Founded in 1839, Menard County is one of 102 counties in the state of Illinois. Historically, Menard County was formed from Sangamon County. The city of Petersburg is the county seat. With FIPS code of 129, Menard County has a population of 12,164 and area of 314 square miles (813 km2).
List of all cities in Menard County, IL alphabetically
| City/Town | Postal Code | Area Code |
| Athens, IL | 62613 | 217 |
| Atterberry, IL | 62675 | 217 |
| Atterbury, IL | 62675 | 217 |
| Fancy Prairie, IL | 62613 | 217 |
| Greenview, IL | 62642 | 217 |
| Hubly, IL | 62642 | 217 |
| Lincolns New Salem, IL | 62659 | 217 |
| Oakford, IL | 62673 | 217 |
| Petersburg, IL | 62675 | 217 |
| Sweet Water, IL | 62642 | 217 |
| Tallula, IL | 62688 | 217 |
| Tice, IL | 62675 | 217 |