Founded on October 17, 1828, Washington County is one of 75 counties in the state of Arkansas. Historically, Washington County was formed from Lovely County. The city of Fayetteville is the county seat. With FIPS code of 143, Washington County has a population of 250,057 and area of 951.72 square miles (2,465 km2).
List of all cities in Washington County, AR alphabetically
| City/Town | Postal Code | Area Code |
| Bethel Heights, AR | 72764 | 479 |
| Canehill, AR | 72717 | 479 |
| Elkins, AR | 72727 | 479 |
| Elm Springs, AR | 72728 | 479 |
| Evansville, AR | 72729 | 479 |
| Farmington, AR | 72730 | 479 |
| Fayetteville, AR | 72701 | 479 |
| 72702 | 479 | |
| 72703 | 479 | |
| 72704 | 479 | |
| 72730 | 479 | |
| 72764 | 479 | |
| Goshen, AR | 72735 | 479 |
| Greenland, AR | 72737 | 479 |
| Johnson, AR | 72741 | 479 |
| Lincoln, AR | 72744 | 479 |
| Morrow, AR | 72749 | 479 |
| Prairie Grove, AR | 72753 | 479 |
| Springdale, AR | 72762 | 479 |
| 72764 | 479 | |
| 72765 | 479 | |
| 72766 | 479 | |
| Summers, AR | 72769 | 479 |
| Tontitown, AR | 72770 | 479 |
| West Fork, AR | 72774 | 479 |
| Wheeler, AR | 72704 | 479 |
| Winslow, AR | 72959 | 479 |
Map of Cities in Washington County, AR
