Onoun's 2026 population is now estimated at 693. In 1980, the population of Onoun was 434. Onoun has grown by 4 in the last year, which represents a 0.58% annual change. These population values and projections come from FSM municipal census series 1980-2010 via CityPopulation official attribution, FSM 2010 state basic tabulations direct municipality totals and World Population Review Internal Projections .
| City | 2026 Pop. ↓ | Growth |
|---|---|---|
| Weno | 13,943 | 0.04% |
| Nett | 7,488 | 0.75% |
| Kitti | 7,286 | 0.75% |
| Palikir | 6,985 | 0.3% |
| Kolonia | 6,760 | 0.67% |
| Madolenihmw | 6,369 | 0.63% |
| U | 4,209 | 1.74% |
| Tol | 3,819 | -1.14% |
| Colonia | 2,987 | -0.3% |
| Dublon | 2,969 | -1.03% |
| Fefen | 2,699 | -1.57% |
| Houk | 2,484 | 5.12% |
| Uman | 2,147 | -1.06% |
| Tafunsak | 1,785 | -1.22% |
| Pollap | 1,756 | 2.57% |
| Tomil | 1,655 | 1.85% |
| Lelu | 1,615 | -1.76% |
| Udot | 1,540 | -0.52% |
| Ettal | 1,496 | 5.13% |
| Fananu | 1,270 | 5.05% |
| Gagil | 1,118 | 1.64% |
| Moch | 1,072 | 0.94% |
| Polle | 1,068 | -2.11% |
| Ulithi | 980 | 0.93% |
| Malem | 960 | -1.94% |
| Utwe | 862 | -0.81% |
| Nomwin | 854 | 0.71% |
| Woleai | 829 | -1.31% |
| Tamatam | 797 | 3.1% |
| Lekinoch | 735 | -0.94% |
| Onoun | 693 | 0.58% |
| Romanum | 674 | -1.61% |
| Maap | 670 | 0.45% |
| Fanapanges | 658 | -0.15% |
| Ifalik | 606 | 0.33% |
| Paata | 497 | -4.97% |
| Satawal | 457 | -0.44% |
| Fanif | 454 | -0.66% |
| Polowat | 454 | -3.2% |
| Satowan | 414 | -3.04% |
| Nema | 364 | -3.96% |
| Wonei | 287 | -4.65% |