All Countries
Williamsville, IL
Full City Profile · Illinois · Sangamon County County
3.8
/5.0
B+
Good
1,519
Population
980/sq mi density
$104,135
Median Income
$57,915 per capita
$187,000
Home Value
$244,339 Zillow
$1,055
Median Rent
19.3% income on rent
54°F
Avg Temperature
302 sunny days/yr
576
Violent Crime/100K
1,009 property/100K
B+
Overall
3.8 / 5.0
Good overall score based on economy, affordability, safety and education
A+
Economy
4.9 / 5.0
$104,135 median income, 1.2% unemployment
A+
Affordability
5.0 / 5.0
$187,000 home value, $1,055/mo rent
F
Safety
1.0 / 5.0
576 violent crimes/100K (52% above avg)
A
Education
4.2 / 5.0
39.5% bachelor's degree or higher
Change Over Time (2013–2023)
Population Change
-3.6%
1,491 → 1,437
over 10 years
Annual Pop. Growth
-0.37%
Compound annual growth rate
Median Income Change
+38.8%
$75,000 → $104,135
nominal, not inflation-adjusted
Annual Income Growth
+3.34%
Compound annual growth rate
Population Over Time
Total population for Williamsville 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
1,400
-37 from 2023 (1,437)
Projected Median Income 2030
$131,062
+$26,927 from 2023 ($104,135)
Year-by-Year Detail
| Year | Population | YoY % | Median Income | YoY % |
|---|---|---|---|---|
| 2013 | 1,491 | — | $75,000 | — |
| 2015 | 1,492 | +0.1% | $84,342 | +12.5% |
| 2017 | 1,496 | +0.3% | $83,472 | -1% |
| 2019 | 1,487 | -0.6% | $84,922 | +1.7% |
| 2021 | 1,424 | -4.2% | $89,551 | +5.5% |
| 2023 | 1,437 | +0.9% | $104,135 | +16.3% |
Source: U.S. Census ACS 5-Year Estimates (Data Commons). Home value and rent are not yet available historically.