| Index | Marietta | Illinois | National |
| Income per capita | $37,797 | $47,397 | $44,883 |
| Median household income | $71,834 | $88,967 | $81,333 |
| Median income owner occupied | $74,467 | $111,557 | $106,172 |
| Median income renter occupied | $0 | $52,117 | $52,080 |
| Median earnings male | $73,426 | $60,185 | $54,343 |
| Median earnings female | $0 | $40,368 | $38,439 |
| Unemployment rate | 4.0% | 6.6% | 4.9% |
| Poverty level | 4.9% | 14.0% | 15.1% |


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| Labour Type | Male | Female |
| Construction industry | 36.4% | 36.4% |
| Manufacturing sector | 54.5% | 54.5% |
| Financial & insurance services | 0.0% | 0.0% |
| Wholesale & retail services | 0.0% | 0.0% |
| Public administration | 0.0% | 0.0% |
| Transportation, warehousing & utilities | 0.0% | 0.0% |
| Education, health & social services | 9.1% | 9.1% |
| Other | 0.0% | 0.0% |
| City | Population | Household Income | National Avg. |
| Adair, IL | 184 | $118,499 | 45.7% |
| Fairview, IL | 466 | $85,620 | 5.3% |
| Industry, IL | 554 | $81,206 | 0.2% |
| Lewistown, IL | 2,073 | $76,509 | 5.9% |
| Table Grove, IL | 373 | $72,687 | 10.6% |
| Marietta, IL | 63 | $71,834 | 11.7% |
| City | Population | Household Income | National Avg. |
| Jennette, AR | 63 | $75,291 | 7.4% |
| Mount Hebron, CA | 63 | $0 | 100.0% |
| Rodriguez Camp, CA | 63 | $0 | 100.0% |
| Olowalu, HI | 63 | $131,875 | 62.1% |
| Bradford, IA | 63 | $0 | 100.0% |
| Marietta, IL | 63 | $71,834 | 11.7% |