| Index | Marble Rock | Iowa | National |
| Income per capita | $53,679 | $42,672 | $44,883 |
| Median household income | $89,625 | $81,387 | $81,333 |
| Median income owner occupied | $96,520 | $98,724 | $106,172 |
| Median income renter occupied | $42,482 | $45,890 | $52,080 |
| Median earnings male | $54,551 | $54,047 | $54,343 |
| Median earnings female | $45,984 | $36,462 | $38,439 |
| Unemployment rate | 1.5% | 3.2% | 4.9% |
| Poverty level | 6.2% | 12.3% | 15.1% |

| Labour Type | Male | Female |
| Construction industry | 6.6% | 6.6% |
| Manufacturing sector | 41.8% | 41.8% |
| Financial & insurance services | 0.0% | 0.0% |
| Wholesale & retail services | 6.6% | 6.6% |
| Public administration | 2.2% | 2.2% |
| Transportation, warehousing & utilities | 13.2% | 13.2% |
| Education, health & social services | 2.2% | 2.2% |
| Other | 27.5% | 27.5% |
| City | Population | Household Income | National Avg. |
| Nora Springs, IA | 1,692 | $96,346 | 18.5% |
| Hansell, IA | 125 | $86,790 | 6.7% |
| Rockford, IA | 860 | $85,851 | 5.6% |
| Clarksville, IA | 1,391 | $83,473 | 2.6% |
| Allison, IA | 1,169 | $80,600 | 0.9% |
| Marble Rock, IA | 329 | $89,625 | 10.2% |
| City | Population | Household Income | National Avg. |
| Twin Groves, AR | 329 | $42,974 | 47.2% |
| Manalapan, FL | 329 | $294,938 | 262.6% |
| Barnum, IA | 329 | $106,171 | 30.5% |
| Greeley, IA | 329 | $104,680 | 28.7% |
| Rhodes, IA | 329 | $71,340 | 12.3% |
| Marble Rock, IA | 329 | $89,625 | 10.2% |