| Election Name: | 1929 Invercargill mayoral election |
| Country: | New Zealand |
| Type: | Presidential |
| Ongoing: | no |
| Previous Election: | 1927 Invercargill mayoral election |
| Previous Year: | 1927 |
| Next Election: | 1931 Invercargill mayoral election |
| Next Year: | 1931 |
| Election Date: | 1 May 1929 |
| Turnout: | 5,232 |
| Candidate1: | John D. Campbell |
| Party1: | Independent politician |
| Popular Vote1: | 3,161 |
| Percentage1: | 60.41 |
| Candidate2: | John Miller |
| Party2: | Independent politician |
| Popular Vote2: | 2,071 |
| Percentage2: | 39.58 |
| Mayor | |
| Before Election: | John Miller |
| After Election: | John D. Campbell |
The 1929 Invercargill mayoral election was part of the New Zealand local elections held that same year. The polling was conducted using the standard first-past-the-post electoral method.
Incumbent mayor John Miller was defeated by councillor John D. Campbell.
The following table gives the election results: