St. Clair County, IL
St. Clair County Population: 256,082 Population Density: 385.8 per square mile Water Area Percentage: 1.51% (10.15 square miles) Land Area Percentage: 98.5% (663.81 square miles) Total Area: 673.95 square miles Housing Units: 104,446 per square mile County Links Lakes In St. Clair County • Baldwin Lake |
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