All Countries
Round Lake, IL
Full City Profile · Illinois · McHenry County County
3.7
/5.0
B+
Good
18,588
Population
3,343/sq mi density
$108,965
Median Income
$42,300 per capita
$257,400
Home Value
$317,780 Zillow
$1,494
Median Rent
33.1% income on rent
48°F
Avg Temperature
260 sunny days/yr
88
Violent Crime/100K
657 property/100K
B+
Overall
3.7 / 5.0
Good overall score based on economy, affordability, safety and education
A+
Economy
4.5 / 5.0
$108,965 median income, 4.8% unemployment
A+
Affordability
5.0 / 5.0
$257,400 home value, $1,494/mo rent
F
Safety
1.0 / 5.0
88 violent crimes/100K
A
Education
4.2 / 5.0
40.5% bachelor's degree or higher
Change Over Time (2013–2023)
Population Change
+0.3%
18,522 → 18,575
over 10 years
Annual Pop. Growth
+0.03%
Compound annual growth rate
Median Income Change
+36.9%
$79,574 → $108,965
nominal, not inflation-adjusted
Annual Income Growth
+3.19%
Compound annual growth rate
Population Over Time
Total population for Round Lake 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
18,614
+39 from 2023 (18,575)
Projected Median Income 2030
$135,753
+$26,788 from 2023 ($108,965)
Year-by-Year Detail
| Year | Population | YoY % | Median Income | YoY % |
|---|---|---|---|---|
| 2013 | 18,522 | — | $79,574 | — |
| 2015 | 18,528 | +0% | $72,659 | -8.7% |
| 2017 | 18,395 | -0.7% | $74,011 | +1.9% |
| 2019 | 18,103 | -1.6% | $82,521 | +11.5% |
| 2021 | 18,625 | +2.9% | $86,451 | +4.8% |
| 2023 | 18,575 | -0.3% | $108,965 | +26% |
Source: U.S. Census ACS 5-Year Estimates (Data Commons). Home value and rent are not yet available historically.