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 2025 population of 7,735 . Marengo is currently growing at a rate of 0.47% annually and its population has increased by 2.42% since the most recent census, which recorded a population of 7,552 in 2020.

The average household income in Marengo is $88,436 with a poverty rate of 15.55%. The median age in Marengo is 33.3 years: 32.7 years for males, and 33.9 years for females. For every 100 females there are 109.4 males.

7.7K
Total Population
869
Density (mi²)
36 0.47%
Growth

Marengo Population

Marengo Population

Data after 2023 is projected based on recent change

Demographics

The racial composition of Marengo includes 92.03% White, and smaller percentages for other race, Black or African American and multiracial populations.

Population by Race

White (92.03%)

Two or more races (5.24%)

Other race (1.46%)

Black or African American (1.28%)

Race
Population
Percentage (of total)
White6,55592.03%
Two or more races3735.24%
Other race1041.46%
Black or African American911.28%

Marengo Marital Status

OverallMalesFemales0%10%20%30%40%50%60%70%80%90%100%

Married

Widowed

Divorced

Separated

Never Married

Economics and Income Statistics

Marengo's average per capita income is $56,276. Household income levels show a median of $72,586. The poverty rate stands at 15.55%.

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$132,681-
Families$112,866$106,243
Households$72,586$88,436
Non Families$34,602$50,516

$56,276

Average Income

$72,586

Median Household Income

15.55%

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)