St. Mary township

County:: Hancock County
County Seat:: No
Area (mi²):: 36.975
State:: Illinois

St. Mary township is located in Hancock County, Illinois. St. Mary township has a 2025 population of 547. St. Mary township is currently declining at a rate of -0.18% annually and its population has decreased by -2.15% since the most recent census, which recorded a population of 559 in 2020.

The average household income in St. Mary township is $65,608 with a poverty rate of 21.93%. The median age in St. Mary township is 52.8 years: 49.4 years for males, and 55.2 years for females.

Demographics

The racial composition of St. Mary township includes 95.76% White, and smaller percentages for Black or African American, Two or more races, other race, Native American, Asian, Native Hawaiian or Pacific Islander and multiracial populations.

Population by Race

White

Black or African American

Two or more races

Other race

Native American

Asian

Native Hawaiian or Pacific Islander

Race	Population	Percentage (of total)
White	655	95.76%
Black or African American	14	2.05%
Two or more races	12	1.75%
Other race	3	0.44%
Native American	0	0%
Asian	0	0%
Native Hawaiian or Pacific Islander	0	0%

St. Mary township Marital Status

Married

Widowed

Divorced

Separated

Never Married

Economics and Income Statistics

St. Mary township's average per capita income is $40,703. Household income levels show a median of $52,727. The poverty rate stands at 21.93%.

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	$93,600	-
Families	$80,833	$80,299
Households	$52,727	$65,608
Non Families	$24,375	$32,440

$40,703

Average Income

$52,727

Median Household Income

21.93%

Poverty Rate