| Election Name: | 2017 Avatiu–Ruatonga–Palmerston by-election |
| Next Year: | 2018 |
| MP | |
| Type: | presidential |
| Country: | Cook Islands |
| Ongoing: | No |
| Election Date: | 17 May 2017 |
| Previous Election: | 2014 Cook Islands general election |
| Next Election: | 2018 Cook Islands general election |
| Previous Year: | 2014 |
| Nominee1: | Albert Nicholas |
| Party1: | Cook Islands Party |
| Popular Vote1: | 346 |
| Percentage1: | 62.34% |
| Nominee2: | Teina Rongo |
| Party2: | Democratic Party (Cook Islands) |
| Popular Vote2: | 182 |
| Percentage2: | 32.79% |
| Before Election: | Albert Nicholas |
| Before Party: | Cook Islands Party |
| After Election: | Albert Nicholas |
| After Party: | Cook Islands Party |
A by-election was held in the Cook Islands constituency of Avatiu–Ruatonga–Palmerston on 17 May 2017. The by-election was precipitated by the resignation of Albert Nicholas. It was won by Albert Nicholas.[1]
In the July 2014 general election the contest for Avatiu–Ruatonga–Palmerston (or "RAPPA") saw sitting Cook Islands Party MP John Henry unseated by the Democratic Party challenger Albert Nicholas. Following the election, Nicholas switched his support to the government of Henry Puna in exchange for a position in cabinet.[2] He was subsequently expelled from the Democratic Party.[3] Continued controversy about the ethics of "vaka-jumping" saw him resign his seat in April 2017 in an effort to gain a new mandate.[4]
Nicholas was selected as the Cook Islands Party candidate, a decision which saw former CIP candidate John Henry run as an independent.[5] The Democrats selected Teina Rongo, a former public servant.
The election was won by Albert Nicholas.[1]