St. Clair County, IL

Belleville IL · St. Clair County 40,560 residents O'Fallon IL · St. Clair County 32,169 residents East St. Louis IL · St. Clair County 17,808 residents Cahokia Heights IL · St. Clair County 17,052 residents Fairview Heights IL · St. Clair County 16,115 residents Shiloh IL · St. Clair County 14,754 residents Swansea IL · St. Clair County 14,445 residents Mascoutah IL · St. Clair County 9,118 residents Lebanon IL · St. Clair County 4,628 residents Freeburg IL · St. Clair County 4,518 residents Caseyville IL · St. Clair County 4,395 residents Millstadt IL · St. Clair County 3,957 residents Smithton IL · St. Clair County 3,888 residents Dupo IL · St. Clair County 3,797 residents Washington Park IL · St. Clair County 2,481 residents Fairmont City IL · St. Clair County 2,169 residents New Athens IL · St. Clair County 1,870 residents Marissa IL · St. Clair County 1,743 residents Brooklyn IL · St. Clair County 623 residents St. Libory IL · St. Clair County 608 residents Lenzburg IL · St. Clair County 448 residents East Carondelet IL · St. Clair County 373 residents Summerfield IL · St. Clair County 331 residents Fayetteville IL · St. Clair County 286 residents Sauget IL · St. Clair County 134 residents