McHenry County, Illinois Population 2021

McHenry County, Illinois's estimated population is 306,820 with a growth rate of -0.16% in the past year according to the most recent United States census data. McHenry County, Illinois is the 7th largest county in Illinois. The 2010 Population was 309,112 and has seen a growth of -0.74% since this time.

Note: 2020 and 2021 data is projected
Year Population Growth Growth Rate
2021306,820-477-0.16%
2020307,297-477-0.15%
2019307,774-477-0.15%
2018308,2514360.14%
2017307,8156560.21%
2016307,159-413-0.13%
2015307,5721680.05%
2014307,404-201-0.07%
2013307,605-625-0.20%
2012308,230-274-0.09%
2011308,504-608-0.20%
2010309,112125,87168.69%
1990183,24135,34423.90%
1980147,89736,34232.58%
1970111,55527,34532.47%
196084,21033,55466.24%
195050,65613,34535.77%
194037,3112,2326.36%
193035,0791,9155.77%
192033,1646552.01%
191032,5092,7509.24%
190029,7593,64513.96%
189026,1141,2064.84%
188024,9081,1464.82%
187023,7621,6737.57%
186022,0897,11147.48%
185014,97812,400480.99%
18402,5780.00%
2021 Growth Rate
-0.16%
County Website
Founded
January 16th, 1836
County Seat
2010 Population
309,112
Growth Since 2010
-0.74%
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McHenry County, Illinois Population Growth

Population by Race

Race Population Percentage
White284,00992.30%
Asian8,6012.80%
Two or More Races5,9571.94%
Black or African American4,4811.46%
Some Other Race4,3151.40%
American Indian and Alaska Native2950.10%
Native Hawaiian and Other Pacific Islander560.02%
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McHenry County, Illinois Population by Race

McHenry County, Illinois Population Pyramid $2021

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McHenry County, Illinois Median Age

40.2


Total

39.2


Male

41.1


Female

McHenry County, Illinois Adults

There are 234,370 adults, (43,124 of whom are seniors) in McHenry County, Illinois.

McHenry County, Illinois Age Dependency

60.9

Age Dependency Ratio

22.5

Old Age Dependency Ratio

38.4

Child Dependency Ratio

McHenry County, Illinois Sex Ratio

Female

154,419

50.18%

Male

153,295

49.82%

McHenry County, Illinois Population by Age

McHenry County, Illinois Renter vs Owner Occupied by Household Type

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McHenry County, Illinois Household Types

Type Owner Renter
Married88.9%11.1%
All79.4%20.6%
Male67.8%32.2%
Non Family66.5%33.5%
Female59.8%40.2%

79.4%

Rate of Home Ownership

McHenry County, Illinois Households and Families

Type Count Average Size Owned
All112,4532.7279.4
Married67,7073.2688.9
Non Family29,0731.2466.5
Female10,7893.0859.8
Male4,8843.2367.8

3.16

Average Family Size

2.72

Average Household Size

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McHenry County, Illinois Households by Type

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Education Attained Count Percentage
Less Than 9th Grade5,9382.85%
9th to 12th Grade8,3324.00%
High School Graduate55,17526.50%
Some College47,49722.81%
Associates Degree19,5389.38%
Bachelors Degree48,22623.16%
Graduate Degree23,48211.28%
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McHenry County, Illinois Educational Attainment by Sex (over 25)

McHenry County, Illinois Educational Attainment by Race

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Race Total High School Bachelors
White176,953169,74763,149
Hispanic20,91814,9983,203
Asian5,9705,1083,493
Other Race2,6911,625274
Black2,6282,4901,147
2+ Races2,0201,858736
Native American25020534
Islander55

The highest rate of high school graduation is among islander people with a rate of 100.00%.

The highest rate of bachelors degrees is among asian people with a rate of 58.51%.

McHenry County, Illinois Educational Attainment by Race

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Name Average Male Female
Overall$49,301$61,571$38,164
Less Than 9th Grade$26,845$32,008$20,850
High School Graduate$40,299$48,301$30,055
Some College$44,647$58,655$33,266
Bachelors Degree$64,905$84,889$47,906
Graduate Degree$76,930$103,800$62,013

$49,301

Average Earnings

$61,571

Average Male

$38,164

Average Female

McHenry County, Illinois Earnings by Educational Attainment

McHenry County, Illinois Language by Age

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McHenry County, Illinois Language

85.83% of McHenry County, Illinois residents speak only English, while 14.17% speak other languages. The non-English language spoken by the largest group is Spanish, which is spoken by 8.86% of the population.

