8 cities
| City | Rank | 2026 Pop. ↓ | 2020 Pop. | Annual Change | Density | Area (mi²) | Type |
|---|---|---|---|---|---|---|---|
| Clinton | 1 | 6,835 | 6,972 | -0.34% | 1,929 | 4 | City |
| Farmer City | 2 | 1,811 | 1,828 | -0.17% | 756 | 2 | City |
| McLean | 3 | 733 | 741 | -0.14% | 623 | 1 | Village |
| Wapella | 4 | 499 | 511 | -0.4% | 906 | 1 | Village |
| Waynesville | 5 | 374 | 379 | -0.27% | 1,172 | 0 | Village |
| Weldon | 6 | 358 | 361 | 0% | 1,341 | 0 | Village |
| Kenney | 7 | 306 | 305 | 0% | 1,085 | 0 | Village |
| De Witt | 8 | 166 | 162 | 0.61% | 700 | 0 | Village |
Clinton is the largest city in De Witt County, with a population of 6,835.
De Witt is the smallest city in De Witt County, with a population of 166.
There are 8 cities in De Witt County, Illinois.