All Countries
Alton, IL
Full City Profile · Illinois · St. Louis city County
3.0
/5.0
B
Good
25,430
Population
1,623/sq mi density
$53,005
Median Income
$28,970 per capita
$99,500
Home Value
$100,385 Zillow
$948
Median Rent
31.4% income on rent
56°F
Avg Temperature
293 sunny days/yr
1,017
Violent Crime/100K
4,177 property/100K
B
Overall
3.0 / 5.0
Good overall score based on economy, affordability, safety and education
B
Economy
3.3 / 5.0
$53,005 median income, 3.1% unemployment
A+
Affordability
5.0 / 5.0
$99,500 home value, $948/mo rent
F
Safety
1.0 / 5.0
1,017 violent crimes/100K (168% above avg)
C+
Education
2.7 / 5.0
21.2% bachelor's degree or higher
Change Over Time (2013–2023)
Population Change
-8.4%
27,390 → 25,094
over 10 years
Annual Pop. Growth
-0.87%
Compound annual growth rate
Median Income Change
+43.4%
$36,973 → $53,005
nominal, not inflation-adjusted
Annual Income Growth
+3.67%
Compound annual growth rate
Population Over Time
Total population for Alton 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
23,605
-1,489 from 2023 (25,094)
Projected Median Income 2030
$68,216
+$15,211 from 2023 ($53,005)
Year-by-Year Detail
| Year | Population | YoY % | Median Income | YoY % |
|---|---|---|---|---|
| 2013 | 27,390 | — | $36,973 | — |
| 2015 | 27,011 | -1.4% | $36,250 | -2% |
| 2017 | 26,730 | -1% | $37,495 | +3.4% |
| 2019 | 26,262 | -1.8% | $40,211 | +7.2% |
| 2021 | 25,422 | -3.2% | $45,225 | +12.5% |
| 2023 | 25,094 | -1.3% | $53,005 | +17.2% |
Source: U.S. Census ACS 5-Year Estimates (Data Commons). Home value and rent are not yet available historically.