Monroe, Ohio Monroe, Ohio Monroe is a city located in east central Butler and west central Warren counties in the southwestern part of the U.S. state of Ohio. As of the 2010 Census, the city population was 12,442, up from 4,008 in 1990. Monroe was laid out in 1817 on the Dayton and Cincinnati pike. The city is named for President James Monroe, fifth President of the United States. In the early 1830s, Monroe contained one store and 119 inhabitants. Monroe is located at (39.444658, −84.364044). According to the United States Census Bureau, the city has a total area of , of
Monroe, Michigan of Monroe in honor of President James Monroe. He visited the Michigan Territory in 1817. In the same year, the city of Monroe was named as the county seat of the newly created Monroe County. Monroe was re-incorporated as a city in 1837. Settled mostly by American migrants from New York and New England, Monroe later became associated with events in the West in the later 19th century, particularly the Indian Wars. It is known as the childhood home of George Armstrong Custer (1839–1876), who had a military career in which he reached the rank of Major General. His family