1931 Chatham Cup
| Tournament details | |
|---|---|
| City | Wellington |
| Venue(s) | Basin Reserve |
| Dates | 12 September 1931 |
| Teams | 31 |
| Defending champions | Petone FC |
| Final positions | |
| Champions | Tramurewa (1st title) |
| Runners-up | Nomads |
The 1931 Chatham Cup was the ninth annual nationwide knockout football competition in New Zealand.
The competition was run on a regional basis, with six regional associations (Auckland, Walkato, Wellington, Manawatu, Canterbury, and Otago) each holding separate qualifying rounds. In all, 30 teams took part in the competition, though some reports suggest there may have been 31 teams, and for the first time the majority came from the South Island. This was an improvements over previous years, but still a tiny number considering that 514 teams were affiliated to the regional associations nationwide. Participation by Auckland teams was particularly poor, with only three sides from that city taking part.