Dinwiddie County, Virginia

Dinwiddie County, Virginia
Location within the U.S. state of Virginia
Coordinates: 37°05′N 77°38′W / 37.08°N 77.63°W / 37.08; -77.63
Country United States
State Virginia
Founded1752
Named afterRobert Dinwiddie
SeatDinwiddie
Largest townMcKenney
Area
 • Total
507 sq mi (1,310 km2)
 • Land504 sq mi (1,310 km2)
 • Water3.5 sq mi (9.1 km2)  0.7%
Population
 (2020)
 • Total
27,947
 • Estimate 
(2024)
28,576
 • Density55.5/sq mi (21.4/km2)
Time zoneUTC−5 (Eastern)
 • Summer (DST)UTC−4 (EDT)
Congressional district4th
Websitewww.dinwiddieva.us

Dinwiddie County is a largely rural United States county located in the south-central part of the Commonwealth of Virginia. Dinwiddie forms part of the Greater Richmond metropolitan statistical area, and as of the 2020 census, the county's population was 27,947. The county seat is the small town of Dinwiddie, which shares the county's name.

The county was established in 1752 from part of Prince George County and was named in honor of Robert Dinwiddie, the de facto head of the Virginia colony at the time. Agriculture has historically played an important role in the county's economy. Dinwiddie's close proximity to the city of Petersburg and its railroad lines led to the county hosting six notable Civil War battles.