| Index | St. Peter | Illinois | National |
| Income per capita | $21,471 | $31,502 | $29,829 |
| Median household income | $50,938 | $59,196 | $55,322 |
| Median income owner occupied | $50,938 | $75,354 | $70,586 |
| Median income renter occupied | $51,250 | $34,488 | $35,192 |
| Median earnings male | $36,667 | $40,474 | $36,919 |
| Median earnings female | $24,286 | $27,197 | $26,250 |
| Unemployment rate | 1.4% | 5.3% | 4.7% |
| Poverty level | 13.3% | 14.0% | 15.1% |


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| Labour Type | Male | Female |
| Construction industry | 15.0% | 15.0% |
| Manufacturing sector | 6.5% | 6.5% |
| Financial & insurance services | 3.7% | 3.7% |
| Wholesale & retail services | 25.2% | 25.2% |
| Public administration | 6.5% | 6.5% |
| Transportation, warehousing & utilities | 5.6% | 5.6% |
| Education, health & social services | 5.6% | 5.6% |
| Other | 31.8% | 31.8% |
| City | Population | Household Income | National Avg. |
| Mason, IL | 243 | $53,750 | 2.8% |
| Patoka, IL | 585 | $52,917 | 4.3% |
| Iola, IL | 91 | $50,000 | 9.6% |
| Altamont, IL | 2,231 | $48,359 | 12.6% |
| Brownstown, IL | 839 | $47,171 | 14.7% |
| St. Peter, IL | 438 | $50,938 | 7.9% |
| City | Population | Household Income | National Avg. |
| Calion, AR | 438 | $62,940 | 13.8% |
| Shaver Lake, CA | 438 | $105,000 | 89.8% |
| Lake City, CO | 438 | $39,167 | 29.2% |
| Moreland, GA | 438 | $78,438 | 41.8% |
| Alleman, IA | 438 | $111,250 | 101.1% |
| St. Peter, IL | 438 | $50,938 | 7.9% |