All Countries
Thayer, IL
Full City Profile · Illinois · Sangamon County County
3.0
/5.0
B
Good
638
Population
1,046/sq mi density
$63,125
Median Income
$36,853 per capita
$87,300
Home Value
$119,208 Zillow
$919
Median Rent
30.8% income on rent
55°F
Avg Temperature
302 sunny days/yr
152
Violent Crime/100K
304 property/100K
B
Overall
3.0 / 5.0
Good overall score based on economy, affordability, safety and education
A
Economy
4.0 / 5.0
$63,125 median income, 3.3% unemployment
A+
Affordability
5.0 / 5.0
$87,300 home value, $919/mo rent
F
Safety
1.0 / 5.0
152 violent crimes/100K
D
Education
1.9 / 5.0
11.2% bachelor's degree or higher
Change Over Time (2013–2023)
Population Change
-11%
693 → 617
over 10 years
Annual Pop. Growth
-1.15%
Compound annual growth rate
Median Income Change
+13.1%
$55,813 → $63,125
nominal, not inflation-adjusted
Annual Income Growth
+1.24%
Compound annual growth rate
Population Over Time
Total population for Thayer 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
569
-48 from 2023 (617)
Projected Median Income 2030
$68,812
+$5,687 from 2023 ($63,125)
Year-by-Year Detail
| Year | Population | YoY % | Median Income | YoY % |
|---|---|---|---|---|
| 2013 | 693 | — | $55,813 | — |
| 2015 | 685 | -1.2% | $51,429 | -7.9% |
| 2017 | 673 | -1.8% | $51,250 | -0.3% |
| 2019 | 658 | -2.2% | $61,071 | +19.2% |
| 2021 | 626 | -4.9% | $52,778 | -13.6% |
| 2023 | 617 | -1.4% | $63,125 | +19.6% |
Source: U.S. Census ACS 5-Year Estimates (Data Commons). Home value and rent are not yet available historically.