Founded in 1821, Lawrence County is one of 102 counties in the state of Illinois. Historically, Lawrence County was formed from Crawford and Edwards County. The city of Lawrenceville is the county seat. With FIPS code of 101, Lawrence County has a population of 15,152 and area of 372 square miles (963 km2).
List of all cities in Lawrence County, IL alphabetically
| City/Town | Postal Code | Area Code |
| Allison, IL | 62439 | 618/730 |
| Billet, IL | 62439 | 618/730 |
| Bond, IL | 62439 | 618/730 |
| Bridgeport, IL | 62417 | 618/730 |
| Chauncey, IL | 62466 | 618/730 |
| Denison, IL | 62460 | 618/730 |
| Helena, IL | 62466 | 618/730 |
| Lawrence, IL | 62439 | 618/730 |
| Lawrenceville, IL | 62439 | 618/730 |
| Lukin, IL | 62417 | 618/730 |
| Petrolia, IL | 62417 | 618/730 |
| Pinkstaff, IL | 62439 | 618/730 |
| Russelville, IL | 62439 | 618/730 |
| Saint Francisville, IL | 62460 | 618/730 |
| Sand Barrens, IL | 62460 | 618/730 |
| Sumner, IL | 62466 | 618/730 |
| Westport, IL | 62439 | 618/730 |