All Countries
Marengo, IL
Full City Profile · Illinois · McHenry County County
2.9
/5.0
C+
Fair
7,123
Population
800/sq mi density
$72,586
Median Income
$35,638 per capita
$206,100
Home Value
$345,185 Zillow
$1,077
Median Rent
33.7% income on rent
48°F
Avg Temperature
260 sunny days/yr
173
Violent Crime/100K
933 property/100K
C+
Overall
2.9 / 5.0
Fair overall score based on economy, affordability, safety and education
B
Economy
3.3 / 5.0
$72,586 median income, 5.8% unemployment
A+
Affordability
5.0 / 5.0
$206,100 home value, $1,077/mo rent
F
Safety
1.0 / 5.0
173 violent crimes/100K
C
Education
2.3 / 5.0
16.5% bachelor's degree or higher
Change Over Time (2013–2023)
Population Change
+0.7%
7,570 → 7,620
over 10 years
Annual Pop. Growth
+0.07%
Compound annual growth rate
Median Income Change
+36.3%
$53,260 → $72,586
nominal, not inflation-adjusted
Annual Income Growth
+3.14%
Compound annual growth rate
Population Over Time
Total population for Marengo 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
7,657
+37 from 2023 (7,620)
Projected Median Income 2030
$90,124
+$17,538 from 2023 ($72,586)
Year-by-Year Detail
| Year | Population | YoY % | Median Income | YoY % |
|---|---|---|---|---|
| 2013 | 7,570 | — | $53,260 | — |
| 2015 | 7,516 | -0.7% | $57,955 | +8.8% |
| 2017 | 7,468 | -0.6% | $61,250 | +5.7% |
| 2019 | 7,435 | -0.4% | $63,694 | +4% |
| 2021 | 7,572 | +1.8% | $65,136 | +2.3% |
| 2023 | 7,620 | +0.6% | $72,586 | +11.4% |
Source: U.S. Census ACS 5-Year Estimates (Data Commons). Home value and rent are not yet available historically.