Monmouth Map
Monmouth is a city in Jackson County, Iowa, United States. The population was 180 at the 2000 census.
Monmouth is located at 42°4?35?N 90°52?50?W / 42.07639°N 90.88056°W / 42.07639; -90.88056 (42.076357, -90.880476).
According to the United States Census Bureau, the city has a total area of 0.6 square miles (1.5 km²), all of it land.
Nearby cities include Baldwin, Maquoketa, Center Junction, Olin, Lowden.