United States of America
- Sullivan, the county seat of Moultrie County, Illinois
- Sullivan, the county seat of Sullivan County, Indiana
- Sullivan, a city in Hancock County, Maine
- Sullivan, Muskegon County Township, Michigan
- Sullivan, a city in Franklin County, Missouri
- Sullivan, a city in Cheshire County, New Hampshire
- Sullivan, city in Madison County, New York
- Sullivan, township of Tioga County, Pennsylvania
- Sullivan, a city in Jefferson County, Wisconsin
- Sullivan City, city of Hidalgo County, Texas