Founded in 1824, Simpson County is one of 82 counties in the state of Mississippi. Historically, Simpson County was formed from Copiah County. The city of Mendenhall is the county seat. With FIPS code of 127, Simpson County has a population of 25,750 and area of 589 square miles (1,526 km2).
List of all cities in Simpson County, MS alphabetically
| City/Town | Postal Code | Area Code |
| Braxton, MS | 39044 | 601/769 |
| D’ LO, MS | 39062 | 601/769 |
| Harrisville, MS | 39082 | 601/769 |
| Magee, MS | 39111 | 601/769 |
| McGee, MS | 39111 | 601/769 |
| Mendenhall, MS | 39114 | 601/769 |
| Pinola, MS | 39149 | 601/769 |
| Sanatorium, MS | 39111 | 601/769 |
| Shivers, MS | 39149 | 601/769 |