| Index | Marathon | Iowa | National |
| Income per capita | $54,650 | $42,672 | $44,883 |
| Median household income | $64,892 | $81,387 | $81,333 |
| Median income owner occupied | $77,977 | $98,724 | $106,172 |
| Median income renter occupied | $49,881 | $45,890 | $52,080 |
| Median earnings male | $60,193 | $54,047 | $54,343 |
| Median earnings female | $30,339 | $36,462 | $38,439 |
| Unemployment rate | 11.5% | 3.2% | 4.9% |
| Poverty level | 12.6% | 12.3% | 15.1% |


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| Labour Type | Male | Female |
| Construction industry | 11.9% | 11.9% |
| Manufacturing sector | 15.3% | 15.3% |
| Financial & insurance services | 0.0% | 0.0% |
| Wholesale & retail services | 16.9% | 16.9% |
| Public administration | 0.0% | 0.0% |
| Transportation, warehousing & utilities | 22.0% | 22.0% |
| Education, health & social services | 10.2% | 10.2% |
| Other | 23.7% | 23.7% |
| City | Population | Household Income | National Avg. |
| Webb, IA | 186 | $85,118 | 4.7% |
| Sioux Rapids, IA | 940 | $81,259 | 0.1% |
| Albert City, IA | 605 | $80,685 | 0.8% |
| Curlew, IA | 69 | $79,609 | 2.1% |
| Linn Grove, IA | 182 | $71,710 | 11.8% |
| Marathon, IA | 187 | $64,892 | 20.2% |
| City | Population | Household Income | National Avg. |
| Olancha, CA | 187 | $90,001 | 10.7% |
| Fort Green, FL | 187 | $122,990 | 51.2% |
| Alston, GA | 187 | $40,150 | 50.6% |
| Bristow, IA | 187 | $0 | 100.0% |
| Grafton, IA | 187 | $79,946 | 1.7% |
| Marathon, IA | 187 | $64,892 | 20.2% |