14 cities
| City | Rank | 2026 Pop. ↓ | 2020 Pop. | Annual Change | Density | Area (mi²) | Type |
|---|---|---|---|---|---|---|---|
| Coeur d'Alene | 1 | 58,555 | 54,954 | 1.04% | 3,471 | 17 | City |
| Post Falls | 2 | 49,048 | 39,304 | 3.42% | 2,560 | 19 | City |
| Hayden | 3 | 17,561 | 15,650 | 1.85% | 1,668 | 11 | City |
| Rathdrum | 4 | 14,293 | 9,291 | 6.2% | 2,055 | 7 | City |
| Spirit Lake | 5 | 2,524 | 2,346 | 1.2% | 1,028 | 2 | City |
| Dalton Gardens | 6 | 2,477 | 2,539 | -0.4% | 1,040 | 2 | City |
| Hauser | 7 | 959 | 764 | 3.56% | 791 | 1 | City |
| Athol | 8 | 752 | 709 | 0.94% | 663 | 1 | City |
| Hayden Lake | 9 | 680 | 656 | 0.59% | 1,113 | 1 | City |
| Worley | 10 | 248 | 254 | -0.4% | 1,278 | 0 | City |
| Harrison | 11 | 219 | 231 | -0.9% | 61 | 4 | City |
| Fernan Lake Village | 12 | 157 | 166 | -0.63% | 2,066 | 0 | City |
| Huetter | 13 | 106 | 100 | 0.95% | 2,356 | 0 | City |
| State Line | 14 | 38 | 37 | 0% | 345 | 0 | City |
Coeur d'Alene is the largest city in Kootenai County, with a population of 58,555.
State Line is the smallest city in Kootenai County, with a population of 38.
There are 14 cities in Kootenai County, Idaho.