2 (SNW) | Crewman (SNW) | USS Enterprise (SNW) | Nurse (SNW) | |||
| Pavel Chekov | Walter Koenig | Seasons 2–3 (TOS) Movies (TMP, WOK, SFS, TVH, TFF, TUC, GEN) Season 5 (DS9) | Commander (WOK, SFS, TVH, TFF, TUC, GEN) Lieutenant (TMP) | USS Enterprise-A (TVH, TFF, TUC) USS Reliant (WOK) USS Enterprise (TOS, TMP, SFS) | Chief security officer (SFS, TVH, TFF, TUC) First officer (WOK) Weapons officer (TMP) Navigator (TOS) | Human | |
| Anton Yelchin | ST09, STID, STB | Ensign (ST09, STID, STB) | USS Enterprise (ST09, STID, STB) | Navigator (ST09, STID, STB) | |||
| Una Chin-Riley ('Number One') | Majel Barrett | "The Cage" Season 2 (DSC) Seasons 1-2 (SNW) | Commander Lt. Commander | USS Enterprise | First officer | Illyrian | |
| Rebecca Romijn | |||||||
| J. M. Colt | Laurel Goodwin | "The Cage" | Yeoman | USS Enterprise | Yeoman | Human | |
| Katrina Cornwell | Jayne Brook | Seasons 1-2 (DSC) | Vice Admiral | Starfleet Command | Admiral of Starfleet | Human | |
| Kimara Cretak | Adrienne Barbeau | Season 7 (DS9) | Senator | Deep Space 9 | Romulan representative | Romulan | |
| Megan Cole | |||||||
| Beverly Crusher | Gates McFadden | Seasons 1,3–7 (TNG) Movies (GEN, FCT, INS, NEM) Season 2 (PRO) Season 3 (PIC) | Admiral Civilian Commander | Starfleet Command SS Eleos XII USS Enterprise-E (FCT, INS, NEM) USS Enterprise-D (S1,3-7, GEN) Starfleet Command (S2) | Head of Starfleet Medical (PIC S5) Civilian doctor associated with the humanitarian organization Mariposas (PIC S5, LOW S4) Chief medical officer (S1, 3–7, movies) Head of Starfleet Medical (S2) | Human | |
| Jack Crusher | Ed Speleers | Season 3 (PIC) Season 2 (PRO) | Ensign Civilian | USS Enterprise NCC-1701-G SS Eleos XII | Special counselor to the captain Civilian associated with the humanitarian organization Mariposas | Human | |
| Wesley Crusher | Seasons 1–4,5,7 (TNG) Season 2 (PRO) Season 2 (PIC S2) Movies (NEM) | Civilian (PIC S2), (PRO S2) Lieutenant, JG (NEM) Cadet (S4-7) Ensign (S3-4) Ensign (acting) (S1-3) Civilian (S1) | USS Titan (NEM) Starfleet Academy (S4-7) USS Enterprise-D (S1-4) | Traveler (PIC S2) , (PRO S2) Engineering officer (NEM) Starfleet cadet (S4-7) Helmsman (S1-4) | Human | ||
| Hugh Culber | Wilson Cruz | Season 1–5(DSC) | USS Discovery | Doctor | Human | ||
| Jal Culluh | Anthony De Longis | Seasons 1–3 (VOY) | First Maje | Kazon-Nistrim | Leader of Kazon-Nistrim | Kazon | |
| Elizabeth Cutler | Kellie Waymire | Season 1 (ENT) | Crewman | Enterprise NX-01 | Entomologist | Human | |
| Leonardo da Vinci | John Rhys-Davies | Seasons 3–4 (VOY) | None | USS Voyager Program | Holographic character | Hologram | |
| Damar | Casey Biggs | Seasons 4–7 (DS9) | Legate (S7) Gul (S6-7) Glinn (S4-6) | Cardassia Prime CMS Groumall (S4) | Leader of Cardassian Union (S7) Dominion leader (S6-7) Vigilante (S5) Cardassian officer (S4) | Cardassian | |
| Daniels /Kovich | David Cronenberg | Seasons 3-5 (DSC) Seasons 1–4 (ENT) | Federation official Crewman | Federation Headquarters Unknown | Scientist in cognitive science, with specialties in artificial sentience and intelligence Temporal agent | Mostly Human | |
| Matt Winston | |||||||
| Data | Brent Spiner | Seasons 1–7 (TNG) Movies (GEN, FCT, INS, NEM) Season 1 (PIC) | Lt. Commander | USS Enterprise-E (FCT, INS, NEM) USS Enterprise-D (S1-7, GEN) | Chief operations officer (TNG, GEN, FCT, INS, NEM) | Android | |
| Ezri Dax | Nicole de Boer | Season 7 (DS9) | Lieutenant, JG (S7) Ensign (S7) | Deep Space 9 | Counselor | Trill | |
| Jadzia Dax | Terry Farrell | Seasons 1–6 (DS9) | Lt. Commander (S4-6) Lieutenant (S1-3) | Deep Space 9 | Chief science officer | Trill | |
| Degra | Randy Oglesby | Season 3 (ENT) | Civilian | Xindi Council | Scientist | ||
| Keyla Detmer | Emily Coutts | Seasons 1–3 (DSC) | Lieutenant (S1-2) Lieutenant, JG (S1) | USS Discovery (S1-2) USS Shenzhou (S1) | Helmsman | Human | |
| The Doctor | Robert Picardo | Seasons 1–7 (VOY) | None | USS Voyager | Chief medical officer | Hologram | |
| Dolim | Scott MacDonald | Season 3 (ENT) | Commander | Xindi Council | Council member | ||
| Dukat | Marc Alaimo | Seasons 1–7 (DS9) | Gul | Cardassia Prime | Religious leader (S6-7) Leader of Cardassia (S5) Vigilante (S4-5) Freighter commander (S4) Cardassian officer (S1-4) | Cardassian | |
| Michael Eddington | Kenneth Marshall | Seasons 3–5 (DS9) | Civilian (S4-5) Lt. Commander (S3-4) | Deep Space 9 (S3-4) | Maquis (S7) Security officer (S5-7) | Human | |
