The 2014–15 Copa Federación de España was the 22nd 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. R. Unión defeated Castellón 4–0 on aggregate in the final. R. Unión got the trophy and a cash prize of 90.152 euros and qualified for the next edition of the tournament. Castellón received a prize of 30.051 euros and losing semifinalists 12.020 euros. Each winner of an Autonomous Community tournament received a prize of 3.005 euros.