Dinwiddie County was established May 1, 1752 from Prince George County. The county is named for Robert Dinwiddie, Lieutenant Governor of Virginia, 1751-58. However the first inhabitants of the area were in fact Paleo Indians, prior to 8000BC. Who are believed to have been nomadic hunter-gatherers following of animal migrations. Early stone tools have been discovered in various fields within the county. The county raise several militia units that would fight in the American Revolution.

The Dinwiddie County Historical Society currently occupies the old historic Dinwiddie County Court House.