| Index | Shelby | Iowa | National |
| Income per capita | $46,880 | $42,672 | $44,883 |
| Median household income | $72,940 | $81,387 | $81,333 |
| Median income owner occupied | $103,688 | $98,724 | $106,172 |
| Median income renter occupied | $51,813 | $45,890 | $52,080 |
| Median earnings male | $53,877 | $54,047 | $54,343 |
| Median earnings female | $39,342 | $36,462 | $38,439 |
| Unemployment rate | 1.0% | 3.2% | 4.9% |
| 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 | 163 | $286,466 | 252.2% |
| McClelland, IA | 184 | $141,608 | 74.1% |
| Portsmouth, IA | 174 | $121,107 | 48.9% |
| Westphalia, IA | 167 | $120,484 | 48.1% |
| Underwood, IA | 986 | $113,817 | 39.9% |
| Shelby, IA | 722 | $72,940 | 10.3% |
| City | Population | Household Income | National Avg. |
| Kasilof, AK | 722 | $118,043 | 45.1% |
| Oxford, AR | 722 | $61,396 | 24.5% |
| Fountain City, IN | 722 | $70,007 | 13.9% |
| Agency, MO | 722 | $112,802 | 38.7% |
| Schaghticoke, NY | 722 | $78,040 | 4.0% |
| Shelby, IA | 722 | $72,940 | 10.3% |