Mchenry, IL

City in McHenry County, IL, US

By Neilsberg Research

Last updated May 1, 2026

Key Indicators

A quick look at key numbers

Population

28,074

Source: U.S. Census Bureau American Community Survey (ACS) 2020-2024 5-Year Estimates

Median Age

43.9

years ∙ half population younger than 43.9, half older

Diversity Index

34.8%

chance two random people differ in race and ethnicity

Nativity

8.4%

foreign-born population

91.6%Native

8.4% Foreign-born

Geographic Context

Location, size, and surroundings

About

Mchenry is a city within McHenry County, Illinois, United States.

Location

City in McHenry County, IL, US

Co-ordinates

DEC42.336204° N, 88.291651° W

DMS42° 20′ 10.33″ N, 88° 17′ 29.94″ W

Population Density & area

1,897/sq mi (731.1/km²)

Total Area

15.2 sq mi (39.5 km²)

Land Area

14.8 sq mi (38.4 km²) · 97.2%

Water Area

0.4 sq mi (1.1 km²) · 2.8%

Demographics & Living

Who lives here, how households are formed, and community composition

Population Composition

Key characteristics of the population

Sex Distribution

49.8% male

Male 49.8%

Female 50.2%

males per 100 females

Mchenry 99.1

McHenry County 100.5

Illinois 97.7

Nativity

8.4%

foreign-born population

91.6%Native

8.4% Foreign-born

% Foreign-born

Mchenry 8.4%

McHenry County 9.9%

Illinois 14.7%

Age Distribution

How the population is spread across age groups

Median Age

43.9

years ∙ half population younger than 43.9, half older

Mchenry

43.9

McHenry County

40.7

Illinois

Dependency ratio

64.2

dependents per 100 working-age adults

Mchenry 64.2

McHenry County 64.5

Illinois 63.5

AGE DISTRIBUTION

Distribution of age group

Median age

	Mchenry	McHenry County	Illinois
Age Group
Children (Under 18)	19.8%	22.7%	21.8%
Working age (18-64)	60.9%	60.8%	61.2%
Senior (65+)	19.3%	16.5%	17%
Dependency ratio
Total dependency ratio	64.2	64.5	63.5
Child dependency ratio	32.6	37.4	35.7
Old-age dependency ratio	31.6	27.1	27.8

Racial & Ethnic Composition

Racial and ethnic makeup and how it compares

Race & Ethnicity

White

79.1%

Black

0.6%

Asian

1.7%

Hispanic

15.8%

Other

2.8%

Note: White, Black, and Asian refer to individuals belonging to a single race and not of Hispanic origin. Hispanics may be of any race.

Diversity Index

34.8%

chance two random people differ in race and ethnicity

Mchenry 34.8%

McHenry County 39.3%

Illinois 60.5%

Note: The Diversity Index (DI), based on the Blau Index, measures the probability that two randomly selected individuals differ in race and ethnicity. Values range from 0 (no diversity) to 1 (high diversity) and are shown as percentages.

RACIAL & ETHNIC COMPOSITION

Race & Ethnicity

Percentage of Mchenry population

Racial and ethnic composition — Mchenry vs McHenry County vs Illinois. Source: ACS 2020-2024 5-Year Estimates.
	Mchenry	McHenry County	Illinois
Hispanic or Latino	15.8%	16.1%	18.8%
Mexican	12.8%	12.6%	14.4%
Puerto Rican	1.4%	1.3%	1.6%
Cuban	0.1%	0.3%	0.3%
Other Hispanic / Latino	1.6%	1.8%	2.5%
Not Hispanic or Latino	84.2%	83.9%	81.2%
One race	81.5%	80.7%	77.8%
White	79.1%	76.1%	58.1%
Black or African American	0.6%	1.4%	13.3%
American Indian and Alaska Native	0%	0%	0.1%
Asian	1.7%	3%	5.9%
Native Hawaiian and Other Pacific Islander	0.1%	0%	0%
Some Other Race	0%	0.2%	0.4%
Two or more races (Multiracial)	2.7%	3.2%	3.4%

Household & Families Composition

Household size, type, and family structure

Household structure

62.7% family

Family 62.7%

Non family 37.3%

% family households

Mchenry 62.7%

McHenry County 71.9%

Illinois 62.2%

Average household size

2.33

persons per household

Mchenry

2.33

McHenry County

2.64

Illinois

2.46

Household & Family COMPOSITION

Households

Percentage of Mchenry population

	Mchenry	McHenry County	Illinois
Total households	11,897	117,594	5,036,449
Average houshold size	2.33	2.64	2.46
Family households	7,462	84,562	3,130,978
Average family size	2.98	3.13	3.14
Married couple family	5,756	67,264	2,282,435
Other families	1,706	17,298	848,543
Male householder	512	5,803	248,521
Female householder	1,194	11,495	600,022
Non-family households	4,435	33,032	1,905,471
One-person households	3,630	26,662	1,569,881
Male householder	1,705	12,619	712,191
Senior (65+) living alone	422	4,589	210,051
Female householder	1,925	14,043	857,690
Senior (65+) living alone	1,248	8,200	417,870
Other living arrangements	805	6,370	335,590

