Greene County is the name of 14 counties in the United States of America, generally named for the American Revolutionary War general Nathanael Greene:
- Greene County, Alabama
- Greene County, Arkansas
- Greene County, Georgia
- Greene County, Illinois
- Greene County, Indiana
- Greene County, Mississippi
- Greene County, Missouri
- Greene County, New York
- Greene County, North Carolina
- Greene County, Ohio
- Greene County, Pennsylvania
- Greene County, Tennessee
- Greene County, Virginia