McHenry County, Illinois Language

McHenry County, Illinois Poverty by Race

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Name Total In Poverty Poverty Rate
White247,82012,8515.19%
Hispanic39,5596,56116.59%
Other4,29595322.19%
Black4,38472716.58%
Multiple5,9005829.86%
Asian8,5735816.78%
Native295289.49%
Islander561119.64%

6.97%

Overall Poverty Rate

6.58%

Male Poverty Rate

7.36%

Female Poverty Rate

Poverty in McHenry County, Illinois

The race most likely to be in poverty in McHenry County, Illinois is Other, with 22.19% below the poverty level.

The race least likely to be in poverty in McHenry County, Illinois is White, with 5.19% below the poverty level.

The poverty rate among those that worked full-time for the past 12 months was 1.28%. Among those working part-time, it was 8.19%, and for those that did not work, the poverty rate was 12.38%.

McHenry County, Illinois Poverty

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Name Poverty
Less Than 9th Grade17.31%
High School7.67%
Some College5.44%
Bachelors or Greater2.21%

McHenry County, Illinois Poverty Rate by Education

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Rate Poverty
Male Unemployed19.53%
Female Unemployed15.15%
Female Employed3.95%
Male Employed2.54%

McHenry County, Illinois Poverty Rate by Employment Status and Sex

McHenry County, Illinois Income by Household Type

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Name Median Mean
Households$86,799$105,240
Families$100,294$118,193
Married Families$111,323$129,686
Non Families$47,129$62,323
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Income by Household Type

McHenry County, Illinois Marital Status

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Marriage Rates

57.0%

Overall Marriage Rate

57.8%

Male Marriage Rate

56.2%

Female Marriage Rate

McHenry County, Illinois Married by Age and Sex

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McHenry County, Illinois Marriage

The age group where males are most likely to be married is 55-64, while the female age group most likely to be married is 45-54.

McHenry County, Illinois Marital Status by Race

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McHenry County, Illinois Marital Status

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14,529

Number of Veterans

13,545

Male Veterans

984

Female Veterans

War Veterans
Vietnam5,556
First Gulf War2,725
Second Gulf War2,419
Korea1,083
World War II587

McHenry County, Illinois Veterans by War

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Age Group Veterans
65 to 744,505
75+3,393
35 to 543,228
55 to 642,060
18 to 341,343

McHenry County, Illinois Veterans by Age

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Name Veterans % of Total
White14,0426.43%
Hispanic6152.41%
Black1564.88%
2+ Races1515.33%
Asian1161.74%
Other Race361.16%
Native American2811.20%

McHenry County, Illinois Veterans by Race

McHenry County, Illinois Veterans by Education

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3.60%

Veteran Poverty Rate

26.45%

Veteran Disability Rate

McHenry County, Illinois Veterans by Education

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70.4%

Labor Force Participation

67.5%

Employment Rate

4.1%

Unemployment Rate

McHenry County, Illinois Employment by Age

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McHenry County, Illinois Employment by Race

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McHenry County, Illinois Employment by Education

Origin of Non-Citizens

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Non citizens include legal permanent residents (green card holders), international students, temporary workers, humanitarian migrants, and illegal immigrants.

Origin of Naturalized Citizens

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73.21%

Born in McHenry County, Illinois

90.70%

Native Born

9.30%

Foreign Born

4.14%

Non Citizen

5.16%

Naturalized

Place of Birth

90.70% of McHenry County, Illinois residents were born in the United States, with 73.21% having been born in Illinois. 4.14% of residents are not US citizens. Of those not born in the United States, the largest percentage are from Latin America.

McHenry County, Illinois Place of Birth

  1. US Census City/Town Population estimates - Most recent state estimates from the Census Bureau's Population Estimates Program
  2. Population of States and Counties of the United States: 1790 - 1990

Sources