Mercer, Missouri
Mercer is a city in Mercer County, Missouri, United States. Mercer is connected by US Highway 65 to Lineville, Iowa, located about 5 miles north, and Princeton, Missouri, located about 8 miles south-southwest. The subdivisions of Lake Marie and Twin Lake are located just southwest of Mercer.
According to the United States Census Bureau, the city has a total area of 0.37 square miles (0.96 km2), all land.