Richmond County is a county located on the Northern Neck in the U.S. state of Virginia. As of the 2020 census, the population sits at 8,923. Its county seat is Warsaw. The rural county should not be confused with the large city and state capital Richmond, Virginia. It was formed in 1692 when the first Rappahannock County was divided to form Richmond County and Essex County.

The Northern Neck is the northernmost of three peninsulas on the western shore of the Chesapeake Bay in the Commonwealth of Virginia(along with the Middle Peninsula and the Virginia Peninsula). The Potomac River forms the northern boundary of the peninsula; the Rappahannock River demarcates it on the south. The land between these rivers was formed into Northumberland County in 1648, prior to the creation of Westmoreland County and Lancaster County.