| County Antrim Shield | |
| Year: | 1930–31 |
| Num Teams: | 11 |
| Defending Champions: | Linfield |
| Winners: | Glentoran (8th win) |
| Second: | Cliftonville |
| Matches: | 12 |
| Goals: | 53 |
| Prev Season: | 1929–30 |
| Next Season: | 1931–32 |
The 1930–31 County Antrim Shield was the 42nd edition of the County Antrim Shield, a cup competition in Northern Irish football.[1]
Glentoran won the tournament for the 8th time, defeating Cliftonville 2–1 in the final at Grosvenor Park.[2] [3]
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