| Ulster Cup | |
| Year: | 1955–56 |
| Num Teams: | 12 |
| Defending Champions: | Glenavon |
| Winners: | Linfield (2nd win) |
| Second: | Coleraine |
| Matches: | 31 |
| Goals: | 103 |
| Prev Season: | 1954–55 |
| Next Season: | 1956–57 |
The 1955–56 Ulster Cup was the eighth edition of the Ulster Cup, a cup competition in Northern Irish football.[1]
Linfield won the tournament for the 2nd time, defeating Coleraine 5–1 in the final.[2] [3]