| Ulster Cup | |
| Year: | 1980–81 |
| Num Teams: | 12 |
| Defending Champions: | Linfield |
| Second: | Linfield |
| Matches: | 66 |
| Goals: | 219 |
| Prev Season: | 1979–80 |
| Next Season: | 1981–82 |
The 1980–81 Ulster Cup was the 33rd edition of the Ulster Cup, a cup competition in Northern Irish football.[1]
Ballymena United won the tournament for the 3rd time, finishing top of the group standings.[2]