Swansea is located in St. Clair County, IL. The population is 13,495, making Swansea the 7th largest city in St. Clair County.
There are 3 public schools in Swansea with an average Homefacts rating of B+. The total crime rate for Swansea is low , and there are 3 registered sex offenders residing in the city. Unemployment in Swansea is very high and the median home sales price is $0. Detailed and up-to-date Swansea property reports are available for any property address.
Cities near Swansea include St. Clair Township, Belleville and Belleville Township.