Marengo township

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

Marengo township is located in McHenry County, Illinois. Marengo township has a 2025 population of 7,321. Marengo township is currently growing at a rate of 0.51% annually and its population has increased by 1.47% since the most recent census, which recorded a population of 7,215 in 2020.

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

Demographics

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

Population by Race

Race	Population	Percentage (of total)
White	6,712	92.78%
Two or more races	365	5.05%
Other race	122	1.69%
Black or African American	35	0.48%

Marengo township Marital Status

Married

Widowed

Divorced

Separated

Never Married

Economics and Income Statistics

Marengo township'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