| Index | Onarga | Illinois | National |
| Income per capita | $28,531 | $47,397 | $44,883 |
| Median household income | $70,731 | $88,967 | $81,333 |
| Median income owner occupied | $73,040 | $111,557 | $106,172 |
| Median income renter occupied | $56,421 | $52,117 | $52,080 |
| Median earnings male | $45,068 | $60,185 | $54,343 |
| Median earnings female | $37,495 | $40,368 | $38,439 |
| Unemployment rate | 4.2% | 6.6% | 4.9% |
| Poverty level | 18.0% | 14.0% | 15.1% |

| Labour Type | Male | Female |
| Construction industry | 4.3% | 4.3% |
| Manufacturing sector | 30.4% | 30.4% |
| Financial & insurance services | 0.0% | 0.0% |
| Wholesale & retail services | 23.7% | 23.7% |
| Public administration | 1.6% | 1.6% |
| Transportation, warehousing & utilities | 1.6% | 1.6% |
| Education, health & social services | 7.0% | 7.0% |
| Other | 31.5% | 31.5% |
| City | Population | Household Income | National Avg. |
| Martinton, IL | 358 | $97,426 | 19.8% |
| Gilman, IL | 1,776 | $85,806 | 5.5% |
| Crescent City, IL | 504 | $85,545 | 5.2% |
| Buckley, IL | 525 | $85,456 | 5.1% |
| Ashkum, IL | 834 | $83,670 | 2.9% |
| Onarga, IL | 1,171 | $70,731 | 13.0% |
| City | Population | Household Income | National Avg. |
| Fayette, IA | 1,171 | $52,003 | 36.1% |
| Blue Mound, IL | 1,171 | $73,748 | 9.3% |
| White Plains, NC | 1,171 | $65,881 | 19.0% |
| Lakeview, OH | 1,171 | $64,399 | 20.8% |
| Robert Lee, TX | 1,171 | $56,541 | 30.5% |
| Onarga, IL | 1,171 | $70,731 | 13.0% |