| Election Name: | 2000 Pukapuka-Nassau by-election |
| Type: | parliamentary |
| Country: | Cook Islands |
| Seats For Election: | Constituency of Pukapuka–Nassau |
| Ongoing: | no |
| Previous Election: | 1999 Pukapuka-Nassau by-election |
| Previous Year: | Sep. 1999 |
| Next Election: | 2004 Cook Islands general election |
| Next Year: | 2014 |
| Election Date: | 29 September 1999 |
| Candidate1: | Tiaki Wuatai |
| Image1: | DP |
| Party1: | Democratic Party (Cook Islands) |
| Popular Vote1: | 210 |
| Percentage1: | 50.5% |
| Candidate2: | Inatio Akaruru |
| Party2: | Cook Islands Party |
| Popular Vote2: | 206 |
| Percentage2: | 49.5% |
| Map Size: | 200px |
| MP | |
| Before Election: | Inatio Akaruru |
| Before Party: | Cook Islands Party |
| After Election: | Te-Hani Brown |
| After Party: | Democratic Party (Cook Islands) |
The 2000 Pukapuka-Nassau by-election was a by-election in the Cook Islands electorate of Pukapuka-Nassau. It took place on 28 September 2000.
The by-election was caused by the invalidation of the 1999 Pukapuka-Nassau by-election.[1] The Cook Islands Parliament subsequently passed an Electoral Amendment Act providing for a second by-election and the re-registration of voters in the electorate.[2] The election was contested by two candidates, and won by the Democratic Alliance Party's Tiaki Wuatai.[3]