| City | Rank | 2026 Pop. ↓ | 2020 Pop. | Annual Change | Density (/mi²) | Area (mi²) | Type |
|---|---|---|---|---|---|---|---|
| Warsaw | 1 | 16,212 | 15,811 | 0.51% | 1,197 | 14 | City |
| Winona Lake | 2 | 5,136 | 5,058 | 0.2% | 1,741 | 3 | Town |
| Syracuse | 3 | 3,236 | 3,236 | -0.06% | 1,462 | 2 | Town |
| Milford | 4 | 1,686 | 1,681 | 0% | 1,161 | 1 | Town |
| North Webster | 5 | 1,002 | 992 | 0.1% | 1,239 | 1 | Town |
| Pierceton | 6 | 934 | 933 | 0% | 748 | 1 | Town |
| Mentone | 7 | 918 | 943 | -0.54% | 1,575 | 1 | Town |
| Silver Lake | 8 | 875 | 870 | 0% | 1,614 | 1 | Town |
| Etna Green | 9 | 578 | 565 | 0.35% | 1,154 | 1 | Town |
| Leesburg | 10 | 550 | 550 | 0% | 2,148 | 0 | Town |
| Claypool | 11 | 395 | 395 | -0.25% | 1,619 | 0 | Town |
| Sidney | 12 | 127 | 132 | -0.78% | 1,008 | 0 | Town |
| Burket | 13 | 121 | 122 | 0% | 1,704 | 0 | Town |
Warsaw is the largest city in Kosciusko County, with a population of 16,212.
Burket is the smallest city in Kosciusko County, with a population of 121.
There are 13 cities in Kosciusko County, Indiana.