| Index | Shelby | Iowa | National |
| Income per capita | $32,048 | $28,872 | $29,829 |
| Median household income | $48,229 | $54,570 | $55,322 |
| Median income owner occupied | $68,750 | $66,527 | $70,586 |
| Median income renter occupied | $35,441 | $30,828 | $35,192 |
| Median earnings male | $37,132 | $37,409 | $36,919 |
| Median earnings female | $26,971 | $25,115 | $26,250 |
| Unemployment rate | 1.0% | 3.1% | 4.7% |
| Poverty level | 8.4% | 12.3% | 15.1% |
| Labour Type | Male | Female |
| Construction industry | 8.1% | 8.1% |
| Manufacturing sector | 17.2% | 17.2% |
| Financial & insurance services | 0.0% | 0.0% |
| Wholesale & retail services | 27.6% | 27.6% |
| Public administration | 6.8% | 6.8% |
| Transportation, warehousing & utilities | 6.8% | 6.8% |
| Education, health & social services | 11.3% | 11.3% |
| Other | 21.7% | 21.7% |
| City | Population | Household Income | National Avg. |
| Bentley, IA | 158 | $192,794 | 248.5% |
| McClelland, IA | 178 | $96,875 | 75.1% |
| Westphalia, IA | 161 | $81,250 | 46.9% |
| Portsmouth, IA | 171 | $80,938 | 46.3% |
| Underwood, IA | 955 | $77,361 | 39.8% |
| Shelby, IA | 708 | $48,229 | 12.8% |
| City | Population | Household Income | National Avg. |
| Huttig, AR | 708 | $45,185 | 18.3% |
| Ducor, CA | 708 | $27,404 | 50.5% |
| Sharpsburg, MD | 708 | $75,833 | 37.1% |
| Hardwood Acres, MI | 708 | $97,150 | 75.6% |
| Muir, MI | 708 | $29,620 | 46.5% |
| Shelby, IA | 708 | $48,229 | 12.8% |
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