1930–31 FA Cup

The 1930–31 FA Cup was the 56th staging of the world's oldest football cup competition, the Football Association Challenge Cup, commonly known as the FA Cup. West Bromwich Albion of the Football League Second Division won the competition, beating First Division team Birmingham 2–1 in the final at Wembley, London. In doing so Albion became the first and to date only club to both win the cup and gain promotion in the same year.

Matches were played at the stadium of the team named first on the date specified for each round, which was always a Saturday. If scores were level after 90 minutes had been played, a replay would take place at the stadium of the second-named team later the same week. If the replayed match was drawn further replays would be held at neutral venues until a winner was determined. If scores were level after 90 minutes had been played in a replay, a 30-minute period of extra time would be played.