| Index | Millstadt | Illinois | National |
| Income per capita | $60,963 | $47,397 | $44,883 |
| Median household income | $117,203 | $88,967 | $81,333 |
| Median income owner occupied | $122,572 | $111,557 | $106,172 |
| Median income renter occupied | $66,614 | $52,117 | $52,080 |
| Median earnings male | $64,901 | $60,185 | $54,343 |
| Median earnings female | $51,710 | $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 | 12.9% | 12.9% |
| Manufacturing sector | 11.1% | 11.1% |
| Financial & insurance services | 3.4% | 3.4% |
| Wholesale & retail services | 16.6% | 16.6% |
| Public administration | 11.8% | 11.8% |
| Transportation, warehousing & utilities | 8.8% | 8.8% |
| Education, health & social services | 3.6% | 3.6% |
| Other | 30.4% | 30.4% |
| City | Population | Household Income | National Avg. |
| 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% |
| O'Fallon, IL | 30,151 | $132,987 | 63.5% |
| Millstadt, IL | 3,967 | $117,203 | 44.1% |
| City | Population | Household Income | National Avg. |
| Dumas, AR | 3,967 | $51,826 | 36.3% |
| Valdez, AK | 3,966 | $138,893 | 70.8% |
| Orange, MA | 3,966 | $88,307 | 8.6% |
| Valley Springs, CA | 3,968 | $119,444 | 46.9% |
| Asphodel-Norwood, ON | 3,968 | n/a | |
| Millstadt, IL | 3,967 | $117,203 | 44.1% |