Westmoreland County is a county located in the Northern Neck of the Commonwealth of Virginia. As of the 2020 census, the population sits at 18,477. Its county seat is Montross.

Cities: Montross, Colonial Beach
Population: 18,712 (2022)
County seat: Montross
Congressional district: 1st
Founded: 1653
Largest town: Colonial Beach
Named for: Westmorland