About This Place
Old Monroe is a city in Lincoln County, Missouri, United States. The population was 250 at the 2000 census.
Old Monroe is located at 38°55′55″N 90°44′53″W / 38.93194°N 90.74806°W / 38.93194; -90.74806 (38.931993, -90.748049).
According to the United States Census Bureau, the city has a total area of 0.2 square miles (0.4 km²), of land.