| Name | Source | Type | |
|---|---|---|---|
| Star Trek | |||
| Waldahudin | Robert J. Sawyer's Starplex | ||
| Greg Egan's Diaspora | |||
| Wankh | Jack Vance's Planet of Adventure series | Black frog-like humanoids | |
| Warren Ampersand | Adventure Time | A blue shapeshifting alien and Jake's father. | |
| The Watcher | |||
| Waterseekers | Red Planet | ||
| Doctor Who | Statue-like humanoid | ||
| Torchwood | Humanoid | ||
| Whrloo | |||
| Willis the Bouncer | Red Planet | ||
| Winathians | A humanoid species from the planet Winath. They do not normally possess powers, with Garth Ranzz and Ayla Ranzz being metahumans with electric abilities. | ||
| Wirrn | Doctor Who | ||
| Wisps | Sonic the Hedgehog | Squid-like creatures of various shapes and colors | |
| Wogneer | Star Trek | ||
| Wolfweeds | Doctor Who | ||
| Wookiees | Star Wars | Humanoid | |
| Stargate | The wraith looks like a human; the difference is the grey skin, the long hair of all of them, and some little holes in the face. | ||
| Marathon Trilogy |