7 cities
| City | Rank | 2026 Pop. ↓ | 2020 Pop. | Annual Change | Density | Area (mi²) | Type |
|---|---|---|---|---|---|---|---|
| Mounds | 1 | 585 | 653 | -1.85% | 485 | 1 | City |
| Mound City | 2 | 461 | 520 | -2.12% | 683 | 1 | City |
| Ullin | 3 | 450 | 479 | -1.1% | 160 | 3 | Village |
| Karnak | 4 | 392 | 425 | -1.26% | 217 | 2 | Village |
| Olmsted | 5 | 258 | 284 | -1.53% | 77 | 3 | Village |
| Pulaski | 6 | 138 | 153 | -1.43% | 105 | 1 | Village |
| Mill Creek | 7 | 55 | 58 | 0% | 146 | 0 | Village |
Mounds is the largest city in Pulaski County, with a population of 585.
Mill Creek is the smallest city in Pulaski County, with a population of 55.
There are 7 cities in Pulaski County, Illinois.