| County : | Polk County |
| State : | Iowa (IA) |
| Land Area : | 573.79 sq mi |
| Water Area : | 17.74 sq mi |
| Latitude : | 41.6842807 |
| Longitude : | -93.5697204 |
| Population (2010): | 430,640 |
| Population Estimate (2012) : | 431,811 |
| Population Density : | 750.52/sq mi |
| Housing Units (2012) : | 182,262 |
| Median Household Income (2012) : | $58,096 (Iowa : $51,129, USA : $53,046) |
| Median Family Income (2012) : | $73,440 (Iowa : $64,772, USA : $64,585) |
| Median House Price (2012) : | $153,600 (Iowa : $123,000, USA : $181,400) |
Polk County Cities / Towns
| Alleman City (432) | Altoona City (14,541) | Ankeny City (45,582) |
| Bondurant City (3,860) | Carlisle City (3,876) | Clive City (15,447) |
| Des Moines City (203,433) | Elkhart City (683) | Granger City (1,244) |
| Grimes City (8,246) | Johnston City (17,278) | Mitchellville City (2,254) |
| Pleasant Hill City (8,785) | Polk City (3,418) | Runnells City (507) |
| Saylorville (3,301) | Sheldahl City (319) | Urbandale City (39,463) |
| West Des Moines City (56,609) | Windsor Heights City (4,860) |
Polk County Zip Codes
| 50007 (474) | 50009 (16,136) | 50021 (21,595) |
| 50023 (27,986) | 50032 (399) | 50035 (5,387) |
| 50046 (1,524) | 50047 (5,559) | 50061 (1,701) |
| 50073 (1,195) | 50109 (2,762) | 50111 (9,407) |
| 50124 (3,750) | 50131 (17,499) | 50156 (4,412) |
| 50161 (2,047) | 50169 (3,093) | 50226 (4,724) |
| 50237 (3,095) | 50243 (244) | 50244 (1,813) |
| 50265 (31,653) | 50266 (23,625) | 50309 (5,431) |
| 50310 (30,221) | 50311 (15,113) | 50312 (15,339) |
| 50313 (17,376) | 50314 (12,465) | 50315 (35,853) |
| 50316 (16,440) | 50317 (36,207) | 50320 (20,027) |
| 50321 (7,846) | 50322 (31,530) | 50323 (10,201) |
| 50324 (4,903) | 50325 (15,448) | 50327 (10,467) |