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Williamson, IL
Full City Profile · Illinois · Madison County County
2.8
/5.0
C+
Fair
164
Population
140/sq mi density
$56,667
Median Income
$32,270 per capita
$75,500
Home Value
$100,968 Zillow
$779
Median Rent
14.2% income on rent
58°F
Avg Temperature
293 sunny days/yr
138
Violent Crime/100K
1,320 property/100K
C+
Overall
2.8 / 5.0
Fair overall score based on economy, affordability, safety and education
B+
Economy
3.9 / 5.0
$56,667 median income, 0.0% unemployment
A+
Affordability
5.0 / 5.0
$75,500 home value, $779/mo rent
F
Safety
1.0 / 5.0
138 violent crimes/100K
F
Education
1.2 / 5.0
2.9% bachelor's degree or higher
Change Over Time (2013–2023)
Population Change
-21.2%
222 → 175
over 10 years
Annual Pop. Growth
-2.35%
Compound annual growth rate
Median Income Change
+77.8%
$31,875 → $56,667
nominal, not inflation-adjusted
Annual Income Growth
+5.92%
Compound annual growth rate
Population Over Time
Total population for Williamson across each available Census ACS release.
Median Household Income Over Time
Median household income reported by U.S. Census ACS. Values are nominal (not adjusted for inflation).
Projected 2030
Simple projections extrapolating the 2013–2023 compound annual growth rate forward. These are mathematical extensions of recent trends, not forecasts — real outcomes depend on migration, policy and economic shifts.
Projected Population 2030
148
-27 from 2023 (175)
Projected Median Income 2030
$84,757
+$28,090 from 2023 ($56,667)
Year-by-Year Detail
| Year | Population | YoY % | Median Income | YoY % |
|---|---|---|---|---|
| 2013 | 222 | — | $31,875 | — |
| 2015 | 220 | -0.9% | $35,000 | +9.8% |
| 2017 | 218 | -0.9% | $48,333 | +38.1% |
| 2019 | 215 | -1.4% | $53,750 | +11.2% |
| 2021 | 182 | -15.3% | $51,346 | -4.5% |
| 2023 | 175 | -3.8% | $56,667 | +10.4% |
Source: U.S. Census ACS 5-Year Estimates (Data Commons). Home value and rent are not yet available historically.