| Elnor | Evan Evagora | Seasons 1-2 (PIC) | Cadet (S2) Qowat Milat (S1) | USS Excelsior (S2) Vashti resident (S1) | Starfleet cadet (S2) Qalankhkai to Picard (S1) | Romulan | |
| Kova Rin Esmar | Jin Maley | Season 3 (PIC) | Ensign | USS Enterprise NCC-1701-G (PIC S3) USS Titan (NCC-80102-A) (PIC S3) | Communications officer | Haliian | |
| Evek | Richard Poe | Season 7 (TNG) Season 2 (DS9) Season 1 (VOY) | Gul | CMS Vetar | Commanding officer | Cardassian | |
| Female Changeling | Salome Jens | Seasons 3–4,6–7 (DS9) | None | Cardassia Prime | Leader of Dominion | Changeling | |
| Vic Fontaine | James Darren | Seasons 6–7 (DS9) | None | Deep Space 9 Program | Holographic entertainer | Hologram | |
| Maxwell Forrest | Vaughn Armstrong | Seasons 1–4 (ENT) | Vice Admiral | Starfleet Command | NX Project | Human | |
| Alonzo Freeman | Phil LaMart | Seasons 1-4 (LOW) | Admiral | Starfleet Command | Flag officer | Human | |
| Carol Freeman | Dawnn Lewis | Seasons 1-5 (LOW) | Captain | USS Cerritos | Commanding officer | Human | |
| Elim Garak | Andrew Robinson | Seasons 1–7 (DS9) | Civilian | Deep Space 9 resident | Tailor | Cardassian | |
| Garrison | Adam Roarke | "The Cage" | Chief petty officer | USS Enterprise | Communications officer | Human | |
| Philippa Georgiou | Michelle Yeoh | Seasons 1-3 (DSC) Season 1 (S31) | Captain (S1) | NCIA-93 (S2) Section 31 (S1-3) USS Shenzhou (S1) | Intelligence operative (S1-3) Emperor, Mirror Universe (S1) Commanding officer (S1) | Human | |
| Sonya Gomez | Lycia Naff | Season 2 (TNG) Season 2 (LOW) | Ensign | USS Enterprise-D | Engineering officer | Human | |
| Gowron | Robert O'Reilly | Seasons 4–6 (TNG) Seasons 3–7 (DS9) | Chancellor | Klingon High Council | Chancellor of Klingon Empire | Klingon | |
| Amanda Grayson | Jane Wyatt | Season 2 (TOS) Movies (TVH, TFF) | Civilian | Vulcan resident | Teacher | Human | |
| Majel Barrett | Seasons 1 (TAS) | ||||||
| Winona Ryder | ST09 | ||||||
| Mia Kirshner | Season 1 (DSC) Season 2 (SNW) | ||||||
| Guinan | Whoopi Goldberg | Seasons 2–6 (TNG) Movies (GEN, NEM) Season 2 (PIC) | Civilian | USS Enterprise-D | Bartender | El-Aurian | |
| Gwyndala "Gwyn" | Ella Purnell | Seasons 1-2 (PRO) | Civilian | USS Protostar NX-76884 | Captain (S2) Communications officer (S1) | Vau N'Akat | |
| J. Hayes | Steven Culp | Season 3 (ENT) | Major | Enterprise NX-01 | MACO officer | Human | |
| Erika Hernandez | Ada Maris | Season 4 (ENT) | Captain | Columbia NX-02 | Commanding officer | Human | |
| Hogan | Simon Billig | Seasons 2–3 (VOY) | Ensign (provisional) | USS Voyager | Engineering officer Maquis (previous) | Human | |
| Mr. Homn | Carel Struycken | Seasons 1–5 (TNG) | Civilian | Betazed resident | Servant | Unknown | |
| Hugh | Jonathan Del Arco | Seasons 5–7 (TNG) Season 1 (PIC) | None | Romulan reclamation site | Borg drone (TNG) Director of Romulan reclamation site (PIC) | Borg (TNG) Human/xB (PIC) | |
| Icheb | Manu Intiraymi | Seasons 6–7 (VOY) | Civilian (VOY) | USS Voyager resident (VOY) | Astrometrics (VOY) | Borg (VOY S6) Brunali/xB (VOY S6-7, PIC) | |
| Casey King | Season 1 (PIC) | Lieutenant (PIC) | USS Coleman (PIC) | Command officer (PIC) | |||
| Ilthuran/The Diviner | John Noble | Seasons 1-2 (PRO) | Civilian | Solum Tars Lamora | Astronomer Prison colony tyrant | Vau N’Akat | |
| Ishka | Cecily Adams | Seasons 3, 5–7 (DS9) | Civilian | Ferenginar resident | Philanthropist | Ferengi | |
| Andrea Martin | |||||||
| Kathryn Janeway | Kate Mulgrew | Seasons 1–7 (VOY) Movies (NEM) Seasons 1-2 (PRO) | Vice Admiral (NEM) Captain (VOY) | Starfleet Command (NEM) USS Dauntless (PRO) USS Voyager (VOY) | Starfleet Admiral (NEM) Commanding officer (VOY) | Human | |
| Jannar | Rick Worthy | Season 3 (ENT) | Civilian | Xindi Council | Scientist | ||
| Michael Jonas | Raphael Sbarge | Season 2 (VOY) | Crewman (provisional) | USS Voyager | Engineering officer Maquis (previous) | Human | |
| Agnes Jurati | Alison Pill | Seasons 1-2 (PIC) | Civilian | Daystrom Institute | Cyberneticist | Human | |
| K'Ehleyr | Suzie Plakson | Seasons 2, 4 (TNG) | Ambassador | Earth resident | Federation Ambassador | Klingon/Human | |
| Kes | Jennifer Lien | Seasons 1–4, 6 (VOY) | Civilian | USS Voyager | Medic Aeroponics | Ocampa | |
| Harry Kim | Garrett Wang | Seasons 1–7 (VOY) | Ensign | USS Voyager | Chief operations officer | Human | |
| Kira Nerys | Nana Visitor | Seasons 1–7 (DS9) | Colonel (S7) Commander (S7) Major (S1-6) | Deep Space 9 | Commanding officer (S7) First officer (S1-7) | Bajoran | |
