South Milwaukee is a city in Milwaukee County, Wisconsin, United States. The population was 21,156 at the 2010 census.HistorySouth Milwaukee was laid out in 1891 by the South Milwaukee company within the Town of Oak Creek, with the purpose of serving as a rival industrial suburb of the City of Milwaukee, and was named from its location south of Milwaukee. South Milwaukee was incorporated as a village in 1892.GeographySouth Milwaukee is located at .According to the United States Census Bureau, the city has a total area of 4.81sqmi, of which, 4.80sqmi is land and 0.01sqmi is water.Demographics2010 censusAs of the census of 2010, there were 21,156 people, 9,043 households, and 5,475 families residing in the city. The population density was 4407.5PD/sqmi. There were 9,722 housing units at an average density of 2025.4/sqmi. The racial makeup of the city was 91.6% White, 2.0% African American, 0.8% Native American, 1.1% Asian, 2.1% from other races, and 2.2% from two or more races. Hispanic or Latino of any race were 8.0% of the population.