16 cities
| City | Rank | 2025 Pop. ↓ | 2020 Pop. | Change | Density | Area (mi²) | Type |
|---|---|---|---|---|---|---|---|
| Coeur | 1 | 58,195 | 54,942 | 1.13% | 3,611 | 16.11 | City |
| Post Falls | 2 | 48,494 | 39,253 | 3.96% | 2,615 | 18.55 | City |
| Hayden | 3 | 16,935 | 15,652 | 1.54% | 1,608 | 10.53 | City |
| Rathdrum | 4 | 13,107 | 9,289 | 6.19% | 1,885 | 6.95 | City |
| Spirit Lake | 5 | 2,566 | 2,348 | 1.75% | 1,045 | 2.46 | City |
| Dalton Gardens | 6 | 2,495 | 2,539 | -0.36% | 1,047 | 2.38 | City |
| Hauser | 7 | 924 | 766 | 3.59% | 762 | 1.21 | City |
| Athol | 8 | 750 | 709 | 1.08% | 661 | 1.14 | City |
| Hayden Lake | 9 | 679 | 653 | 0.74% | 1,111 | 0.61 | City |
| Rockford Bay | 10 | 337 | 355 | 3.37% | 89 | 3.77 | CDP |
| Worley | 11 | 245 | 254 | -0.81% | 1,263 | 0.19 | City |
| Harrison | 12 | 221 | 231 | -0.9% | 62 | 3.56 | City |
| Conkling Park | 13 | 163 | 128 | 7.24% | 156 | 1.04 | CDP |
| Fernan Lake Village | 14 | 158 | 167 | -1.25% | 2,079 | 0.08 | City |
| Huetter | 15 | 104 | 99 | 0.97% | 2,311 | 0.04 | City |
| State Line | 16 | 37 | 36 | 0% | 336 | 0.11 | City |
Coeur is the largest city in Kootenai County, with a population of 58,195.
State Line is the smallest city in Kootenai County.
There are 16 cities in Kootenai County, Idaho.