| City | Rank | 2026 Pop. ↓ | 2020 Pop. | Annual Change | Density (/mi²) | Area (mi²) | Type |
|---|---|---|---|---|---|---|---|
| Coeur d'Alene | 1 | 58,785 | 54,951 | 1.04% | 3,485 | 17 | City |
| Post Falls | 2 | 48,338 | 39,320 | 3.47% | 2,523 | 19 | City |
| Hayden | 3 | 17,682 | 15,653 | 1.84% | 1,679 | 11 | City |
| Rathdrum | 4 | 14,058 | 9,289 | 6.28% | 2,022 | 7 | City |
| Spirit Lake | 5 | 2,516 | 2,348 | 1.25% | 1,024 | 2 | City |
| Dalton Gardens | 6 | 2,485 | 2,538 | -0.44% | 1,043 | 2 | City |
| Hauser | 7 | 947 | 766 | 3.5% | 781 | 1 | City |
| Athol | 8 | 745 | 699 | 0.95% | 656 | 1 | City |
| Hayden Lake | 9 | 672 | 651 | 0.6% | 1,100 | 1 | City |
| Worley | 10 | 247 | 252 | -0.4% | 1,273 | 0 | City |
| Harrison | 11 | 219 | 231 | -1.35% | 61 | 4 | City |
| Fernan Lake Village | 12 | 161 | 169 | -1.23% | 2,118 | 0 | City |
| Huetter | 13 | 106 | 99 | 0.95% | 2,356 | 0 | City |
| State Line | 14 | 38 | 35 | 0% | 345 | 0 | City |
Coeur d'Alene is the largest city in Kootenai County, with a population of 58,785.
State Line is the smallest city in Kootenai County, with a population of 38.
There are 14 cities in Kootenai County, Idaho.