Millstadt Township, St. Clair County, Illinois

Millstadt is a village in St. Clair County, Illinois, United States, located at the crossing of Illinois Routes 163 (locally, "Jefferson Avenue") and 158 (locally, "Washington Avenue"). The village is known for its German heritage, with more than half its people of German descent. The population was 4,011 at the 2010 census, but a more recent study in July 2018 estimated the number at 3,885.

Floraville is a census-designated place in St. Clair County, Illinois, United States. Its population was 53 as of the 2010 census.

Paderborn is a census-designated place in St. Clair County, Illinois, United States. Its population was 43 as of the 2010 census.

Smithton is a village in St. Clair County, Illinois, United States. The population was 4,006 in the 2020 United States Census. It is part of the Metro East region of Greater Saint Louis.

Smithton Township (Township 1 South, Range 8 West) is located in St. Clair County, Illinois. As of the 2010 census, its population was 4,275 and it contained 1,684 housing units.

Stookey Township is a township located in St. Clair County, Illinois. It is an unincorporated part of Belleville, Illinois located just west of downtown Belleville, for that reason it is often referred to by locals as Belleville West. As of the 2010 census, its population was 10,007 and it contained 4,394 housing units.Residential homes and small businesses occupy the region along with occasional shopping centers. The township rides along Illinois Route 13 and converges with Illinois Route 15 and Illinois Route 159. The ZIP codes for the township is 62223 & 62260. The telephone area code of the township is 618.

Douglas is an unincorporated community in St. Clair County, Illinois, United States. Douglas is located along Illinois Route 159, 1 mile (1.6 km) northeast of downtown Smithton.

Waterloo High School is a high school in Waterloo, Illinois, and is the only public high school in the Waterloo area.

Imbs (also known as Imbs Station) is an unincorporated community in Stookey Township, St. Clair County, Illinois, United States. Imbs is 4.5 miles (7.2 km) southeast of Cahokia.

Gibault Catholic High School is a private, Roman Catholic high school in Waterloo, Illinois. It is part of the Roman Catholic Diocese of Belleville.

Westview is an unincorporated community in Stookey Township, St. Clair County, Illinois, United States. Westview is located on Illinois Route 163, 7 miles (11 km) south-southeast of East St. Louis.

Prairie du Long Township is located in St. Clair County, Illinois. As of the 2010 census, its population was 2,244 and it contained 864 housing units.