Unionville is an unincorporated community in Benton Township, Monroe County, in the U.S. state of Indiana.

[1] Unionville was originally known as Fleenersburg, and under the latter name was platted in 1847.

[3] The post office at Unionville has been in operation since 1848.

[4] In 1911, Unionville was the precise center of the United States population.

This Monroe County, Indiana location article is a stub.