| George Kirk | Chris Hemsworth | ST09 | Captain | USS Enterprise (ST09) | Commanding officer | Human | |
| George Samuel "Sam" Kirk Jr. | William Shatner | Season 1(TOS)(Operation -- Annihilate!) Seasons 1–2 (SNW) | Lieutenant, JG | Deneva, USS Enterprise | Xenoanthropologist, research biologist | Human | |
| Dan Jeannotte | |||||||
| James T. Kirk | William Shatner | Seasons 1–3 (TOS) Seasons 1–2 (TAS) Movies (TMP, WOK, SFS, TVH, TFF, TUC, GEN, ST09, STID, STB) Season 5 (DS9) Seasons 1-2 (SNW) | Captain (TOS, TAS, TFF, TUC, GEN, STID, STB) Rear Admiral (TMP, WOK, SFS, TVH) Cadet (ST09)Lieutenant (SNW) | USS Enterprise-A (TVH, TFF, TUC) USS Enterprise (TOS, TAS, TMP, WOK, SFS, ST09, STID, STB, SNW) USS Farragut (SNW) | Commanding officer (TOS, TAS, TMP, WOK, SFS, TVH, TFF, TUC, STID, STB) First officer (ST09, SNW) | Human | |
| Chris Pine | |||||||
| Paul Wesley | |||||||
| Kol | Kenneth Mitchell | Season 1 (DSC) | General, Klingon Empire | Klingon High Council | Council Member | Klingon | |
| Kor | John Colicos | Season 1 (TOS) Season 1 (TAS) Seasons 2, 4, 7 (DS9) | Dahar Master (DS9) Commander, Klingon Empire (TOS, TAS) | Klingon Defense Force (DS9) IKS Klothos (TOS, TAS) | Defence officer (DS9) Commanding officer (TOS, TAS) | Klingon | |
| Kurn | Tony Todd | Seasons 3–5 (TNG) Season 4 (DS9) | Crewman, Bajoran Militia (DS9) Captain, Klingon Empire (TNG) | Deep Space 9 (DS9) IKS Hegh'ta (TNG) | Security officer (DS9) Commanding officer (TNG) | Klingon | |
| Alandra La Forge | Mica Burton | Season 3 (PIC) | Ensign | Fleet Museum | Engineer | Human | |
| Geordi La Forge | LeVar Burton | Seasons 1–7 (TNG) Movies (GEN, FCT, INS, NEM) Season 5 (VOY) Season 3 (PIC) | Commodore (S3, PIC) Lt. Commander (S3-7, movies) Lieutenant (S2) Lieutenant, JG (S1) | Federation Fleet Museum (S3, PIC) USS Enterprise-E (FCT, INS, NEM) USS Enterprise-D (S1-7, GEN) | Curator (S3, PIC) Chief engineer (S2-7, movies) Helmsman (S1) | Human | |
| Sidney La Forge | Ashlei Sharpe Chestnut | Season 3 (PIC) | Enterprise NCC-1701-G USS Titan (NCC-80102-A) | Helmsman | Human | ||
| Laris | Orla Brady | Seasons 1-2 (PIC) | Civilian | Earth resident | Vineyard Manager | Romulan | |
| Leeta | Chase Masterson | Seasons 3–7 (DS9) | Civilian | Deep Space 9 resident | Dabo Girl | Bajoran | |
| Leland | Alan van Sprang | Season 2 (DSC) | Captain | NCIA-93 Section 31 | Commanding officer Intelligence Operative | Human | |
| Li Nalas | Richard Beymer | Season 2 (DS9) | Navarch | Deep Space 9 | Liaison officer | Bajoran | |
| Linus | David Benjamin Tomlinson | Seasons 2–3 (DSC) | Lieutenant, JG | USS Discovery | Science officer | Saurian | |
| Gabriel Lorca | Jason Isaacs | Season 1 (DSC) | Captain | USS Discovery | Commanding officer | Human | |
| Lore | Brent Spiner | Season 3 (PIC) Seasons 1, 4, 6–7 (TNG) | Civilian | Android | |||
| L'Rell | Mary Chieffo | Seasons 1–2 (DSC) | Chancellor | Klingon High Council | Chancellor of Klingon Empire | Klingon | |
| Lursa | Barbara March | Seasons 4–5, 7 (TNG) Movies (GEN) Season 1 (DS9) | Captain, Klingon Empire | Bird of Prey | Commanding officer | Klingon | |
| Ma’ah | Jon Curry | Seasons 2, 4-5 (LOW) | Captain Helm officer | Bloodwine delivery ship IKF Che'Ta | Captain Helm officer | Klingon | |
| Maihar'du | Tiny Ron Taylor | Seasons 1–3, 5–7 (DS9) | Civilian | Ferenginar resident | Attendant to Grand Nagus | Hupyrian | |
| Maj'el | Michaela Dietz | Season 2 (PRO) | Ensign | Command division officer, USS Prodigy Starfleet Academy fourth year cadet, USS Voyager | Vulcan | ||
| Mallora | Tucker Smallwood | Season 3 (ENT) | Civilian | Xindi Council | Chairman | Xindi-Primate | |
| Carol Marcus | Bibi Besch | Movies (WOK, SFS, STID) | Civilian (WOK, SFS) Lieutenant (STID) | Project Genesis (WOK, SFS) USS Enterprise (STID) | Biologist | Human | |
| Alice Eve | |||||||
| Beckett Mariner | Tawny Newsome | Seasons 1-5 (LOW) Season 2 (SNW) (Those Old Scientists) | Ensign (Seasons 1-3) Lieutenant, JG (Season 4) | USS Cerritos | Human | ||
| Martok | J. G. Hertzler | Seasons 4–7 (DS9) | Chancellor (S7) General, Klingon Empire (S4-7) | Deep Space 9 IKS Rotarran | Chancellor of Klingon Empire (S7) Commander of Klingon Forces (S4-7) | Klingon | |
| Travis Mayweather | Anthony Montgomery | Seasons 1–4 (ENT) | Ensign | Enterprise NX-01 | Helmsman | Human | |
| Joseph M'Benga | Booker Bradshaw | Seasons 2-3 (TOS) Seasons 1–2 (SNW) | Commander | Doctor Chief medical officer, | Human | ||
