| Index | Quincy | Illinois | National |
| Income per capita | $29,105 | $31,502 | $29,829 |
| Median household income | $46,935 | $59,196 | $55,322 |
| Median income owner occupied | $61,585 | $75,354 | $70,586 |
| Median income renter occupied | $28,458 | $34,488 | $35,192 |
| Median earnings male | $39,595 | $40,474 | $36,919 |
| Median earnings female | $26,066 | $27,197 | $26,250 |
| Unemployment rate | 3.3% | 5.3% | 4.7% |
| Poverty level | 15.3% | 14.0% | 15.1% |


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| Labour Type | Male | Female |
| Construction industry | 6.3% | 6.3% |
| Manufacturing sector | 23.3% | 23.3% |
| Financial & insurance services | 1.8% | 1.8% |
| Wholesale & retail services | 20.7% | 20.7% |
| Public administration | 4.8% | 4.8% |
| Transportation, warehousing & utilities | 7.4% | 7.4% |
| Education, health & social services | 9.3% | 9.3% |
| Other | 24.0% | 24.0% |
| City | Population | Household Income | National Avg. |
| Columbus, IL | 80 | $63,750 | 15.2% |
| Liberty, IL | 398 | $63,333 | 14.5% |
| Payson, IL | 1,398 | $62,813 | 13.5% |
| Mendon, IL | 1,092 | $56,000 | 1.2% |
| Coatsburg, IL | 180 | $55,714 | 0.7% |
| Quincy, IL | 40,111 | $46,935 | 15.2% |
| City | Population | Household Income | National Avg. |
| San Gabriel, CA | 40,108 | $70,892 | 28.1% |
| Hollister, CA | 40,100 | $80,670 | 45.8% |
| Cape Girardeau, MO | 40,100 | $45,713 | 17.4% |
| Spanish Fork, UT | 40,069 | $79,846 | 44.3% |
| Holyoke, MA | 40,161 | $42,537 | 23.1% |
| Quincy, IL | 40,111 | $46,935 | 15.2% |