Penrhyn's 2026 population is now estimated at 230. In 2021, the population of Penrhyn was 230. These population values and projections come from Cook Islands CISO Census 2021 Table 1.05 resident population by usual residence and World Population Review Internal Projections .
| City | 2026 Pop. ↓ | Growth |
|---|---|---|
| Aitutaki | 1,776 | 0% |
| Kiikii-Tupapa-Maraerenga | 1,749 | 0% |
| Nikao-Panama | 1,487 | 0% |
| Titikaveka | 1,276 | 0% |
| Ruaau-Arerenga | 1,199 | 0% |
| Matavera | 1,018 | 0% |
| Avatiu-Ruatonga-Atupa | 974 | 0% |
| Avarua | 974 | 0% |
| Ngatangiia | 795 | 0% |
| Murienua | 794 | 0% |
| Akaoa-Betela | 668 | 0% |
| Takuvaine | 629 | 0% |
| Mangaia | 471 | 0% |
| Pukapuka | 456 | 0% |
| Atiu | 382 | 0% |
| Tutakimoa-Teotue | 274 | 0% |
| Mauke | 249 | 0% |
| Penrhyn | 230 | 0% |
| Manihiki | 207 | 0% |
| Mitiaro | 155 | 0% |
| Nassau | 92 | 0% |
| Rakahanga | 81 | 0% |
| Palmerston | 25 | 0% |