| Country: | Spain |
| Other Titles: | Copa RFEF |
| Current Champions: | Real Unión |
| Prev Season: | 2014–15 |
| Next Season: | 2016–17 |
| Winners: | At. Baleares |
| Second: | Rayo Majadahonda |
The 2015–16 Copa Federación de España was the 23rd edition of the Copa Federación de España, also known as Copa RFEF, a knockout competition for Spanish football clubs in Segunda División B and Tercera División. At. Baleares defeated Rayo Majadahonda 3–2 on aggregate in the final.
The champion won the trophy, a cash prize of €90,152 and the qualification for the next year tournament. The runner-up received a cash prize of €30,051 and every semifinalist €12,020. Additionally, each winner of autonomous community tournament received €3,005.
The competition started 29 July 2015 with Asturias tournament and finished 13 April 2016 with the final of national phase.
Peña Deportiva and Mercadal received a bye.
Aurrerá received a bye.
Tenerife B received a bye.
Quintanar del Rey received a bye.
Coruxo and received a bye.
Group A
Group B
Group C
Elche Ilicitano, Ontinyent and Torre Levante received a bye.
National phase began 2 December 2015.
-(3) Team playing in 2015–16 Segunda División B (third level in Spanish football)
-(4) Team playing in 2015–16 Tercera División (fourth level in Spanish football)
-(DNP) Team renounced to play
Qualified teams
The draw for the first round was held on November 3. Round of 32 was played between 2 and 17 December 2015.
Condal (4), SD Logroñés (4), Villa Santa Brígida (4) and Lorca (4) received a bye.
Pontevedra won 2–0 on aggregateGimnástica Torrelavega won 1–1 on away goals ruleRápido de Bouzas won 3–1 on aggregate after extra timeRayo Majadahonda won 2–1 on aggregateGuadalajara won 2–1 on aggregateMóstoles won 9–1 on aggregateElche Ilicitano won 3–3 on away goals ruleAt. Baleares won 1–0 on aggregate after extra timeSariñena won 3–1 on aggregate after extra timeMérida won 4–1 on aggregateBadajoz won 5–3 on aggregateQuintanar del Rey won 1–0 on aggregate
The draw for the Round of 16 was held on December 18. This round was played between 6 and 21 January 2016.
Rápido de Bouzas won 3–3 on aggregate on away goals ruleMérida won 8–2 on aggregateGimnástica Torrelavega won 5–3 on aggregateSariñena won 4–2 on aggregateAt. Baleares won 7–1 on aggregateElche Ilicitano won 2–1 on aggregateMóstoles won 3–2 on aggregateRayo Majadahonda won 3–1 on aggregate
The draw was held 22 January. Quarter-finals round was played between 3 and 10 February 2016.
Rayo Majadahonda won 4–1 on aggregateMérida won 4–1 on aggregateAt. Baleares won 3–3 on aggregate on away goals ruleGimnástica won 4–2 on aggregate
The draw was held 12 February. Semi-finals were played between 3 and 16 March 2016.
Rayo Majadahonda won 4–1 on aggregateAt. Baleares won 3–2 on aggregate
Final was played between 6 and 13 April 2016.
At. Baleares won 3–2 on aggregate