25 cities
| City | Rank | 2025 Pop. ↓ | 2020 Pop. | Change | Density | Area (mi²) | Type |
|---|---|---|---|---|---|---|---|
| Kapaa | 1 | 10,883 | 9,961 | 0.12% | 1,085 | 10.03 | CDP |
| Waimea | 2 | 10,770 | 10,969 | 0.98% | 273 | 39.38 | CDP |
| Lihue | 3 | 9,198 | 9,036 | 2.03% | 1,233 | 7.46 | CDP |
| Wailua Homesteads | 4 | 7,689 | 6,301 | 2.22% | 1,052 | 7.31 | CDP |
| Hanamaulu | 5 | 4,826 | 4,689 | 1.39% | 3,794 | 1.27 | CDP |
| Kalaheo | 6 | 4,665 | 5,333 | 0.11% | 1,333 | 3.50 | CDP |
| Puhi | 7 | 4,225 | 4,316 | 2.13% | 4,753 | 0.89 | CDP |
| Kilauea | 8 | 3,532 | 2,879 | 1.41% | 711 | 4.97 | CDP |
| Kekaha | 9 | 3,052 | 3,246 | -1.04% | 3,182 | 0.96 | CDP |
| Lawai | 10 | 3,037 | 2,497 | 1.5% | 748 | 4.06 | CDP |
| Anahola | 11 | 3,010 | 2,425 | 1.76% | 817 | 3.69 | CDP |
| Wailua | 12 | 2,484 | 2,481 | 0.61% | 1,617 | 1.54 | CDP |
| Koloa | 13 | 2,315 | 2,448 | 0.48% | 1,852 | 1.25 | CDP |
| Eleele | 14 | 2,221 | 2,710 | -0.49% | 2,888 | 0.77 | CDP |
| Hanapepe | 15 | 2,143 | 2,763 | -1.52% | 2,294 | 0.93 | CDP |
| Waimea | 16 | 1,975 | 1,682 | 0.41% | 1,065 | 1.85 | CDP |
| Princeville | 17 | 1,969 | 1,918 | -0.66% | 757 | 2.60 | CDP |
| Kaumakani | 18 | 1,685 | 1,148 | 3.82% | 1,776 | 0.95 | CDP |
| Omao | 19 | 1,442 | 1,495 | 0.63% | 1,137 | 1.27 | CDP |
| Poipu | 20 | 1,111 | 1,005 | 0.73% | 429 | 2.59 | CDP |
| Haena | 21 | 518 | 201 | 0.97% | 357 | 1.45 | CDP |
| Pakala Village | 22 | 313 | 454 | 0.32% | 131 | 2.40 | CDP |
| Hanalei | 23 | 262 | 408 | -4.73% | 387 | 0.68 | CDP |
| Kalihiwai | 24 | 213 | 286 | -6.17% | 81 | 2.64 | CDP |
| Wainiha | 25 | 83 | 197 | -16.16% | 34 | 2.46 | CDP |
Kapaa is the largest city in Kauai County, with a population of 10,883.
Wainiha is the smallest city in Kauai County.
There are 25 cities in Kauai County, Hawaii.