| Babs Olusanmokun | |||||||
| Rukiya M'Benga | Sage Arrindell | Season 1 (SNW) | Civilian | USS Enterprise | Civilian | Human | |
| Mukambe Simamba | |||||||
| Leonard McCoy | DeForest Kelley | Seasons 1–3 (TOS) Seasons 1–2 (TAS) Movies (TMP, WOK, SFS, TVH, TFF, TUC, ST09, STID, STB) Season 1 (TNG) Season 5 (DS9) | Admiral (TNG) Commander (TMP, WOK, SFS, TVH, TFF, TUC) Lt. Commander (TOS, TAS, ST09, STID, STB) | USS Enterprise-A (TVH, TFF, TUC) USS Enterprise (TOS, TAS, TMP, WOK, SFS, ST09, STID, STB) | Chief medical officer | Human | |
| Karl Urban | |||||||
| Mezoti | Marley S. McClean | Seasons 6–7 (VOY) | Civilian | USS Voyager Passenger | Norcadian | ||
| Migleemo | Paul F. Tompkins | Seasons 1-4 (LOW) | Commander? | USS Cerritos | Ship's Counselor | Unnamed ornithoid species | |
| Mila | Julianna McCarthy | Seasons 3,7 (DS9) | Civilian | Cardassia resident | Housekeeper | Cardassian | |
| Mora Pol | James Sloyan | Seasons 2,5 (DS9) | Civilian | Bajor resident | Scientist | Bajoran | |
| Morn | Mark Allen Shepherd | Seasons 1–7 (DS9) Season 1 (VOY) | Civilian | Deep Space 9 resident | Courier | Lurian | |
| Mot | Ken Thorley | Seasons 5–6 (TNG) | Civilian | USS Enterprise-D | Barber | Bolian | |
| Harry Mudd | Roger C. Carmel | Seasons 1–2 (TOS) Season 1 (TAS) Season 1 (DSC) Season 1 (ST) | Civilian | Smuggler | Human | ||
| Rainn Wilson | |||||||
| Matthew Arliss Mura | Joseph Lee | Season 3 (PIC) | Lieutenant | USS Enterprise NCC-1701-G (PIC S3) USS Titan (NCC-80102-A) (PIC S3) | Tactical officer | Bajoran | |
| Murf | Dee Bradley Baker | Season 1 (PRO) | Ensign (S2) Starfleet Academy cadet (S2) Civilian (S1) | USS Protostar NX-76884 | Civilian/Security officer | Mellanoid slime worm | |
| Raffi Musiker | Michelle Hurd | Seasons 1-3 (PIC) | Commander (S2) Civilian (S1) | Enterprise NCC-1701-G (S3) Starfleet Intelligence (S3) USS Excelsior (S2) | First officer Undercover intelligence agent Chief operations officer (S2) | Human | |
| Harry Treadaway | Season 1 (PIC) | Zhat Vash Operative | Romulan | ||||
| Naya | Victoria Sawal | Season 5 (DSC) | Lieutenant | USS Discovery NCC 1031-A (DSC S5) | Operations officer | Human | |
| Alynna Nechayev | Natalia Nogulich | Seasons 6–7 (TNG) Seasons 2–3 (DS9) | Fleet Admiral | Starfleet Command | Admiral of Starfleet | Human | |
| Neelix | Ethan Phillips | Seasons 1–7 (VOY) | Ambassador (S7) Civilian (S1-7) | Talaxian Asteroid Colony (S7) USS Voyager (S1-7) | Federation Ambassador (S7) Chef (S1-7) | Talaxian | |
| Nhan | Rachael Ancheril | Seasons 2-3 (DSC) | Commander | USS Discovery (S2-3) USS Enterprise (S2) | Chief security officer | Barzan | |
| Susan Nicoletti | Christine Delgado | Seasons 1–4,7 (VOY) | Lieutenant, JG | USS Voyager | Engineering officer | Human | |
| Eva Nilsson | Sara Mitich | Seasons 2-4 (DSC) | Lieutenant | USS Voyager NCC 74656 (DSC S5) USS Discovery | Operations officer | Human | |
| Nog | Aron Eisenberg | Seasons 1–7 (DS9) | Lieutenant, JG (S7) Ensign (S6-7) Cadet (S4-5) Civilian (S1-4) | Deep Space 9 Starfleet Academy (S4-5) | Operations officer (S6-7) Starfleet cadet (S4-5) Bar employee (S1-4) Student (S1-4) | Ferengi | |
| Khan Noonien Singh | Ricardo Montalbán | Season 1 (TOS) Movies (WOK, STID) (SNW S2)) (Tomorrow and Tomorrow and Tomorrow) | Civilian | SS Botany Bay (TOS) | Superhuman | Human Augment | |
| Benedict Cumberbatch | |||||||
| Desmond Sivan (as a child) | |||||||
| La'an Noonien-Singh | Christina Chong (primary) Ava Cheung (as a child) | Seasons 1-2 (SNW) | Lieutenant | USS Enterprise | Chief security officer | Human | |
| Noum | Jason Alexander | Seasons 1-2 (PRO) | Lietenant | USS Voyager-A USS Dauntless | Ship’s counselor Chief medical officer | Tellarite | |
| Kashimuro Nozawa | John Tampoya | Seasons 1–4,7 (VOY) | Ensign | USS Voyager | Operations officer | Human | |
| Keiko O'Brien | Rosalind Chao | Seasons 4–6 (TNG) Seasons 1–7 (DS9) | Civilian | Deep Space 9 (DS9) USS Enterprise-D (TNG) | Teacher/Botanist (DS9) Botanist (TNG) | Human | |
| Miles O'Brien | Colm Meaney | Seasons 1–7 (TNG) Seasons 1–7 (DS9) | Chief petty officer | Starfleet Academy (DS9 S7) Deep Space 9 (DS9 S1-7) USS Enterprise-D (TNG S1-6) | Academy professor (DS9 S7) Chief of operations (DS9 S1-7) Transporter chief (TNG S2-6) Helmsman (TNG S1) | Human | |
| Molly O'Brien | Hana Hatae | Seasons 1–7 (DS9) | Civilian | Deep Space 9 resident | Student | Human | |