Housing Profile

Housing stock, ownership, rentals, and cost burdens

Total housing units

12,095

housing units

Mchenry 12,095

McHenry County 121,329

Illinois 5,457,452

Occupancy status

98.4% occupied

Occupied 98.4%

Vacant 1.6%

vacancy rate

Mchenry 1.6%

McHenry County 3.1%

Illinois 7.7%

Housing Characteristics

How the housing supply is structured and used

Types of Housing unit

79.8%

Single family houses

79.8%

Apartments in multi-unit structures

19.9%

Mobile homes

0.1%

Boat, RV, van, etc

0.2%

Median Year Built

1988

Half of houses were built before 1988, and half after.

Historic ∙ 1939 or earlier

2.9%

Postwar & mid-century ∙ 1940 - 1969

17.4%

Late 20th century ∙ 1970 - 1999

52.4%

Modern ∙ 2000 or later

27.2%

Note: Median year built reflects occupied units only; distribution includes all units.

Housing Characteristics

Units, rooms & bedrooms

Physical characteristics of housing units

	Mchenry	McHenry County	Illinois
Rooms per unit
Median rooms	5.9	6.5	5.6
1–3 rooms	11.9%	6.6%	14.6%
4–6 rooms	47.3%	42.8%	50.9%
7+ rooms	40.7%	50.6%	34.6%
Bedrooms
No bedroom / studio	1.4%	1%	3.1%
1 bedroom	8.8%	5.4%	11.5%
2 bedrooms	29.7%	20.9%	27.7%
3 bedrooms	37.6%	39.8%	35.8%
4+ bedrooms	22.5%	32.9%	21.7%
At a glance
Median year built	1988	1989	1971
Total housing units	12,095	121,329	5,457,452

Occupancy Profile

Who is inside and how they use it

Homeownership

74.4% owners

Renter-occupied 25.6%

Owner-occupied 74.4%

homeownership rate

Mchenry 74.4%

McHenry County 82.7%

Illinois 67.1%

Average household size

2.45

Owner-occupied

1.98

Renter-occupied

owner-occupied average size

Mchenry 2.45

McHenry County 2.71

Illinois 2.62

Housing Characteristics

Occupied unit characteristics

Tenure, crowding, and utilities

	Mchenry	McHenry County	Illinois
Total occupied units	11,897	117,594	5,036,449
Year moved in
2020 or later	22.9%	19.6%	23.3%
2010 to 2019	40.5%	38.4%	38.1%
2000 to 2009	19.1%	21%	17.3%
1999 or earlier	17.6%	21%	21.3%
Occupants per room
1.00 or fewer	98.4%	98.5%	97.5%
1.01 to 1.50	1.2%	1.2%	1.6%
1.51 or more	0.4%	0.3%	0.8%
Vehicles availability
No vehicles	6.5%	3.5%	11%
1 vehicle	30.4%	26.5%	35.7%
2 vehicles	42.2%	44%	35.1%
3 or more vehicles	20.9%	26%	18.3%
House heating fuel used
Gas	84.7%	87.6%	79.5%
Electricity	14.4%	11.7%	18.6%
Solar	0%	0.1%	0.1%
Fuel oil, kerosene etc	0%	0%	0.1%
All other fuels	0.6%	0.3%	0.8%
No fuel used	0.2%	0.3%	0.8%
Selected characteristics
Lacking complete plumbing	0.1%	0.2%	0.3%
Lacking complete kitchen	0.5%	0.5%	0.8%
No telephone service available	0.3%	0.4%	0.8%

Housing Value

What owner-occupied units are worth

Median home value

$266,500

owner-occupied units

Median value(USD)

Mchenry

$266,500

McHenry County

$308,100

Illinois

$263,300

Housing Cost Burden

27.1%

of homeowners with a mortgage are cost-burdened

% Cost-Burdened Households

Owners with a mortgage

27.1%

Owners without a mortgage

15.1%

Renters

50.8%

Note: Households spending 30% or more of their income on housing costs are considered cost-burdened.

