14 cities
| City | Rank | 2025 Pop. ↓ | 2020 Pop. | Change | Density | Area (mi²) | Type |
|---|---|---|---|---|---|---|---|
| Warsaw | 1 | 16,290 | 15,807 | 0.6% | 1,203 | 13.54 | City |
| Winona Lake | 2 | 5,125 | 5,059 | 0.25% | 1,737 | 2.95 | Town |
| Syracuse | 3 | 3,204 | 3,236 | -0.19% | 1,448 | 2.21 | Town |
| Milford | 4 | 1,601 | 1,613 | -0.13% | 1,103 | 1.45 | Town |
| North Webster | 5 | 992 | 996 | -0.1% | 1,226 | 0.81 | Town |
| Pierceton | 6 | 921 | 930 | -0.22% | 738 | 1.25 | Town |
| Mentone | 7 | 908 | 942 | -0.77% | 1,557 | 0.58 | Town |
| Silver Lake | 8 | 865 | 872 | -0.11% | 1,596 | 0.54 | Town |
| Etna Green | 9 | 571 | 566 | 0.18% | 1,140 | 0.50 | Town |
| Leesburg | 10 | 546 | 551 | -0.18% | 2,133 | 0.26 | Town |
| Claypool | 11 | 396 | 398 | 0% | 1,623 | 0.24 | Town |
| Sidney | 12 | 126 | 131 | -0.79% | 1,000 | 0.13 | Town |
| Burket | 13 | 122 | 122 | 0% | 1,718 | 0.07 | Town |
| Milford | 14 | 84 | 0 | 7.69% | 694 | 0.12 | CDP |
Warsaw is the largest city in Kosciusko County, with a population of 16,290.
Milford is the smallest city in Kosciusko County.
There are 14 cities in Kosciusko County, Indiana.