United States of America
- Monroe, county seat of Union County, North Carolina
- Monroe, a town in Fairfield County, Connecticut
- Monroe, town in Turner County, South Dakota
- Monroe, the county seat of Walton County, Georgia
- Monroe, city in Adams County, Indiana
- Monroe, city in Jasper County, Iowa
- Monroe, capital of the Parish of Ouachita, Louisiana
- Monroe, a town in Waldo County, Maine
- Monroe, Franklin County Municipality, Massachusetts
- Monroe, the county seat of Monroe County, Michigan
- Monroe, charter township of Monroe County, Michigan
- Monroe, township of Newaygo County, Michigan
- Monroe, village of Platte County, Nebraska
- Monroe, County Grafton Township, New Hampshire
- Monroe, Gloucester County township, New Jersey
- Monroe, township of Middlesex County, New Jersey
- Monroe, city in Orange County, New York
- Monroe, town in Butler County, Ohio
- Monroe, a town in Benton County, Oregon
- Monroe, a township in Bedford County, Pennsylvania
- Monroe, borough of Bradford County, Pennsylvania
- Monroe, township in Bradford County, Pennsylvania
- Monroe, a township in Clarion County, Pennsylvania
- Monroe, township of Cumberland County, Pennsylvania
- Monroe, township of Juniata County, Pennsylvania
- Monroe, a township in Snyder County, Pennsylvania
- Monroe, Wyoming County township, Pennsylvania
- Monroe, a city in Sevier County, Utah
- Monroe, a city in Snohomish County, Washington
- Monroe, city in Adams County, Wisconsin
- Monroe, a city in Green County, Wisconsin