Financial characteristics

Property value and housing costs

Tenure, crowding, and utilities

	Mchenry	McHenry County	Illinois
Property value
Median Value	$266,500	$308,100	$263,300
Under $100,000	4.2%	4.1%	13.7%
$100,000 - $200,000	18.5%	14.8%	21.5%
$200,000 - $300,000	40.6%	29%	22.3%
$300,000 - $500,000	32.9%	42.2%	27.7%
$500,000 - $1,000,000	3.4%	9.2%	12.1%
$1,000,000 and more	0.3%	0.8%	2.7%
Owner-occupied households
With a mortgage	68%	68%	60.8%
Without a mortgage	32%	32%	39.2%
Median monthly owner costs
With a mortgage	$1,908	$2,137	$1,987
Without a mortgage	$845	$945	$792
Gross rent
Median rent	$1,553	$1,401	$1,274

Education Profile

How educated is the community and how education pays off

Adults with a college degree

25.7%

of adults 25+ with a bachelor's degree or higher

Mchenry 25.7%

McHenry County 35.2%

Illinois 37.8%

Adults without a high school diploma

8.4%

of adults (25+) without a high school diploma

Mchenry 8.4%

McHenry County 6.4%

Illinois 9.6%

School Enrollment

Who is enrolled in school and at what level

School enrollment

5,672

population (age 3+) enrolled in school

Nursery / Preschool

4.1%

K–12

71.4%

College / Undergraduate

17.7%

Graduate / Professional

6.8%

College-going rate (18-24 yr olds)

42.4%

of 18-24-year-olds in college or graduate school

Mchenry

42.4%

McHenry County

36.8%

Illinois

41.4%

Enrollment & school type

Enrollment levels, college-going rate, and public vs private school split

Population 3+ currently enrolled in a school

	Mchenry	McHenry County	Illinois
Total enrolled (age 3+)	5,672	74,184	3,051,569
Nursery / preschool	4.1%	5.8%	6.3%
K–12	71.4%	73%	67.3%
Kindergarten	5.4%	5.2%	4.9%
Elementary: Grades 1–4	22.6%	20.1%	19.5%
Elementary: Grades 5–8	21.3%	23%	20.8%
High School: Grades 9–12	22.2%	24.7%	22.1%
College or graduate school	24.5%	21.3%	26.4%
College, undergraduate	17.7%	16.8%	19.8%
Graduate, professional school	6.8%	4.5%	6.6%
College-going rate · 18-24 yr olds	42.4%	36.8%	41.4%
School type
Public school	87.6%	87.2%	80.5%
Private school	12.4%	12.8%	19.5%

Education Attainment by Level & Gender

What is the highest level of education completed among adults

Education attainment

20,808

population 25 years and over

Total adults (25+)

Less than 9th grade

4.9%

9th-12th, no diploma

3.5%

HS graduate

32.9%

Some college no degree

25.3%

Associates degree

7.8%

Bachelors degree

18%

Graduate or professional degree

7.7%

Attainment by gender

Male vs Female

Adults (25+) · Share within each education level

% male · % female

Less than 9th grade

46.5% · 53.5%

9th-12th, no diploma

64.3% · 35.7%

HS graduate

48.4% · 51.6%

Some college no degree

51.1% · 48.9%

Associates degree

44.9% · 55.1%

Bachelors degree

40.1% · 59.9%

Graduate or professional degree

43.5% · 56.5%

Educational Attainment Overview

Distribution and key education attainment rates for adults (25+)

Highest credential completed · adults 25+

	Mchenry	McHenry County	Illinois
Population (25+)	20,808	216,281	8,767,004
Less than 9th grade	4.9%	2.8%	4.6%
9th–12th, no diploma	3.5%	3.6%	5%
High school diploma or GED	32.9%	26.7%	25.1%
Some college, no degree	25.3%	22.4%	19.2%
Associate's degree	7.8%	9.3%	8.3%
Bachelor's degree or higher	25.7%	35.2%	37.8%
Bachelor's degree	18%	23.2%	22.6%
Graduate or professional	7.7%	12%	15.3%
High School or higher	91.6%	93.7%	90.5%

Earnings by education level

percentage as applicable

Median Earnings

$57,261

Median earnings for adults 25+, by level

Less than HS graduate

$35,673

HS graduate

$47,961

Some college or associates

$58,423

Bachelors degree

$68,960

Graduate or professional degree

$78,629

Poverty Rate

2.2%

for ages 25+, with bachelors degree or higher

Less than HS graduate

HS graduate

5.2%

Some college or associates

Bachelors degree or higher

2.2%

Outcomes by Education Level

Earnings and poverty rates across education levels (25+)

Adults 25+

	Mchenry	McHenry County	Illinois
Median earnings
Population 25+, with earnings	$57,261	$60,427	$55,582
Less than high school graduate	$35,673	$34,684	$34,655
High school graduate (includes equivalency)	$47,961	$47,168	$40,965
Some college or associate's degree	$58,423	$54,525	$47,813
Bachelor's degree	$68,960	$78,656	$73,326
Graduate or professional degree	$78,629	$94,416	$91,623
Poverty rates
Less than high school graduate	6%	14.6%	21.6%
High school graduate (includes equivalency)	5.2%	8.7%	14.4%
Some college or associate's degree	4%	4.9%	9.9%
Bachelor's degree or higher	2.2%	2.2%	4.5%

Insights for Mchenry, by topic

Income By year By race By age By gender

Population By year By race By age By gender

About Neilsberg Research

Neilsberg Research team are data scientists with expertise in processing, analysis and visualization of big data helping small businesses make right decisions.

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