Founded in March 3, 1852, Washington County is one of 29 counties in the state of Utah. Historically, Washington County was formed from Original county of Territory of Utah. The city of St. George is the county seat. With FIPS code of 53, Washington County has a population of 191,226 and area of 2,426 square miles (6,283 km2).
List of all cities in Washington County, UT alphabetically
| City/Town | Postal Code | Area Code |
| Apple Valley, UT | 84737 | 435 |
| Bloomington, UT | 84790 | 435 |
| Bloomington Hills, UT | 84790 | 435 |
| Brookside, UT | 84782 | 435 |
| Central, UT | 84722 | 435 |
| Dammeron, UT | 84783 | 435 |
| Dammeron Valley, UT | 84783 | 435 |
| Diamond Valley, UT | 84770 | 435 |
| Enterprise, UT | 84725 | 435 |
| Gunlock, UT | 84733 | 435 |
| Harrisburg Junction, UT | 84770 | 435 |
| Hildale, UT | 84784 | 435 |
| Hurricane, UT | 84737 | 435 |
| Ivins, UT | 84738 | 435 |
| Kayenta, UT | 84738 | 435 |
| La Verkin, UT | 84745 | 435 |
| Leeds, UT | 84746 | 435 |
| Middleton, UT | 84770 | 435 |
| New Harmony, UT | 84757 | 435 |
| Pine Valley, UT | 84781 | 435 |
| Rockville, UT | 84763 | 435 |
| Saint George, UT | 84770 | 435 |
| 84771 | 435 | |
| 84782 | 435 | |
| 84783 | 435 | |
| 84790 | 435 | |
| 84791 | 435 | |
| Santa Clara, UT | 84765 | 435 |
| Springdale, UT | 84767 | 435 |
| 84779 | 435 | |
| Toquerville, UT | 84774 | 435 |
| Veyo, UT | 84782 | 435 |
| Virgin, UT | 84779 | 435 |
| Washington, UT | 84780 | 435 |
| Winchester Hills, UT | 84770 | 435 |
| Zion National Park, UT | 84767 | 435 |