| Index | Plainfield | Iowa | National |
| Income per capita | $29,709 | $28,872 | $29,829 |
| Median household income | $59,250 | $54,570 | $55,322 |
| Median income owner occupied | $69,688 | $66,527 | $70,586 |
| Median income renter occupied | $52,813 | $30,828 | $35,192 |
| Median earnings male | $46,607 | $37,409 | $36,919 |
| Median earnings female | $26,875 | $25,115 | $26,250 |
| Unemployment rate | 5.7% | 3.1% | 4.7% |
| Poverty level | 7.9% | 12.3% | 15.1% |


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| Labour Type | Male | Female |
| Construction industry | 13.6% | 13.6% |
| Manufacturing sector | 28.0% | 28.0% |
| Financial & insurance services | 1.5% | 1.5% |
| Wholesale & retail services | 14.4% | 14.4% |
| Public administration | 2.3% | 2.3% |
| Transportation, warehousing & utilities | 9.8% | 9.8% |
| Education, health & social services | 7.6% | 7.6% |
| Other | 18.2% | 18.2% |
| City | Population | Household Income | National Avg. |
| Denver, IA | 1,759 | $78,571 | 42.0% |
| Janesville, IA | 1,051 | $72,500 | 31.1% |
| Waverly, IA | 10,172 | $65,701 | 18.8% |
| Tripoli, IA | 1,337 | $63,393 | 14.6% |
| Ionia, IA | 296 | $61,585 | 11.3% |
| Plainfield, IA | 405 | $59,250 | 7.1% |
| City | Population | Household Income | National Avg. |
| Pinedale, AZ | 405 | $0 | 100.0% |
| Ila, GA | 405 | $51,447 | 7.0% |
| Sale City, GA | 405 | $41,250 | 25.4% |
| Good Hope, IL | 405 | $41,250 | 25.4% |
| Thayer, KS | 405 | $41,938 | 24.2% |
| Plainfield, IA | 405 | $59,250 | 7.1% |