| Odo | René Auberjonois | Seasons 1–7 (DS9) | Constable (unofficial) | Deep Space 9 | Chief of security | Changeling | |
| Alyssa Ogawa | Patti Yasutake | Seasons 3–7 (TNG) Movies (GEN, FCT) | Lieutenant, JG (S7, movies) Ensign (S3-7) | USS Enterprise-E (FCT) USS Enterprise-D (S3-7, GEN) | Nurse | Human | |
| Oh | Tamlyn Tomita | Season 1 (PIC) | Commodore | Starfleet Command | Head of Starfleet Security | Vulcan | |
| Opaka Sulan | Camille Saviola | Seasons 1–2,4 (DS9) | Kai | Bajor resident | Bajoran religious leader (S1) | Bajoran | |
| Joann Owosekun | Oyin Oladejo | Seasons 1–5 (DSC) | Lieutenant, JG | USS Discovery | Operations officer | Human | |
| Owen Paris | Warren Munson Richard Herd | Seasons 2,5–7 (VOY) | Admiral | Starfleet Command | Pathfinder Project | Human | |
| Tom Paris | Robert Duncan McNeill | Seasons 1–7 (VOY) Season 1 (LOW) | Lieutenant (LOW S1) Lieutenant, JG (S1-7) Ensign (S5-6) | USS Voyager | Helmsman | Human | |
| Phlox | John Billingsley | Seasons 1–4 (ENT) | Civilian | Enterprise NX-01 | Chief medical officer | Denobulan | |
| Jean-Luc Picard | Patrick Stewart | Seasons 1–7 (TNG) Movies (GEN, FCT, INS, NEM) Season 1 (DS9) Seasons 1-3 (PIC) | Admiral (PIC) Captain (TNG, movies) | Earth resident (PIC) USS Enterprise-E (FCT, INS, NEM) USS Enterprise-D (TNG S1-7, GEN) | Commanding officer (TNG, movies) | Human | |
| Renée Picard | Penelope Mitchell | Season 2 (PIC) | Civilian | Europa Mission | NASA Astronaut | Human | |
| Christopher Pike | Jeffrey Hunter | "The Cage" Season 1 (TOS) | Admiral (STID) Captain (TC, TOS, ST09, DSC) | Starfleet Command (STID) USS Enterprise (TC, ST09, DSC) | Starfleet Admiral (STID) Commanding officer (TC, ST09, DSC) | Human | |
| Bruce Greenwood | ST09, STID | ||||||
| Anson Mount | Season 2 (DSC) Seasons 1-2 (SNW)re | ||||||
| Jankom Pog | Jason Mantzoukas | Seasons 1-2 (PRO) | Ensign (S2) Starfleet Academy cadet (S2) Civilian (S1) | USS Protostar NX-76884 | Engineer | Tellarite | |
| Tracy Pollard | Raven Dauda | Seasons 1–5 (DSC) | Lieutenant, JG | USS Discovery | Medical officer | Human | |
| Katherine Pulaski | Diana Muldaur | Season 2 (TNG) | Commander | Chief medical officer | Human | ||
| Q | John de Lancie | Seasons 1–4, 6–7 (TNG) Season 1 (DS9) Seasons 2–3, 7 (VOY) Season 1 (LOW) Season 2 (PIC) | None | Q Continuum resident | Q Continuum | Q | |
| Quark | Armin Shimerman | Season 7 (TNG) Seasons 1–7 (DS9) Season 1 (VOY) | Civilian | Deep Space 9 resident | Bar Owner | Ferengi | |
| Teresa Ramirez | Sol Rodriguez | (PIC S2) | Civilian | Earth resident | Medical doctor associated with the humanitarian organization Mariposas | Human | |
| Ricardo Ramirez | Steve Gutierrez | (PIC S2) | Civilian | Earth resident | Student | Human | |
| Janice Rand | Grace Lee Whitney | Season 1 (TOS) Movies (TMP, TVH, TUC) Season 3 (VOY) | Commander (TUC) Chief petty officer (TVH) Crewman (TMP) Yeoman (TOS) | USS Excelsior (TUC) Starfleet Command (TVH) USS Enterprise (TOS, TMP) | First officer (TUC) Starfleet Command officer (TVH) Transporter chief (TMP) Yeoman (TOS) | Human | |
| Jack Ransom | Jerry O'Connell | Seasons 1-5 (LOW) | Commander | USS Cerritos | First officer | Human | |
| Rayner | Callum Keith Rennie | Season 5 (DSC) | Commander Captain | USS Discovery NCC-1031-A USS Antares | First officer Commanding officer | Kellerun | |
| Rebi | Cody Wetherill | Seasons 6–7 (VOY) | Civilian | USS Voyager Passenger | Wysanti/xB | ||
| Malcolm Reed | Dominic Keating | Seasons 1–4 (ENT) | Lieutenant | Enterprise NX-01 | Tactical officer | Human | |
| Dal R'El | Brett Gray | Seasons 1-2 (PRO) | Ensign (S2) Starfleet Academy cadet (S2) Civilian (S1) | USS Protostar NX-76884) | Acting first officer (S2) Captain (S1) | Augment (Artificially created hybrid of many species) | |
| Jet Reno | Tig Notaro | Seasons 2-5 (DSC) | Lt. Commander | USS Discovery (S2-3) USS Hiawatha (S2) | Chief Engineer | Human | |
| Gen Rhys | Patrick Kwok-Choon | Seasons 1-5 (DSC) | Lieutenant | USS Discovery | Tactical officer | Human | |
| William Riker | Jonathan Frakes | Seasons 1–7 (TNG) Movies (GEN, FCT, INS, NEM) Season 2 (VOY) Season 4 (ENT) Seasons 1,3 (PIC) Season 1 (LOW) | Captain pro tem (PIC S3) Captain (NEM, PIC, LOW) Commander (TNG S1-7, movies) | USS Titan (NCC-80102-A) USS Zheng He (PIC S1) USS Titan (NEM, LOW S1) USS Enterprise-E (FCT, INS, NEM) USS Enterprise-D (TNG S1-7, GEN) | Commanding officer (NEM, PIC S1, LOW S1) First officer (TNG S1-7, movies) | Human | |
