Union Mills is an unincorporated community in Carroll County, Maryland, United States.
[1] The community is home to the Union Mills Homestead Historic District, added to the National Register of Historic Places in 1971.
[2] Since the 1970s, Carroll County commissioners have tried to build a dam or reservoir centered nearby, defeated in the 1970s and revived in the 2000s as a proposed Union Mills Reservoir.
Union Mills plays a central role in Gettysburg: A Novel of the Civil War, a 2003 alternate history novel written by Newt Gingrich and William R. Forstchen.
This article about a location in Carroll County Maryland is a stub.