Marengo, Illinois Population 2021

7,375
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Marengo is a city located in McHenry County Illinois. With a 2020 population of 7,375, it is the 272nd largest city in Illinois and the 3834th largest city in the United States . Marengo is currently declining at a rate of -0.42% annually and its population has decreased by -3.57% since the most recent census, which recorded a population of 7,648 in 2010. Marengo reached it's highest population of 7,673 in 2010. Spanning over 8 miles, Marengo has a population density of 935 people per square mile.

The average household income in Marengo is $80,315 with a poverty rate of 13.37%. The median rental costs in recent years comes to $912 per month, and the median house value is $154,200. The median age in Marengo is 36.7 years, 36.4 years for males, and 36.9 years for females.

Marengo Demographics

According to the most recent ACS, the racial composition of Marengo was:

  • White: 95.43%
  • Black or African American: 2.25%
  • Two or more races: 1.17%
  • Other race: 1.15%
  • Native American: 0.00%
  • Asian: 0.00%
  • Native Hawaiian or Pacific Islander: 0.00%
The current population of Marengo, Illinois is 7,375 based on our projections of the latest US Census estimates. The US Census estimates the 2018 population at 7,468.The last official US Census in 2010 recorded the population at 7,648.

Marengo, Illinois Population 2021

Population by Race

Race Population Percentage
White7,60595.43%
Black or African American1792.25%
Two or More Races931.17%
Some Other Race921.15%
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Marengo Population by Race

Marengo Population Pyramid $2021

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Marengo Median Age

36.7


Total

36.4


Male

36.9


Female

Marengo Adults

There are 5,883 adults, (1,109 of whom are seniors) in Marengo.

Marengo Age Dependency

66.9

Age Dependency Ratio

23.2

Old Age Dependency Ratio

43.7

Child Dependency Ratio

Marengo Sex Ratio

Female

3,999

50.18%

Male

3,970

49.82%

Marengo Population by Age

Marengo Renter vs Owner Occupied by Household Type

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Marengo Household Types

Type Owner Renter
Married86.9%13.1%
All69.8%30.2%
Non Family64.3%35.7%
Female42.9%57.1%
Male35.5%64.5%

69.8%

Rate of Home Ownership

Marengo Households and Families

Type Count Average Size Owned
All2,9782.6669.8
Married1,4163.4886.9
Non Family9241.1464.3
Female3962.9642.9
Male2423.135.5

3.18

Average Family Size

2.66

Average Household Size

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Marengo Households by Type

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Education Attained Count Percentage
Less Than 9th Grade2033.87%
9th to 12th Grade2474.71%
High School Graduate2,03938.91%
Some College1,28824.58%
Associates Degree3366.41%
Bachelors Degree70313.42%
Graduate Degree4248.09%
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Marengo Educational Attainment by Sex (over 25)

Marengo Educational Attainment by Race

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Race Total High School Bachelors
White4,2534,014974
Hispanic868666153
Black6859
Other Race6464
2+ Races6161

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

The highest rate of bachelors degrees is among white people with a rate of 22.90%.

Marengo Educational Attainment by Race

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Name Average Male Female
Overall$43,520$52,434$26,728
Less Than 9th Grade$21,506$26,058$20,446
High School Graduate$34,673$45,382$19,934
Some College$51,452$60,270$30,708
Bachelors Degree$53,490$54,948$42,045
Graduate Degree$69,426$68,322$71,771

$43,520

Average Earnings

$52,434

Average Male

$26,728

Average Female

Marengo Earnings by Educational Attainment

Marengo Language by Age

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Marengo Language

87.26% of Marengo residents speak only English, while 12.74% speak other languages. The non-English language spoken by the largest group is Spanish, which is spoken by 10.92% of the population.

Marengo Language

Marengo Poverty by Race

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Name Total In Poverty Poverty Rate
White6,19673911.93%
Hispanic1,39121715.60%
Other926166.30%
Black1704928.82%
Multiple934346.24%

13.37%

Overall Poverty Rate

11.93%

Male Poverty Rate

14.81%

Female Poverty Rate

Poverty in Marengo

The race most likely to be in poverty in Marengo is Other, with 66.30% below the poverty level.

The race least likely to be in poverty in Marengo is White, with 11.93% below the poverty level.

The poverty rate among those that worked full-time for the past 12 months was 2.37%. Among those working part-time, it was 16.78%, and for those that did not work, the poverty rate was 19.90%.

Marengo Poverty

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Name Poverty
Less Than 9th Grade19.17%
High School14.48%
Some College10.65%
Bachelors or Greater2.04%

Marengo Poverty Rate by Education

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Rate Poverty
Female Unemployed66.67%
Female Employed8.41%
Male Unemployed4.44%
Male Employed3.42%

Marengo Poverty Rate by Employment Status and Sex

Marengo Income by Household Type

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Name Median Mean
Households$63,694$80,315
Families$91,481$95,591
Married Families$107,273-
Non Families$38,069$42,704
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Income by Household Type

Marengo Marital Status

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Marriage Rates

50.1%

Overall Marriage Rate

49.7%

Male Marriage Rate

50.4%

Female Marriage Rate

Marengo Married by Age and Sex

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Marengo Marriage

The age group where males are most likely to be married is 35-44, while the female age group most likely to be married is 35-44.

Marengo Marital Status by Race

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Marengo Marital Status

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504

Number of Veterans

504

Male Veterans

Female Veterans

War Veterans
Vietnam102
First Gulf War79
Korea56
Second Gulf War55
World War II

Marengo Veterans by War

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Age Group Veterans
75+170
35 to 54140
65 to 7493
55 to 6465
18 to 3436

Marengo Veterans by Age

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Name Veterans % of Total
White5048.94%
Hispanic808.15%

Marengo Veterans by Race

Marengo Veterans by Education

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0.00%

Veteran Poverty Rate

26.59%

Veteran Disability Rate

Marengo Veterans by Education

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70.9%

Labor Force Participation

69.5%

Employment Rate

1.9%

Unemployment Rate

Marengo Employment by Age

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Marengo Employment by Race

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Marengo 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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75.04%

Born in Marengo

91.98%

Native Born

8.02%

Foreign Born

2.90%

Non Citizen

5.12%

Naturalized

Place of Birth

91.98% of Marengo residents were born in the United States, with 75.04% having been born in Illinois. 2.90% of residents are not US citizens. Of those not born in the United States, the largest percentage are from Latin America.

Marengo Place of Birth

Year Population Growth Annual Growth Rate
20217,375-31-0.42%
20207,406-31-0.42%
20197,437-31-0.42%
20187,46820.03%
20177,466-12-0.16%
20167,478-36-0.48%
20157,514-26-0.34%
20147,540-31-0.41%
20137,571-47-0.62%
20127,618-25-0.33%
20117,643-30-0.39%
20107,6731,3181.90%
20006,3551,5872.91%
19904,7684070.90%
19804,3611260.29%
19704,2356671.73%
19603,5688422.73%
19502,7260.00%

Marengo Population by Year