Dinwiddie can refer to:
- Dinwiddie County, Virginia, a county in Virginia, United States
- Dinwiddie, Virginia, the county seat of Dinwiddie County
- Battle of Dinwiddie Court House, a minor engagement in the American Civil War
- Dinwiddie, Indiana
People with the last name Dinwiddie include:
- Marcus Dinwiddie, an American sport shooter
- Robert Dinwiddie (1693-1770), British lieutenant governor of colonial Virginia
- Robert Dinwiddie (golfer), an English professional golfer
- Ryan Dinwiddie, a professional Canadian football quarterback
- Traci Dinwiddie, an American film and television actress