| Laira Rillak | Chelah Horsdal | Seasons 4-5 (DSC) | Civilian | None | President of the United Federation of Planets | Human/Bajoran/Cardassian | |
| Santiago Cabrera | Seasons 1-2 (PIC) | Captain (S2) Civilian (S1) | USS Stargazer (S2) La Sirena (S1) | Commanding officer (S2) Civilian Starship Captain (S1) | Human | ||
| Narissa Rizzo | Peyton List | Season 1 (PIC) | Colonel | Zhat Vash Operative | Romulan | ||
| Ro Laren | Michelle Forbes | Seasons 5–7 (TNG) Season 3 (PIC) | Commander (PIC) Lieutenant (S7) Ensign (S5-6) | USS Enterprise-D | Starfleet Intelligence operative (PIC) Maquis (S7) Helmsman (S5-7) | Bajoran | |
| Rok-Takh | Rylee Alazraqui | Seasons 1-2 (PRO) | Ensign (S2) Starfleet Academy cadet (S2) Civilian (S1) | USS Protostar NX-76884 | Science officer | Brikar | |
| Rom | Max Grodénchik | Seasons 1–7 (DS9) | Grand Nagus (S7) Crewman (S4-7) Civilian (S1-4) | Deep Space 9 | Grand Nagus (S7) Maintenance Engineer (S4-7) Bar employee (1–4) | Ferengi | |
| William Ross | Barry Jenner | Seasons 6–7 (DS9) | Vice Admiral | Deep Space 9 | Military commander | Human | |
| Michael Rostov | Joseph Will | Seasons 1–2 (ENT) | Crewman | Enterprise NX-01 | Engineering officer | Human | |
| Alexander Rozhenko | Jon Paul Steuer | Seasons 4–7 (TNG) Season 6 (DS9) | Crewman, Klingon Empire (DS9) Civilian (TNG) | IKS Rotarran (DS9) | Weapons officer (DS9) | Klingon/Human | |
| Brian Bonsall | |||||||
| Marc Warden | |||||||
| Samanthan "Sam" Rutherford | Eugene Cordero | Seasons 1-5 (LOW) | USS Cerritos | Science officer | Human, cybernetically enhanced | ||
| Saavik | Kirstie Alley | Movies (WOK, SFS, TVH) | Lieutenant, JG | USS Grissom (SFS, TVH) USS Enterprise (WOK) | Science officer (SFS, TVH) Navigator (WOK) | Vulcan/Romulan | |
| Robin Curtis | |||||||
| Sarek | Mark Lenard | Season 2 (TOS) Seasons 1 (TAS) Movies (TMP, SFS, TVH, TUC, ST09) Seasons 3, 5 (TNG) Seasons 1–2 (DSC) | Ambassador | Vulcan resident | Federation Ambassador | Vulcan | |
| Ben Cross | |||||||
| James Frain | |||||||
| Saru | Doug Jones | Seasons 1–5 (DSC) Season 1 (ST) | Commander Captain Federation Ambassador | Federation Headquarters (DSC S5) USS Discovery (S1-3) USS Shenzhou (S1) | Federation Ambassador (DSC S5) First officer (S4-5) Captain (S3) First officer (S1-2) Science officer (S1) | Kelpien | |
| Hoshi Sato | Linda Park | Seasons 1–4 (ENT) | Ensign | Enterprise NX-01 | Communications officer | Human | |
| Montgomery Scott | James Doohan | Seasons 1–3 (TOS) Seasons 1–2 (TAS) Movies (TMP, WOK, SFS, TVH, TFF, TUC, GEN, ST09, STID, STB) Season 6 (TNG) Season 5 (DS9) Season 2 (SNW) | Captain (SFS, TVH, TFF, TUC, GEN, TNG) Commander (TMP, WOK) Lt. Commander (TOS, TAS, ST09, STID, STB) Lieutenant, Junior Grade (SNW S2) | USS Enterprise-A (TVH, TFF, TUC) USS Enterprise (TOS, TAS, TMP, WOK, SFS, ST09, STID, STB) USS Stardiver | Chief Engineer | Human | |
| Simon Pegg | |||||||
| Martin Quinn | |||||||
| Sela | Denise Crosby | Seasons 4–5 (TNG) | Commander, Romulan Empire | Unknown | Romulan officer | Romulan/Human | |
| Seska | Martha Hackett | Seasons 1–3,7 (VOY) | None (S1-3) Ensign (provisional) (S1) | Kazon-Nistrim (S1-3) USS Voyager (S1) | Kazon Affiliate (S1-3) Engineering officer (S1) Science officer (S1) Maquis Infiltrator (previous) | Cardassian | |
| Seven of Nine | Jeri Ryan | Seasons 1-3 (PIC) Seasons 4–7 (VOY) | Captain (PIC S3) Commander (PIC S3) Civilian (PIC S1-2) (VOY S4-7) | Enterprise NCC-1701-G (PIC S3) USS Titan (NCC-80102-A) (PIC S3) La Sirena (PIC S2) USS Voyager (VOY S4-7) | Captain (PIC S3) First officer (PIC S3) Vigilante (PIC S1-2) Astrometrics (VOY S4-7) | Human/xB | |
| Shakaar Edon | Duncan Regehr | Seasons 3–5 (DS9) | First Minister | Bajor resident | First Minister of Bajor | Bajoran | |
| Liam Shaw | Todd Stashwick | Season 3 (PIC) | Captain | USS Titan (NCC-80102-A) (PIC S3) | Commanding officer | Human | |
| Shaxs | Fred Tatasciore | Seasons 1-4 (LOW) | Lieutenant | USS Cerritos | Chief security officer | Bajoran | |
| Thy'lek Shran | Jeffrey Combs | Seasons 1–4 (ENT) | General | Kumari | Andorian Imperial Guard | Andorian | |
| Jennifer Sh'reyan | Lauren Lapkus | Seasons 1-4 (LOW) | Ensign | USS Cerritos | Counselor | Andorian | |
| Silik | John Fleck | Seasons 1–4 (ENT) | Senior official | Suliban Cabal | Terrorist | ||
| Benjamin Sisko | Avery Brooks | Seasons 1–7 (DS9) | Captain (S3-7) Commander (S1-3) | Deep Space 9 | Commanding officer | Human | |
| Jake Sisko | Cirroc Lofton | Seasons 1–7 (DS9) | Civilian | Deep Space 9 resident | Journalist (S5-7) Student (S1-5) | Human | |
