7 cities
| City | Rank | 2025 Pop. ↓ | 2020 Pop. | Annual Change | Density | Area (mi²) | Type |
|---|---|---|---|---|---|---|---|
| Mounds | 1 | 596 | 653 | -1.97% | 494 | 1 | City |
| Mound City | 2 | 471 | 520 | -2.08% | 698 | 1 | City |
| Ullin | 3 | 455 | 479 | -1.09% | 162 | 3 | Village |
| Karnak | 4 | 397 | 425 | -1.49% | 220 | 2 | Village |
| Olmsted | 5 | 262 | 284 | -1.87% | 78 | 3 | Village |
| Pulaski | 6 | 140 | 153 | -2.1% | 107 | 1 | Village |
| Mill Creek | 7 | 55 | 58 | -1.79% | 146 | 0 | Village |
Mounds is the largest city in Pulaski County, with a population of 596.
Mill Creek is the smallest city in Pulaski County, with a population of 55.
There are 7 cities in Pulaski County, Illinois.