Founded in 1827, Washington County is one of 82 counties in the state of Mississippi. Historically, Washington County was formed from Warren and Yazoo Counties. The city of Greenville is the county seat. With FIPS code of 151, Washington County has a population of 43,687 and area of 724 square miles (1,875 km2).
List of all cities in Washington County, MS alphabetically
| City/Town | Postal Code | Area Code |
| Arcola, MS | 38722 | 662 |
| Avon, MS | 38723 | 662 |
| Bear Garden, MS | 38748 | 662 |
| Bourbon, MS | 38756 | 662 |
| Chatham, MS | 38731 | 662 |
| Crossroads, MS | 38701 | 662 |
| Darlove, MS | 38748 | 662 |
| Dunleith, MS | 38756 | 662 |
| Elizabeth, MS | 38756 | 662 |
| Erwin, MS | 38731 | 662 |
| Estill, MS | 38748 | 662 |
| Foote, MS | 38748 | 662 |
| Glen Allan, MS | 38744 | 662 |
| Greenville, MS | 38701 | 662 |
| 38702 | 662 | |
| 38703 | 662 | |
| 38704 | 662 | |
| 38731 | 662 | |
| Hampton, MS | 38744 | 662 |
| Heads, MS | 38756 | 662 |
| Helm, MS | 38756 | 662 |
| Hollandale, MS | 38748 | 662 |
| James, MS | 38748 | 662 |
| Lamont, MS | 38701 | 662 |
| 38703 | 662 | |
| Leland, MS | 38756 | 662 |
| Long, MS | 38756 | 662 |
| Magenta, MS | 38756 | 662 |
| McCutcheon, MS | 38722 | 662 |
| Metcalfe, MS | 38760 | 662 |
| Murphy, MS | 38748 | 662 |
| Percy, MS | 38748 | 662 |
| Refuge, MS | 38701 | 662 |
| Rexburg, MS | 38756 | 662 |
| Stoneville, MS | 38776 | 662 |
| Swiftwater, MS | 38701 | 662 |
| Valewood, MS | 38744 | 662 |
| Wayside, MS | 38780 | 662 |
| Willet, MS | 38748 | 662 |
| Winterville, MS | 38782 | 662 |