St. Clair County

Population: 251,018

St. Clair County (pop. 251,018) — your citizen empowerment hub. Know your local laws, connect with officials, and build solutions with your community.

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Cities & Towns

• Belleville city (pop. 40,726)
• Cahokia Heights city (pop. 17,114)
• East St. Louis city (pop. 17,642)
• Fairview Heights city (pop. 16,125)
• O'Fallon city (pop. 31,968)
• Shiloh village (pop. 14,736)
• Swansea village (pop. 14,472)