| City | Rank | 2026 Pop. ↓ | 2020 Pop. | Annual Change | Density (/mi²) | Area (mi²) | Type |
|---|---|---|---|---|---|---|---|
| Sullivan | 1 | 4,290 | 4,397 | -0.46% | 1,549 | 3 | City |
| Bethany | 2 | 1,188 | 1,250 | -1% | 1,216 | 1 | Village |
| Lovington | 3 | 1,000 | 1,062 | -0.99% | 1,838 | 1 | Village |
| Dalton City | 4 | 427 | 455 | -1.16% | 800 | 1 | Village |
| Gays | 5 | 209 | 223 | -1.42% | 541 | 0 | Village |
Sullivan is the largest city in Moultrie County, with a population of 4,290.
Gays is the smallest city in Moultrie County, with a population of 209.
There are 5 cities in Moultrie County, Illinois.