UK Box Office 13th March, 1981
| Title | Weekend | Week | Total | % Change | Total Weeks | ||
| 1 (new) |  | Private Benjamin (1980) | £503,125 | £503,125 | £503,125 | new | 1 |
| 2 (1) |  | Ordinary People (1981) | £456,391 | £593,308 | £1,106,090 | -11% | 2 |
| 3 (2) |  | Raging Bull (1981) | £25,612 | £37,137 | £687,384 | -49% | 4 |
| 4 (3) |  | Battle Beyond the Stars (1981) | £20,399 | £29,579 | £326,863 | -47% | 4 |
| 5 (4) |  | Flash Gordon (1980) | £14,339 | £18,641 | £8,827,867 | -58% | 14 |