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St. Clair County, MO
| St. Clair County Population: 9,652 Population Density: 14.3 per square mile Water Area Percentage: 3.6% (25.25 square miles) Land Area Percentage: 96.4% (676.66 square miles) Total Area: 701.90 square miles Housing Units: 5,205 per square mile County Links Lakes In St. Clair County • Harry S. Truman Reservoir | 
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