| Ulster Cup | |
| Year: | 1979–80 |
| Num Teams: | 12 |
| Defending Champions: | Linfield |
| Winners: | Linfield (13th win) |
| Second: | Cliftonville |
| Matches: | 66 |
| Goals: | 211 |
| Prev Season: | 1978–79 |
| Next Season: | 1980–81 |
The 1979–80 Ulster Cup was the 32nd edition of the Ulster Cup, a cup competition in Northern Irish football.[1]
Linfield won the tournament for the 13th time and 3rd consecutive season, finishing top of the group standings.[2]