Founded in 1890, Pearl River County is one of 82 counties in the state of Mississippi. Historically, Pearl River County was formed from Hancock and Marion Counties. The city of Poplarville is the county seat. With FIPS code of 109, Pearl River County has a population of 56,503 and area of 812 square miles (2,103 km2).
List of all cities in Pearl River County, MS alphabetically
| City/Town | Postal Code | Area Code |
| Barth, MS | 39470 | 601/769 |
| Caesar, MS | 39466 | 601/769 |
| Carriere, MS | 39426 | 601/769 |
| Crossroads, MS | 39470 | 601/769 |
| Cybur, MS | 39466 | 601/769 |
| Derby, MS | 39470 | 601/769 |
| Fords Creek, MS | 39470 | 601/769 |
| Goodyear, MS | 39466 | 601/769 |
| Greenbrier Park, MS | 39466 | 601/769 |
| Henleyfield, MS | 39426 | 601/769 |
| Hillsdale, MS | 39470 | 601/769 |
| Industrial, MS | 39466 | 601/769 |
| McNeill, MS | 39457 | 601/769 |
| Mill Creek, MS | 39426 | 601/769 |
| Nicholson, MS | 39463 | 601/769 |
| Ozona, MS | 39426 | 601/769 |
| Picayune, MS | 39466 | 601/769 |
| Poplarville, MS | 39470 | 601/769 |
| Richardson, MS | 39466 | 601/769 |
| Savannah, MS | 39470 | 601/769 |
| West Poplarville, MS | 39470 | 601/769 |