| City Cup | |
| Year: | 1903–04 |
| Country: |  Ireland |
| Num Teams: | 6 |
| Defending Champions: | Linfield |
| Winners: | Linfield (8th win) |
| Second: | Distillery |
| Matches: | 28 |
| Goals: | 101 |
| Prev Season: | 1902–03 |
| Next Season: | 1904–05 |
The 1903–04 City Cup was the tenth edition of the City Cup, a cup competition in Irish football.[1]
The tournament was won by Linfield for the eighth time and fifth consecutive year.[2] [3]