Marengo Flag

Marengo

County:
McHenry County
County Seat:
No
Area (mi²):
8.902
State:
Illinois

Marengo is a city located in McHenry County, Illinois. Marengo has a 2026 population of 7,772. Marengo is currently growing at a rate of 0.48% annually and its population has increased by 2.91% since the most recent census, which recorded a population of 7,552 in 2020.

The median household income in Marengo is $73,523 with a poverty rate of 15.74%. The median age in Marengo is 31.9 years: 30.7 years for males, and 33.9 years for females. For every 100 females there are 108.2 males.

7.8K
Total Population
873
Density (mi²)
37 0.48%
Growth

Marengo Population

Marengo Population

Data after 2023 is projected based on recent change

Year ↓
Population
Growth
Annual Change
20267,772370.48%
20257,735360.47%
20247,699791.04%
20237,620530.7%
20227,567-14-0.18%
20217,581150.2%
20207,5521171.57%
20197,435-34-0.46%
20187,46910.01%
20177,468-10-0.13%
20167,478-38-0.51%
20157,516-26-0.34%
20147,542-28-0.37%
20137,570-47-0.62%
20127,617-26-0.34%
20117,643-29-0.38%
20107,672240.31%
20006,3551,58733.28%
19904,7684079.33%
19804,3611262.98%
19704,23566718.69%
19603,56884230.89%
19502,72600%

Median Age

Overall: 31.9 years
Female: 33.9 years
Male: 30.7 years

Marengo Adults

There are 5,210 adults, (1,209 of whom are seniors) in Marengo.

Sex Ratio

Female: 3,381 (48%)
Male: 3,659 (52%)

Demographics

The racial composition of Marengo includes 87.44% White, and smaller percentages for other race, Black or African American, Asian and multiracial populations.

Population by Race

Race
Population ↓
Percentage (of total)
White6,15687.44%
Two or more races75010.65%
Other race1011.43%
Black or African American290.41%
Asian40.06%
Race
Population ↓
Percentage (of total)
Two or more races5487.78%
White1492.12%
Other race1011.43%
Race
Population ↓
Percentage (of total)
White6,00785.33%
Two or more races2022.87%
Black or African American290.41%
Asian40.06%

Marengo Marital Status

Economics and Income Statistics

Marengo 's average per capita income is $62,132. Household income levels show a median of $73,523. The poverty rate stands at 15.74%.

Families: A family includes the owner or renter of the home along with everyone related to them - whether through birth, marriage, or adoption. This includes relatives like spouses, children, parents, siblings, grandparents, and any other family members.
Households: A household includes all the people who occupy a housing unit (such as a house or apartment) as their usual place of residence.
Non Families: A nonfamily household is either someone living alone or when the owner/renter lives with people they aren't related to, like roommates.
Name
Median ↓
Mean
Married Families$125,417-
Families$104,886$105,006
Households$73,523$88,085
Non Families$27,850$47,751

$62,132

Average Income

$73,523

Median Household Income

15.74%

Poverty Rate

Nearby Cities

Sources

  1. US Census State Population Estimates - Most recent state estimates from the Census Bureau's Population Estimates Program
  2. US Census County Population Estimates - Most recent county estimates from the Census Bureau's Population Estimates Program
  3. American Community Survey (2009 - 2013)
  4. Census QuickFacts
  5. Historical Populations of States and Counties (1790 - 1990)