| Jennifer Sisko | Felecia M. Bell | Seasons 1,3–4 (DS9) | Lieutenant (S1) | USS Saratoga (S1) | Starfleet officer (S1) | Human | |
| Joseph Sisko | Brock Peters | Seasons 4,6–7 (DS9) | Civilian | Earth resident | Restaurant Owner | Human | |
| Sarah Sisko | Deborah Lacey | Season 7 (DS9) | Civilian | Earth resident | Holophotographer | Human | |
| Luther Sloan | William Sadler | Seasons 6–7 (DS9) | None | Section 31 | Intelligence Operative | Human | |
| Kore Soong | Isa Briones | Season 2 (PIC) | Civilian | Resident of Earth | Traveler | Human | |
| Soval | Gary Graham | Seasons 1–4 (ENT) | Ambassador | Earth | Vulcan Ambassador to Earth | ||
| Spock | Leonard Nimoy | "The Cage" Seasons 1–3 (TOS) Seasons 1–2 (TAS) Movies (TMP, WOK, SFS, TVH, TFF, TUC, ST09, STID, STB) Season 5 (TNG) Season 5 (DS9) Season 2 (DSC) Season 1 (SNW) | Ambassador (TNG, ST09, STID) Captain (WOK, SFS, TVH) Commander (TC, TOS, TAS, TMP, ST09, STID, STB, DSC) | New Vulcan resident (STID) USS Enterprise-A (TVH, TFF, TUC) USS Enterprise (TC, TOS, TAS, TMP, ST09, STID, STB, DSC) Instructor (ST09) | Federation Ambassador (TNG, ST09, STID) First officer (TC, TOS, TAS, movies) Science officer (TC, TOS, TAS, ST09, STID, STB, DSC) | Vulcan/Human | |
| Zachary Quinto | |||||||
| Ethan Peck | |||||||
| Paul Stamets | Anthony Rapp | Season 1-5 (DSC) | Commander Lt. Commander (S2) Lieutenant (S1) | USS Discovery | Science officer | Human | |
| Lon Suder | Brad Dourif | Seasons 2–3 (VOY) | Crewman (provisional) | USS Voyager | Engineering officer Maquis (previous) | Betazoid | |
| Hikaru Sulu | George Takei | Seasons 1–3 (TOS) Seasons 1–2 (TAS) Movies (TMP, WOK, SFS, TVH, TFF, TUC, ST09, STID, STB) Season 3 (VOY) | Captain (TUC) Commander (WOK, SFS, TVH, TFF) Lt. Commander (TMP) Lieutenant (TOS, TAS, ST09, STID, STB) | USS Excelsior (TUC) USS Enterprise-A (TVH, TFF, TUC) USS Enterprise (TOS, TAS, TMP, WOK, SFS, ST09, STID, STB) | Commanding officer (TUC) Helmsman (TOS, TAS, TMP, WOK, SFS, TVH, TFF, ST09, STID, STB) | Human | |
| John Cho | |||||||
| Enabran Tain | Paul Dooley | Seasons 2–3,5 (DS9) | None | Cardassia resident | Leader of Obsidian Order | Cardassian | |
| Adira Tal | Blu del Barrio | Seasons 3-5 (DSC) | USS Discovery (S3-5) | Science officer (DSC S3-5) | Human | ||
| Gray Tal | Ian Alexander | Seasons 3-5 (DSC) | Civilian | Trill (DSC S4-5) USS Discovery (S3-4) | Guardian (DSC S5) Civilian (DSC S3-4) | Trill | |
| T'Ana | Gillian Vigman | Seasons 1-5 (LOW) | Commander | USS Cerritos | Chief medical officer | Caitian | |
| D'Erika Tendi | Ariel Winter | Seasons 4-5 (LOW) | Civilian | Orion | Head of House Tendi | Orion | |
| D'Vana Tendi | Noël Wells | Seasons 1-5 (LOW) | USS Cerritos | Science officer | Orion | ||
| Sylvia Tilly | Mary Wiseman | Season 1–5 (DSC) Season 1 (ST) | Lieutenant, JG (S3-5) Ensign (S2) Cadet (S1) | Starfleet Academy (S4-5) USS Discovery (S1-4) | Instructor (S4-5) Acting first officer (S3) Engineering officer (S2) Starfleet cadet (S1) | Human | |
| T'Lyn | Danielle Ruiz | Seasons 2-5 (LOW) | USS Cerritos VCF Sh'vhal | Science officer | Vulcan | ||
| Tomalak | Andreas Katsulas | Seasons 3–4,7 (TNG) | Commander, Romulan Empire | IRW Terix | Commanding officer | Romulan | |
| Tora Ziyal | Melanie Smith | Seasons 4–6 (DS9) | Civilian | Deep Space 9 resident | Artist | Bajoran/Cardassian | |
| Cyia Batten | |||||||
| B'Elanna Torres | Roxann Dawson | Seasons 1–7 (VOY) | Lieutenant, JG (provisional) | USS Voyager | Chief Engineer (S1-7) Maquis (S1) | Klingon/Human | |
| T'Pau | Celia Lovsky | Season 2 (TOS) (Amok Time) (ENT S4) | Civilian | None | Civilian | Vulcan | |
| Kara Zediker | |||||||
| T'Pol | Jolene Blalock | Seasons 1–4 (ENT) | Commander (S4) SubCommander (S1-4) | Enterprise NX-01 | First officer Science officer | Vulcan | |
| T'Pring | Arlene Martel | Season 2 (TOS) (Amok Time) (SNW S1-2) | Civilian | None | Civilian | Vulcan | |
| Gia Sandhu | |||||||
| The Traveler | Eric Menyuk | Seasons 1,4,7 (TNG) | Civilian | Tau Alpha C resident | Unknown | ||
| T'Rina | Tara Rosling | Seasons 3-5 (DSC) | Civilian | Ni'Var | President of Ni'Var | Vulcan | |
| Deanna Troi | Marina Sirtis | Seasons 1–7 (TNG) Movies (GEN, FCT, INS, NEM) Seasons 6–7 (VOY) Season 4 (ENT) Seasons 1,3 (PIC) Season 1 (LOW) | Commander (TNG S7, VOY, movies) Lt. Commander (TNG S1-7) | USS Titan (NEM) USS Enterprise-E (FCT, INS, NEM) USS Enterprise-D (TNG S1-7, GEN) | Diplomatic officer (NEM) Counselor (TNG S1-7, movies) | Betazoid/Human | |
