Market Square in Miamisburg, Ohio is a square located at the intersection of Central Avenue and Main Street. It is also the name of a historic district including the square and more, that was listed on the National Register of Historic Places in 1975.
A date of significance for the location is 1850. The district includes Second Empire, Italianate, and Queen Anne in 50 contributing buildings.
The Market Building, on the square, is a simple building with Greek Revival architecture elements, built in 1851. It originally had an open ground floor with arched openings, used as a public marketplace. The arched openings were later bricked in and used as a police station and jail.
The district includes buildings on both sides of Main Street, including at the junction with Central Avenue and at the junction at Linden Avenue.