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
Get McHenry's next ACS population data
Subscribe for Population Review updates by email. No spam, unsubscribe anytime.
McHenry covers 14.8 sq mi of land at 1873 people per square mile.
About McHenry, IL
The poverty rate is what most separates McHenry from the typical city: 1.6% of residents live below the federal poverty line, against 12.4% nationally. With 27,774 residents, McHenry is a city in Illinois.
Median household income is $86,865, above the US median of $78,538. Very few residents live in poverty — 1.6%, below the national 12.4%. The typical home is valued at $244,900, with typical rent around $1,508.
Degree attainment is mid-range for US cities: 25.5% of adults hold a four-year degree, below the national 35.0%. Around 12.4% of workers work from home, below the national 14.0%, and the average commute runs about 31 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).
Where to stay in McHenry
Visiting or relocating to McHenry, IL? Compare hotels and short-term rentals across the metro — live availability and prices.
Availability and prices from Stay22 partners (Booking.com, Vrbo, Expedia). We may earn a commission from bookings, at no extra cost to you.
More from Illinois
Population 2,707,648
Population 179,867
Population 149,785
Population 149,424
Population 147,649
Full rankings of Illinois cities by population
Statewide data for Illinois
Population, race, income, age, and trends across Illinois
Data from the American Community Survey (ACS) 5-Year estimates.
Source: U.S. Census Bureau ACS, 2026.