Marengo Flag

Marengo

County:
McHenry County
County Seat:
No
Area (mi²):
35.949
State:
Illinois

Marengo is located in McHenry County, Illinois. Marengo has a 2025 population of 7,385 . Marengo is currently growing at a rate of 0.87% annually and its population has increased by 2.41% since the most recent census, which recorded a population of 7,211 in 2020.

The average household income in Marengo is $93,830 with a poverty rate of 12.48%. The median age in Marengo is 35.1 years: 32.6 years for males, and 36.3 years for females. For every 100 females there are 114.0 males.

7.4K
Total Population
205
Density (mi²)
64 0.87%
Growth

Marengo Population

Marengo Population

Data after 2023 is projected based on recent change

Demographics

The racial composition of Marengo includes 92.78% White, and smaller percentages for other race, Black or African American and multiracial populations.

Population by Race

White (92.78%)

Two or more races (5.05%)

Other race (1.69%)

Black or African American (0.48%)

Race
Population
Percentage (of total)
White6,71292.78%
Two or more races3655.05%
Other race1221.69%
Black or African American350.48%

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 $58,790. Household income levels show a median of $75,104. The poverty rate stands at 12.48%.

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$133,178-
Families$114,817$112,830
Households$75,104$93,830
Non Families$39,313$54,592

$58,790

Average Income

$75,104

Median Household Income

12.48%

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)