5 cities
| City | Rank | 2025 Pop. ↓ | 2020 Pop. | Change | Density | Area (mi²) | Type |
|---|---|---|---|---|---|---|---|
| Petersburg | 1 | 2,155 | 2,260 | -0.97% | 1,380 | 1.56 | City |
| Athens | 2 | 1,865 | 1,970 | -1.11% | 1,107 | 1.68 | City |
| Greenview | 3 | 705 | 745 | -1.12% | 821 | 0.86 | Village |
| Tallula | 4 | 416 | 433 | -0.72% | 783 | 0.53 | Village |
| Oakford | 5 | 226 | 235 | -0.88% | 908 | 0.25 | Village |
Petersburg is the largest city in Menard County, with a population of 2,155.
Oakford is the smallest city in Menard County.
There are 5 cities in Menard County, Illinois.