Turkey Hill Grange Hall

St. Clair County is the ninth most populous county in Illinois. Located directly east of St. Louis, the county is part of the Metro East region of the Greater St. Louis metropolitan area in southern Illinois. As of the 2020 United States census, St. Clair County had a population of 257,400, making it the third most populous county in Illinois outside the Chicago metropolitan area. Belleville is the county’s seat and largest city.Cahokia Village was founded in 1697 by French settlers and served as a Jesuit mission to convert tribes of the Illinois Confederation to Christianity. Prior to the establishment of Illinois as a state, the government of the Northwest Territory created St. Clair County in 1790 out of the western half of Knox County. In 1809, the county became the administrative center of the Illinois Territory and one of the two original counties of Illinois, alongside Randolph County. In 1970, the United States Census Bureau placed the mean center of U.S. population in St. Clair County.

WSDZ (1260 AM) is a radio station licensed to Belleville, Illinois, and serving the Greater St. Louis radio market. It is owned and operated by Relevant Radio, Inc. WSDZ carries a Catholic talk and teaching radio format supplied by the Relevant Radio network. WSDZ, along with 1120 KMOX, are responsible for activation of the St. Louis area Emergency Alert System.By day, WSDZ is powered at 20,000 watts. But at night, to avoid interfering with other stations on AM 1260, it reduces power to 5,000 watts. It uses a directional antenna at all times. The studios are located on Weber Hill Road in St. Louis. The transmitter is off Schuleter Germaine Road in Belleville. Programming is also heard on 99-watt FM translator 95.1 MHz K236CS in St. Louis.

Southwestern Illinois College is a public community college in Illinois with campuses in Belleville, Granite City, and Red Bud. It also has off-campus sites throughout the district, including Scott Air Force Base and the East St. Louis Community College Center.

Belleville High School East is a public high school in Belleville, Illinois, United States. It is part of Belleville Township High School District. It was established in 1966.

Boasting 6500 square feet, the William and Florence Schmidt Art Center, located on the Belleville campus of Southwestern Illinois College, facilitates visual literacy through exhibitions of art and cultural artifacts while inspiring, informing, and connecting the college and community. With changing exhibits throughout the year, it showcases the art created by professional artists from around the country and local high school and college artists who are just beginning their journey in the art world. In addition, the Schmidt Art Center hosts cultural events in conjunction with professional artists, poets, and musicians. Owning over nine hundred works of art, the Schmidt Art Center boasts the most extensive collection held by any two-year college in Illinois, including paintings, photographs, sculptures, and artifacts. The collection was mostly acquired through private donations and funds from the Illinois Art in Architecture program.Owned by Southwestern Illinois College, The Schmidt operates under its Foundation and may be rented for private events.

College station is a St. Louis MetroLink station. This station serves Southwestern Illinois College and the Green Mount Commons shopping center on the eastern edge of Belleville, Illinois. It is also a large commuter station featuring 598 park and ride spaces and 25 long-term spaces.

Belleville station is a St. Louis MetroLink station. The station bisects Scheel Street in the northern section of Belleville, Illinois approximately one-mile (1.6 km) from the center of town. It has a MetroBus transfer and a large parking lot on the southwest side of the tracks that features 287 park and ride spaces and 34 long-term spaces. This station also includes a small retail building with four storefronts near the bus boarding plaza. In 2022, the concrete area between the bus bays and MetroLink entrance was updated into an interactive space that boasts a vibrant-colored “Art Grows in Belleville” theme and includes new custom bike racks, shade structures, a Belleville city logo sign, benches, planters and elevated window artwork. The third "Transit Stop Transformation" project to be completed, it was unveiled on June 26, 2022, by Citizens for Modern Transit, the St. Clair County Transit District, AARP in St. Louis, and Metro Transit.

Hotel Belleville is a historic hotel building at 16 S. Illinois Street in Belleville, Illinois. The hotel was built in 1930–31 to replace the city's previous hotel, the Belleville House; like its predecessor, the hotel marketed itself as the most luxurious and modern hotel in Belleville. Architects Manske & Bartling designed the building in the Art Deco style; their design included first-floor window bays with terra cotta blocks, brick pilasters above the entrance, ornamental brickwork on the upper floors, and a parapet. The hotel's amenities included a restaurant and cocktail lounge, banquet and event space, office space for community organizations, and storefronts for local businesses. In the decades after it opened, the building served both as a center of Belleville's social life and a home for regional conventions. The hotel operated until 1961, when it was converted to an assisted living facility for the elderly.The building was added to the National Register of Historic Places on June 20, 2018.

The St. Clair County Courthouse is a government building in Belleville, the county seat of St. Clair County, Illinois, United States. Built in 1976, it is the fifth courthouse in the history of the county, and one of two that still stands.

The Cathedral of Saint Peter is the mother church of the Roman Catholic Diocese of Belleville, located in Belleville, Illinois. The cathedral parish of Saint Peter was founded in 1842 at a location east of the present structure, and named after Saint Barnabas the Apostle; it was rededicated to Saint Peter in 1847. By 1863, the congregation recognized the need for a larger structure. It constructed a brick church on the cathedral's present site which it dedicated in 1866.In 1887, Pope Leo XIII created the Diocese of Belleville from the southern portion of the Diocese of Alton (now the Diocese of Springfield) and named Reverend John Janssen as the first bishop. Janssen chose St. Peter's as his cathedral. On January 4, 1912, around 6 p.m., neighborhood children noticed a fire in the upper portion of the building. Although they arrived quickly, firefighters were hampered in their efforts to extinguish the blaze by a lack of water pressure to reach the 80 ft (24 m) roof and the bitter 15 °F (−9 °C) temperatures. Water company officials blamed the poor water pressure on a broken valve at the water station. Soon, the fire burned through the roof timbers, which fell and ignited other parts of the structure. When the fire was extinguished, all that remained were the exterior walls and bell tower. One local newspaper estimated the damage at US$100,000 and said that insurance would cover only $40,000 of the repairs.The present structure's Gothic architecture was modeled after that of the Cathedral of Exeter, England. It was designed by the architect Victor Klutho. The brick walls were covered with Winona split-face dolomitic limestone accented with Indiana limestone in 1956. The sanctuary was renovated in 1968, to conform to directives of the Second Vatican Council, and the south end of the cathedral expanded to increase capacity to 1,270. A mass in January 2012, marked the centennial of the fire and rebuilding, and also reinstallation of the pulpit and cathedra canopy which were removed during the 1968 work.The cathedral houses a three-manual, 40-rank organ by the M. P. Moller Company that dates from 1968. A second console has been added along with four ranks of pipes.

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.