Grundy County, IL
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            Grundy County Population: 37,535 Population Density: 89.4 per square mile Water Area Percentage: 2.44% (10.52 square miles) Land Area Percentage: 97.56% (419.90 square miles) Total Area: 430.42 square miles Housing Units: 15,040 per square mile County Links Lakes In Grundy County • Heidecke Collins Lake  | 
        
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