Founded in 1827, Perry County is one of 102 counties in the state of Illinois. Historically, Perry County was formed from Randolph and Jackson County. The city of Pinckneyville is the county seat. With FIPS code of 145, Perry County has a population of 20,985 and area of 441 square miles (1,142 km2).
List of all cities in Perry County, IL alphabetically
| City/Town | Postal Code | Area Code |
| Conant, IL | 62274 | 618/730 |
| Cutler, IL | 62238 | 618/730 |
| Du Quoin, IL | 62832 | 618/730 |
| Pinckneyville, IL | 62274 | 618/730 |
| Tamaroa, IL | 62888 | 618/730 |
| Willisville, IL | 62997 | 618/730 |