| Election Name: | 1931 Wellington City mayoral election |
| Country: | New Zealand |
| Flag Image: | Wellington Coat Of Arms.svg |
| Type: | Presidential |
| Ongoing: | no |
| Previous Election: | 1929 Wellington City mayoral election |
| Previous Year: | 1929 |
| Next Election: | 1933 Wellington City mayoral election |
| Next Year: | 1933 |
| Election Date: | 8 May 1931 |
| Turnout: | 25,799 (56.20%) |
| Candidate1: | Thomas Hislop |
| Party1: | Civic League |
| Popular Vote1: | 13,593 |
| Percentage1: | 52.68 |
| Candidate2: | Martin Luckie |
| Party2: | Independent politician |
| Popular Vote2: | 11,678 |
| Percentage2: | 45.26 |
| Mayor | |
| Before Election: | George Troup |
| After Election: | Thomas Hislop |
The 1931 Wellington City mayoral election was part of the New Zealand local elections held that same year. In 1931, elections were held for the Mayor of Wellington plus other local government positions including fifteen city councillors. The polling was conducted using the standard first-past-the-post electoral method.
Mayor George Troup declined to stand for a third term. Councillor Thomas Hislop was selected as his replacement to stand for the Civic League. The Labour Party did not stand a mayoral candidate, the first time they had not done so since 1917. An election was necessitated when the deputy mayor Martin Luckie accepted the request of a deputation of citizens to run for mayor.[1]