| Tournament details | |
|---|---|
| City | Wellington |
| Venue(s) | Basin Reserve |
| Dates | 12 September 1931 |
| Teams | 31 |
| Defending champions | Petone FC |
| Final positions | |
| Champions | Tramurewa (1st title) |
| Runner-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,[1] though some reports suggest there may have been 31 teams,[2] 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.[3] Participation by Auckland teams was particularly poor, with only three sides from that city taking part.