All Countries
Decatur, IL
Full City Profile · Illinois · Macon County County
3.0
/5.0
B
Good
70,368
Population
1,610/sq mi density
$50,809
Median Income
$31,990 per capita
$97,300
Home Value
$100,881 Zillow
$796
Median Rent
26.5% income on rent
53°F
Avg Temperature
293 sunny days/yr
530
Violent Crime/100K
2,763 property/100K
B
Overall
3.0 / 5.0
Good overall score based on economy, affordability, safety and education
B
Economy
3.2 / 5.0
$50,809 median income, 5.0% unemployment
A+
Affordability
5.0 / 5.0
$97,300 home value, $796/mo rent
F
Safety
1.0 / 5.0
530 violent crimes/100K (40% above avg)
C+
Education
2.7 / 5.0
21.3% bachelor's degree or higher
Change Over Time (2013–2023)
Population Change
-8.2%
74,971 → 68,824
over 10 years
Annual Pop. Growth
-0.85%
Compound annual growth rate
Median Income Change
+28.6%
$39,514 → $50,809
nominal, not inflation-adjusted
Annual Income Growth
+2.55%
Compound annual growth rate
Population Over Time
Total population for Decatur 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
64,832
-3,992 from 2023 (68,824)
Projected Median Income 2030
$60,602
+$9,793 from 2023 ($50,809)
Year-by-Year Detail
| Year | Population | YoY % | Median Income | YoY % |
|---|---|---|---|---|
| 2013 | 74,971 | — | $39,514 | — |
| 2015 | 73,291 | -2.2% | $40,679 | +2.9% |
| 2017 | 71,832 | -2% | $41,977 | +3.2% |
| 2019 | 70,734 | -1.5% | $42,701 | +1.7% |
| 2021 | 69,646 | -1.5% | $45,111 | +5.6% |
| 2023 | 68,824 | -1.2% | $50,809 | +12.6% |
Source: U.S. Census ACS 5-Year Estimates (Data Commons). Home value and rent are not yet available historically.