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Spring Bay, IL
Full City Profile · Illinois · Peoria County County
2.8
/5.0
C+
Fair
519
Population
752/sq mi density
$61,111
Median Income
$27,850 per capita
$134,900
Home Value
$119,696 Zillow
$1,083
Median Rent
35.5% income on rent
53°F
Avg Temperature
275 sunny days/yr
379
Violent Crime/100K
2,568 property/100K
C+
Overall
2.8 / 5.0
Fair overall score based on economy, affordability, safety and education
B
Economy
3.2 / 5.0
$61,111 median income, 4.0% unemployment
A+
Affordability
5.0 / 5.0
$134,900 home value, $1,083/mo rent
F
Safety
1.0 / 5.0
379 violent crimes/100K
D
Education
1.9 / 5.0
11.5% bachelor's degree or higher
Change Over Time (2013–2023)
Population Change
+1.1%
474 → 479
over 10 years
Annual Pop. Growth
+0.1%
Compound annual growth rate
Median Income Change
+10.6%
$55,278 → $61,111
nominal, not inflation-adjusted
Annual Income Growth
+1.01%
Compound annual growth rate
Population Over Time
Total population for Spring Bay 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
482
+3 from 2023 (479)
Projected Median Income 2030
$65,565
+$4,454 from 2023 ($61,111)
Year-by-Year Detail
| Year | Population | YoY % | Median Income | YoY % |
|---|---|---|---|---|
| 2013 | 474 | — | $55,278 | — |
| 2015 | 469 | -1.1% | $47,500 | -14.1% |
| 2017 | 461 | -1.7% | $50,938 | +7.2% |
| 2019 | 460 | -0.2% | $37,143 | -27.1% |
| 2021 | 469 | +2% | $39,792 | +7.1% |
| 2023 | 479 | +2.1% | $61,111 | +53.6% |
Source: U.S. Census ACS 5-Year Estimates (Data Commons). Home value and rent are not yet available historically.