The 1979–80 FA Cup was the 99th season of the world's oldest football knockout competition, The Football Association Challenge Cup, or FA Cup. The final saw second division West Ham United beat holders Arsenal 1–0. As of 2024, this was the last occasion when a club outside the top division of English football won the FA Cup.
The second round of games were intended to be played on 15 December 1979, but some matches were not played until 17–19 December and one until 5 January 1980. Replays took place at various dates after these games.
Teams from the Football League First and Second Division entered in this round. The third round of games in the FA Cup were mainly played on 5 January 1980, with some games taking place on 8–9 January and one on 14. Replays were intended for 8–9 January but again took place at various times.
The right to show FA Cup games were, as with Football League matches, shared between the BBC and ITV network. All games were shown in a highlights format, except the Final, which was shown live both on BBC1 and ITV. The BBC football highlights programme Match of the Day would show up to three games and the various ITV regional network stations would cover up to one game and show highlights from other games covered elsewhere on the ITV network. No games from Rounds 1 or 2 were shown. Occasional highlights of replays would be shown on either the BBC or ITV.[1][2][3][4][5][6][7][8]
This was the first season of a 4-year deal between the FA/Football League and BBC/ITV where BBC and ITV would alternate between Saturday nights and Sunday afternoons for highlights. This season it was as it was under the previous contracts from 1964 to 1979 Saturday nights BBC1 and Sunday afternoons ITV.