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Polk County, IA
| Polk County Population: 374,601 Population Density: 657.9 per square mile Water Area Percentage: 3.81% (22.55 square miles) Land Area Percentage: 96.19% (569.35 square miles) Total Area: 591.90 square miles Housing Units: 156,447 per square mile County Links Lakes In Polk County • Big Creek Lake • Saylorville Lake | 
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| Quick Links Big East Reservoir News Big East Reservoir Photos Big East Reservoir Videos | 





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