Founded in 1742, Louisa County is one of 95 counties in the state of Virginia. Historically, Louisa County was formed from Hanover County. The city of Louisa is the county seat. With FIPS code of 109, Louisa County has a population of 38,848 and area of 498 square miles (1,290 km2).
List of all cities in Louisa County, VA alphabetically
| City/Town | Postal Code | Area Code |
| Bumpass, VA | 23024 | 540 |
| Louisa, VA | 23093 | 540 |
| Mineral, VA | 23117 | 540 |
| Trevilians, VA | 23170 | 540 |