South Beloit is a city located in Winnebago County, Illinois, United States. It is part of the Rockford, Illinois Metropolitan Statistical Area, but it is essentially a suburban extension of Beloit, Wisconsin, which is directly along the city’s northern border. At the 2010 census, the city’s population was 7,892, up from 5,297 in 2000.
South Beloit is located at 42°29′03″N 89°02′19″W / 42.484228°N 89.038586°W / 42.484228; -89.038586 (42.484228, -89.038586).
According to the 2010 census, South Beloit has a total area of 6.13 square miles (15.88 km), of which 5.9 square miles (15.28 km) (or 96.25%) is land and 0.23 square miles (0.60 km) (or 3.75%) is water.
As of the census of 2000, there were 8,051 people, 3,400 households, and 1,678 families residing in the city. The population density was 1,362.9 people per square mile (526.2/km). There were 2,345 housing units at an average density of 592.2 per square mile (228.6/km). The racial makeup of the city was 87.16% White, 5% African American, 0.63% Native American, 1.01% Asian, 0.07% Pacific Islander, 3.48% from other races, and 1.83% from two or more races. Hispanic or Latino of any race were 7.49% of the population.
There were 2,165 households out of which 33.8% had children under the age of 18 living with them, 49.1% were married couples living together, 11.4% had a female householder with no husband present, and 34.5% were non-families. 28.8% of all households were made up of individuals and 10.3% had someone living alone who was 65 years of age or older. The average household size was 2.46 and the average family size was 3.01.
In the city, the population was spread out with 26.5% under the age of 18, 8.7% from 18 to 24, 33.4% from 25 to 44, 18.5% from 45 to 64, and 12.9% who were 65 years of age or older. The median age was 33 years. For every 100 females, there were 98.1 males. For every 100 females age 18 and over, there were 96.2 males.
The median income for a household in the city was $35,597, and the median income for a family was $41,154. Males had a median income of $33,110 versus $22,596 for females. The per capita income for the city was $18,363. About 8.2% of families and 10.0% of the population were below the poverty line, including 15.4% of those under age 18 and 7.6% of those age 65 or over.