| Lwaxana Troi | Majel Barrett | Seasons 1–5,7 (TNG) Seasons 1,3–4 (DS9) | Ambassador | Betazed resident | Federation Ambassador | Betazoid | |
| Kestra Troi-Riker | Lulu Wilson | Season 1 (PIC S1) Nepenthe | Civilian | Nepenthe resident | Student | Human/Betazoid | |
| Trip Tucker | Connor Trinneer | Seasons 1–4 (ENT) | Commander | Enterprise NX-01 | Chief Engineer | Human | |
| Tuvok | Tim Russ | Seasons 1–7 (VOY) Season 3 (LD) (Grounded) Season 3 (PIC) | Captain (PIC S3) Commander (LD S3) Lt. Commander (S4-7) Lieutenant (S1-4) | Starfleet Command (PIC S3) USS Voyager (VOY S1-7) | Chief of Security | Vulcan | |
| Ash Tyler/ | Shazad Latif | Seasons 1–2 (DSC) | Lieutenant (S1) | USS Discovery | Chief security officer (S1) | Human/Klingon | |
| T'Veen | Stephanie Czajkowski | Season 3 (PIC) | Lieutenant | USS Titan (NCC-80102-A) (PIC S3) | Science officer | Vulcan/Deltan | |
| José Tyler | Peter Duryea | "The Cage" | Lieutenant | USS Enterprise | Helmsman | Human | |
| Tysess | Daveed Diggs | Seasons 1-2 (PRO) | Commander | USS Voyager-A USS Dauntless | Executive officer | Andorian | |
| Nyota Uhura | Nichelle Nichols | Seasons 1–3 (TOS) Seasons 1–2 (TAS) Movies (TMP, WOK, SFS, TVH, TFF, TUC) Season 5 (DS9) | Commander (WOK, SFS, TVH, TFF, TUC) Lt. Commander (TMP) Lieutenant (TOS, TAS, ST09, STID, STB) | USS Enterprise-A (TVH, TFF, TUC) USS Enterprise (TOS, TAS, TMP, WOK, SFS, ST09, STID, STB) | Communications officer | Human | |
| Zoe Saldana | ST09, STID, STB | ||||||
| Celia Rose Gooding | SNW Seasons 1-2 | ||||||
| Charles Vance | Oded Fehr | Seasons 3-5 (DSC) | Fleet Admiral (PIC S3-5) | Starfleet Command | Commander-in-chief of Starfleet (DSC S3-5) | Human | |
| Vash | Jennifer Hetrick | Seasons 3–4 (TNG) Season 1 (DS9) | Civilian | Earth resident | Archeologist | Human | |
| Vorik | Alexander Enberg | Seasons 3–5, 7 (VOY) | Ensign | USS Voyager | Engineering officer | Vulcan | |
| Weyoun | Jeffrey Combs | Seasons 4–7 (DS9) | None | Cardassia Prime | Dominion Leader | Vorta | |
| Naomi Wildman | Scarlett Pomers | Seasons 2–7 (VOY) | Civilian | USS Voyager resident | Captain's Assistant (unofficial) | Ktarian/Human | |
| Samantha Wildman | Nancy Hower | Seasons 2–6 (VOY) | Ensign | USS Voyager | Science officer | Human | |
| Winn Adami | Louise Fletcher | Seasons 1–3, 5–7 (DS9) | Kai (S3-7) Vedek (S1-2) | Bajor resident | Bajoran religious leader | Bajoran | |
| Worf | Michael Dorn | Seasons 1–7 (TNG) Movies (GEN, FCT, INS, NEM) Seasons 4–7 (DS9) Season 3 (PIC) | Lt. Commander (DS9, movies) Ambassador (DS9 S7) Lieutenant (TNG S3-7) Lieutenant, JG (TNG S1-2) | Starfleet Intelligence (PIC S3) USS Enterprise-E (NEM) Qo'noS (DS9 S7) Deep Space 9 (DS9 S4-7) USS Enterprise-D (S1-7, GEN) | Intelligence operative (PIC S3) Strategic operations officer (DS9 S4-7, movies) Ambassador (DS9 S7) Chief security officer (TNG S2-7) Helmsman (TNG S1) | Klingon | |
| Tasha Yar | Denise Crosby | Seasons 1,3,7 (TNG) | Lieutenant | Chief security officer | Human | ||
| Kasidy Yates | Penny Johnson Jerald | Seasons 3–7 (DS9) | Captain | SS Xhosa Deep Space 9 resident | Freighter Captain | Human | |
| Zek | Wallace Shawn | Seasons 1–3,5–7 (DS9) | Grand Nagus | Ferenginar resident | Leader of Ferengi economics | Ferengi | |
| Zero | Angus Imrie | Seasons 1-2 (PRO) | Ensign (S2) Starfleet Academy cadet (S2) Civilian (S1) | USS Protostar NX-76884 | Science officer | Medusan | |
| Zhaban | Jamie McShane | Season 1 (PIC) | Civilian | Earth resident | Butler | Romulan |
See main article: List of Star Trek: The Original Series cast members.
See main article: List of Star Trek: The Next Generation cast members.
See main article: List of Star Trek: Deep Space Nine cast members.
See main article: List of Star Trek: Voyager cast members.
See main article: List of Star Trek: Enterprise cast members.
See main article: List of Star Trek: Discovery characters.
See main article: List of Star Trek: Picard characters.
See main article: List of Star Trek: Lower Decks characters.
See main article: Star Trek: Prodigy.
See main article: List of Star Trek: Strange New Worlds characters.
Star Trek has an ongoing tradition of actors returning to reprise their roles in other spin-off series. In some instances, actors have portrayed potential ancestors, descendants, or relatives of characters they originated. Characters have also been recast for later appearances.