1990–91 FA Cup Fourth Round Proper Fourth Round Proper

| Tie_no | Home_team | Score | Away_team | Date_ |
|---|---|---|---|---|
| 11 | Manchester United | 1–0 | Bolton Wanderers | 26/01/1991 |
| 12 | Norwich City | 3–1 | Swindon Town | 26/01/1991 |
| 13 | Millwall | 4–4 | Sheffield Wednesday | 26/01/1991 |
| Replay | Sheffield Wednesday | 2–0 | Millwall | 30/01/1991 |
| 14 | Port Vale | 1–2 | Manchester City | 26/01/1991 |
| 15 | Arsenal | 0–0 | Leeds United | 27/01/1991 |
| Replay | Leeds United | 1–1 | Arsenal | 30/01/1991 |
| Replay | Arsenal | 0–0 | Leeds United | 13/02/1991 |
| Replay | Leeds United | 1–2 | Arsenal | 16/02/1991 |
| 16 | Cambridge United | 2–0 | Middlesbrough | 26/01/1991 |