| Index | Vandalia | Illinois | National |
| Income per capita | $17,994 | $31,502 | $29,829 |
| Median household income | $35,862 | $59,196 | $55,322 |
| Median income owner occupied | $43,798 | $75,354 | $70,586 |
| Median income renter occupied | $22,258 | $34,488 | $35,192 |
| Median earnings male | $22,212 | $40,474 | $36,919 |
| Median earnings female | $22,708 | $27,197 | $26,250 |
| Unemployment rate | 1.7% | 5.3% | 4.7% |
| Poverty level | 20.1% | 14.0% | 15.1% |


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| Labour Type | Male | Female |
| Construction industry | 8.7% | 8.7% |
| Manufacturing sector | 19.4% | 19.4% |
| Financial & insurance services | 1.5% | 1.5% |
| Wholesale & retail services | 17.4% | 17.4% |
| Public administration | 6.4% | 6.4% |
| Transportation, warehousing & utilities | 7.4% | 7.4% |
| Education, health & social services | 10.0% | 10.0% |
| Other | 27.4% | 27.4% |
| City | Population | Household Income | National Avg. |
| St. Peter, IL | 438 | $50,938 | 7.9% |
| Fillmore, IL | 296 | $48,125 | 13.0% |
| Brownstown, IL | 839 | $47,171 | 14.7% |
| Smithboro, IL | 215 | $45,625 | 17.5% |
| Bingham, IL | 86 | $44,583 | 19.4% |
| Vandalia, IL | 6,615 | $35,862 | 35.2% |
| City | Population | Household Income | National Avg. |
| Southgate, FL | 6,617 | $60,045 | 8.5% |
| Scenic Oaks, TX | 6,611 | $139,194 | 151.6% |
| Red Chute, LA | 6,619 | $53,571 | 3.2% |
| Trinity, NC | 6,619 | $58,709 | 6.1% |
| Kentville, NS | 6,619 | n/a | |
| Vandalia, IL | 6,615 | $35,862 | 35.2% |