McHenry, Illinois Population 2026
Updated April 2026 · US Census ACS 2023 5-Year Estimates
The population of McHenry, Illinois is 27,774 as of the 2023 American Community Survey, making it the 74th-largest city in Illinois. The median household income is $86,865, the median home value is $244,900, and the median age is 43.5.
The population has grown 6.5% since 2010 (27,059 → 28,825).
27,774
Population
1873
People / sq mi
$86,865
Median Income
$244,900
Median Home Value
McHenry covers 14.8 sq mi of land at 1873 people per square mile.
About McHenry, IL
McHenry is a city in Illinois with a population of 27,774. It ranks #74 among cities in Illinois by population. The median age is 43.5, older than the national median. The population is 50.5% male and 49.5% female.
The median household income in McHenry is $86,865, above the US median of $74,580. 1.6% of residents live below the federal poverty level. Home values sit at a median of $244,900, with monthly rent averaging $1,508. The homeownership rate of 73.4% is higher than the national rate of 64.8%.
Educational attainment in McHenry reflects 25.5% of adults 25 and older holding a bachelor's degree or higher, below the national average of 34.3%. Roughly 12.4% of workers primarily work from home, similar to the national work-from-home rate of 14.2%. The average commute is 30.8 minutes each way.
McHenry city Population History (2010-2024)
The city of McHenry city had a population of 27,059 in 2010 and 28,825 in 2024, a 6.5% growth over 14 years. The peak was 28,825 in 2024. Average annual growth rate: 0.46%.
28,825
Population (2024)
27,059
Population (2010)
28,825
Peak (2024)
0.46%
Avg Annual Growth
| Year | Population |
|---|---|
| 2010 | 27,059 |
| 2011 | 26,960 |
| 2012 | 26,865 |
| 2013 | 26,701 |
| 2014 | 26,634 |
| 2015 | 26,631 |
| 2016 | 26,634 |
| 2017 | 26,810 |
| 2018 | 27,005 |
| 2019 | 27,061 |
| 2020 | 27,349 |
| 2021 | 27,611 |
| 2022 | 28,262 |
| 2023 | 28,302 |
| 2024 | 28,825 |
Race & Ethnicity
| White | 84.5% |
| Black or African American | 0.7% |
| Asian | 0.0% |
| Hispanic or Latino (any race) | 2.1% |
| Two or More Races | 0.0% |
Economy & Income
$86,865
Median Household Income
$47,096
Per Capita Income
1.6%
Poverty Rate
2.4%
Unemployment Rate
Housing
$244,900
Median Home Value
$1,508
Median Rent
73.4%
Owner-Occupied
Education
90.8%
High School+
25.5%
Bachelor's+
Commute
1.5%
Drive Alone
76.7%
Public Transit
12.4%
Work From Home
30.8 min
Avg Commute
Community Profile
15.7%
Foreign Born
84.2%
Non-English at Home
6.5%
Veterans
12.5%
With Disability
95.2%
Health Insurance
96.5%
Internet Access
Employment by Industry
| Professional, Scientific & Management | 16.4% |
| Manufacturing | 15.7% |
| Education, Health Care & Social Services | 9.4% |
| Finance, Insurance & Real Estate | 8.9% |
| Construction | 8.3% |
| Retail Trade | 5.4% |
| Information | 5.4% |
| Public Administration | 4.5% |
| Arts, Entertainment & Food Services | 4.3% |
| Transportation & Warehousing | 1.6% |
| Agriculture & Mining | 0.5% |
Largest cities in Illinois
Largest counties in Illinois
Part of Illinois
Metro areas in Illinois
City rankings
Frequently Asked Questions
McHenry, Illinois has a population of 27,774 according to the US Census Bureau's 2023 American Community Survey 5-year estimates, making it the 74th-largest city in Illinois.
The median household income in McHenry, Illinois is $86,865, with 1.6% of residents living below the federal poverty level.
The median home value in McHenry, Illinois is $244,900, with median monthly rent at $1,508 and a homeownership rate of 73.4%.
The median age in McHenry, Illinois is 43.5 years. The population is 50.5% male and 49.5% female.
The population has grown 6.5% since 2010 (27,059 → 28,825).
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Data from the American Community Survey (ACS) 5-Year estimates.
Source: U.S. Census Bureau ACS, 2026.