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Johnson County, KS
| Johnson County Population: 451,086 Population Density: 946.1 per square mile Water Area Percentage: 0.7% (3.37 square miles) Land Area Percentage: 99.3% (476.78 square miles) Total Area: 480.15 square miles Housing Units: 181,612 per square mile County Links | 
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| Quick Links Green River Lake News Green River Lake Photos Green River Lake Videos | 





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