14 cities
| City | Rank | 2026 Pop. ↓ | 2020 Pop. | Annual Change | Density | Area (mi²) | Type |
|---|---|---|---|---|---|---|---|
| Sullivan | 1 | 6,289 | 6,282 | 0.61% | 106 | 59 | Township |
| Sullivan | 2 | 4,246 | 4,401 | -0.61% | 1,533 | 3 | City |
| Lowe | 3 | 1,766 | 1,743 | 0.23% | 43 | 41 | Township |
| Marrowbone | 4 | 1,559 | 1,610 | -0.19% | 40 | 39 | Township |
| Lovington | 5 | 1,516 | 1,556 | -0.2% | 29 | 52 | Township |
| Bethany | 6 | 1,172 | 1,250 | -1.1% | 1,200 | 1 | Village |
| Jonathan Creek | 7 | 1,038 | 1,018 | 0.19% | 28 | 37 | Township |
| East Nelson | 8 | 1,005 | 994 | 0.1% | 28 | 36 | Township |
| Lovington | 9 | 999 | 1,062 | -0.99% | 1,836 | 1 | Village |
| Dora | 10 | 681 | 699 | -0.15% | 19 | 35 | Township |
| Sullivan | 11 | 645 | 656 | 0.16% | 16 | 41 | Township |
| Whitley | 12 | 587 | 590 | 0% | 16 | 37 | Township |
| Dalton City | 13 | 426 | 456 | -1.16% | 798 | 1 | Village |
| Gays | 14 | 206 | 221 | -0.96% | 534 | 0 | Village |
Sullivan is the largest city in Moultrie County, with a population of 6,289.
Gays is the smallest city in Moultrie County, with a population of 206.
There are 14 cities in Moultrie County, Illinois.