South Union may refer to a location in the United States:
South Union, Kentucky, an unincorporated community South Union Shaker Center House and Preservatory South Union, South Carolina, a census-designated place South Union Missionary Baptist Church, Palestine, Texas South Union School, Southborough, Massachusetts South Union Street Historic District (disambiguation), locations in North Carolina South Union Street Historic District (Concord, North Carolina) South Union Street–Boardman River Bridge, Michigan South Union Township, Pennsylvania
See also Old South Union Church, Weymouth, Massachusetts Shaker Museum at South Union, Kentucky