1979–80 FA Cup Third round proper Third round proper

| Tie_no | Home_team | Score | Away_team | Date_ |
|---|---|---|---|---|
| 19 | Bristol Rovers | 1–2 | Aston Villa | 4 January 1980 |
| 20 | Portsmouth | 1–1 | Middlesbrough | 9 January 1980 |
| Replay | Middlesbrough | 3–0 | Portsmouth | 14 January 1980 |
| 21 | Millwall | 5–1 | Shrewsbury Town | 5 January 1980 |
| 22 | Carlisle United | 3–2 | Bradford City | 5 January 1980 |
| 23 | Oldham Athletic | 0–1 | Coventry City | 5 January 1980 |
| 24 | Chelsea | 0–1 | Wigan Athletic | 14 January 1980 |
| 25 | Altrincham | 1–1 | Orient | 5 January 1980 |
| Replay | Orient | 2–1 | Altrincham | 9 January 1980 |
| 26 | Mansfield Town | 0–2 | Brighton & Hove Albion | 5 January 1980 |
| 27 | Cardiff City | 0–0 | Arsenal | 5 January 1980 |
| Replay | Arsenal | 2–1 | Cardiff City | 8 January 1980 |
| 28 | Halifax Town | 1–0 | Manchester City | 5 January 1980 |