| Index | St. Elmo | Illinois | National |
| Income per capita | $29,193 | $47,397 | $44,883 |
| Median household income | $65,584 | $88,967 | $81,333 |
| Median income owner occupied | $69,671 | $111,557 | $106,172 |
| Median income renter occupied | $35,366 | $52,117 | $52,080 |
| Median earnings male | $43,680 | $60,185 | $54,343 |
| Median earnings female | $31,382 | $40,368 | $38,439 |
| Unemployment rate | 4.8% | 6.6% | 4.9% |
| Poverty level | 22.1% | 14.0% | 15.1% |

| Labour Type | Male | Female |
| Construction industry | 8.2% | 8.2% |
| Manufacturing sector | 25.6% | 25.6% |
| Financial & insurance services | 3.0% | 3.0% |
| Wholesale & retail services | 21.6% | 21.6% |
| Public administration | 3.9% | 3.9% |
| Transportation, warehousing & utilities | 1.0% | 1.0% |
| Education, health & social services | 5.9% | 5.9% |
| Other | 30.8% | 30.8% |
| City | Population | Household Income | National Avg. |
| Shumway, IL | 136 | $87,418 | 7.5% |
| Mason, IL | 249 | $79,422 | 2.3% |
| Iola, IL | 94 | $75,814 | 6.8% |
| St. Peter, IL | 456 | $74,518 | 8.4% |
| Herrick, IL | 381 | $72,349 | 11.0% |
| St. Elmo, IL | 1,505 | $65,584 | 19.4% |
| City | Population | Household Income | National Avg. |
| Lake Don Pedro, CA | 1,505 | $67,241 | 17.3% |
| Belle Plaine, KS | 1,505 | $88,233 | 8.5% |
| Clarkson, KY | 1,505 | $39,152 | 51.9% |
| Urania, LA | 1,505 | $18,355 | 77.4% |
| Tonka Bay, MN | 1,505 | $201,632 | 147.9% |
| St. Elmo, IL | 1,505 | $65,584 | 19.4% |