| Index | Williamson | Iowa | National |
| Income per capita | $14,203 | $28,872 | $29,829 |
| Median household income | $0 | $54,570 | $55,322 |
| Median income owner occupied | $54,375 | $66,527 | $70,586 |
| Median income renter occupied | $0 | $30,828 | $35,192 |
| Median earnings male | $63,000 | $37,409 | $36,919 |
| Median earnings female | $27,188 | $25,115 | $26,250 |
| Unemployment rate | 1.8% | 3.1% | 4.7% |
| Poverty level | 13.8% | 12.3% | 15.1% |


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| Labour Type | Male | Female |
| Construction industry | 12.0% | 12.0% |
| Manufacturing sector | 24.0% | 24.0% |
| Financial & insurance services | 0.0% | 0.0% |
| Wholesale & retail services | 20.0% | 20.0% |
| Public administration | 0.0% | 0.0% |
| Transportation, warehousing & utilities | 44.0% | 44.0% |
| Education, health & social services | 0.0% | 0.0% |
| Other | 0.0% | 0.0% |
| City | Population | Household Income | National Avg. |
| Milo, IA | 781 | $62,500 | 13.0% |
| Lacona, IA | 339 | $57,750 | 4.4% |
| Melrose, IA | 179 | $49,048 | 11.3% |
| Chariton, IA | 4,127 | $48,316 | 12.7% |
| Melcher-Dallas, IA | 1,313 | $45,000 | 18.7% |
| Williamson, IA | 184 | $0 | 100.0% |
| City | Population | Household Income | National Avg. |
| Deer Creek, AZ | 184 | $43,529 | 21.3% |
| Clio, CA | 184 | $28,617 | 48.3% |
| Lodoga, CA | 184 | $0 | 100.0% |
| Tooleville, CA | 184 | $0 | 100.0% |
| Farmington, DE | 184 | $0 | 100.0% |
| Williamson, IA | 184 | $0 | 100.0% |