| Index | Williamson | Illinois | National |
| Income per capita | $39,018 | $47,397 | $44,883 |
| Median household income | $68,692 | $88,967 | $81,333 |
| Median income owner occupied | $67,388 | $111,557 | $106,172 |
| Median income renter occupied | $78,258 | $52,117 | $52,080 |
| Median earnings male | $63,108 | $60,185 | $54,343 |
| Median earnings female | $44,807 | $40,368 | $38,439 |
| Unemployment rate | 3.0% | 6.6% | 4.9% |
| Poverty level | 11.0% | 14.0% | 15.1% |

| Labour Type | Male | Female |
| Construction industry | 6.1% | 6.1% |
| Manufacturing sector | 32.7% | 32.7% |
| Financial & insurance services | 0.0% | 0.0% |
| Wholesale & retail services | 18.4% | 18.4% |
| Public administration | 8.2% | 8.2% |
| Transportation, warehousing & utilities | 10.2% | 10.2% |
| Education, health & social services | 0.0% | 0.0% |
| Other | 20.4% | 20.4% |
| City | Population | Household Income | National Avg. |
| Holiday Shores, IL | 3,157 | $152,229 | 87.2% |
| Grantfork, IL | 494 | $128,474 | 58.0% |
| Dorchester, IL | 154 | $115,500 | 42.0% |
| Edwardsville, IL | 25,839 | $112,461 | 38.3% |
| Hamel, IL | 830 | $103,749 | 27.6% |
| Williamson, IL | 206 | $68,692 | 15.5% |
| City | Population | Household Income | National Avg. |
| Garner, AR | 206 | $48,774 | 40.0% |
| Burr Oak, IA | 206 | $55,861 | 31.3% |
| Beason, IL | 206 | $58,131 | 28.5% |
| Montrose, IL | 206 | $66,707 | 18.0% |
| Rush Center, KS | 206 | $117,200 | 44.1% |
| Williamson, IL | 206 | $68,692 | 15.5% |