| Index | Fairmont City | Illinois | National |
| Income per capita | $26,829 | $47,397 | $44,883 |
| Median household income | $56,034 | $88,967 | $81,333 |
| Median income owner occupied | $68,924 | $111,557 | $106,172 |
| Median income renter occupied | $48,461 | $52,117 | $52,080 |
| Median earnings male | $54,349 | $60,185 | $54,343 |
| Median earnings female | $34,779 | $40,368 | $38,439 |
| Unemployment rate | 1.5% | 6.6% | 4.9% |
| Poverty level | 33.5% | 14.0% | 15.1% |


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| Labour Type | Male | Female |
| Construction industry | 20.8% | 20.8% |
| Manufacturing sector | 13.9% | 13.9% |
| Financial & insurance services | 1.2% | 1.2% |
| Wholesale & retail services | 8.9% | 8.9% |
| Public administration | 2.3% | 2.3% |
| Transportation, warehousing & utilities | 12.2% | 12.2% |
| Education, health & social services | 7.9% | 7.9% |
| Other | 32.8% | 32.8% |
| City | Population | Household Income | National Avg. |
| Ladue, MO | 8,903 | $368,480 | 353.1% |
| Grantwood Village, MO | 981 | $189,545 | 133.0% |
| Clayton, MO | 17,205 | $164,109 | 101.8% |
| Columbia, IL | 10,985 | $158,048 | 94.3% |
| Webster Groves, MO | 23,373 | $138,121 | 69.8% |
| Fairmont City, IL | 2,132 | $56,034 | 31.1% |
| City | Population | Household Income | National Avg. |
| Midway, GA | 2,132 | $102,804 | 26.4% |
| Belle Rose, LA | 2,132 | $64,112 | 21.2% |
| Ringgold, LA | 2,132 | $35,532 | 56.3% |
| La Plata, NM | 2,132 | $75,253 | 7.5% |
| Elmwood Place, OH | 2,132 | $46,232 | 43.2% |
| Fairmont City, IL | 2,132 | $56,034 | 31.1% |