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St. Johns, IL
Full City Profile · Illinois · Perry County County
2.9
/5.0
C+
Fair
134
Population
184/sq mi density
$39,286
Median Income
$25,780 per capita
$80,000
Home Value
$112,669 Zillow
$760
Median Rent
32.5% income on rent
55°F
Avg Temperature
293 sunny days/yr
219
Violent Crime/100K
1,598 property/100K
C+
Overall
2.9 / 5.0
Fair overall score based on economy, affordability, safety and education
B+
Economy
3.6 / 5.0
$39,286 median income, 3.4% unemployment
A+
Affordability
5.0 / 5.0
$80,000 home value, $760/mo rent
F
Safety
1.0 / 5.0
219 violent crimes/100K
C
Education
2.1 / 5.0
13.6% bachelor's degree or higher
Change Over Time (2013–2023)
Population Change
-26%
215 → 159
over 10 years
Annual Pop. Growth
-2.97%
Compound annual growth rate
Median Income Change
-12.7%
$45,000 → $39,286
nominal, not inflation-adjusted
Annual Income Growth
-1.35%
Compound annual growth rate
Population Over Time
Total population for St. Johns 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
129
-30 from 2023 (159)
Projected Median Income 2030
$35,720
$-3,566 from 2023 ($39,286)
Year-by-Year Detail
| Year | Population | YoY % | Median Income | YoY % |
|---|---|---|---|---|
| 2013 | 215 | — | $45,000 | — |
| 2015 | 212 | -1.4% | $50,156 | +11.5% |
| 2017 | 211 | -0.5% | $48,750 | -2.8% |
| 2019 | 210 | -0.5% | $34,722 | -28.8% |
| 2021 | 160 | -23.8% | $36,250 | +4.4% |
| 2023 | 159 | -0.6% | $39,286 | +8.4% |
Source: U.S. Census ACS 5-Year Estimates (Data Commons). Home value and rent are not yet available historically.