St. Mary township Flag

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 2026 population of 533. St. Mary township is currently declining at a rate of -0.93% annually and its population has decreased by -4.82% since the most recent census, which recorded a population of 560 in 2020.

The median household income in St. Mary township is $56,429 with a poverty rate of 16.87%. The median age in St. Mary township is 54.4 years: 50 years for males, and 59.6 years for females. For every 100 females there are 130.7 males.

533
Total Population
14
Density (mi²)
-5 -0.93%
Growth

St. Mary township Population

St. Mary township Population

Data after 2023 is projected based on recent change

Year ↓
Population
Growth
Annual Change
2026533-5-0.93%
2025538-5-0.92%
2024543-5-0.91%
2023548-4-0.72%
2022552-3-0.54%
2021555-5-0.89%
2020560-2-0.36%
2019594-4-0.67%
2018598-5-0.83%
2017603-8-1.31%
201661100%
2015611-4-0.65%
2014615-7-1.13%
2013622-9-1.43%
2012631-5-0.79%
2011636-4-0.62%
2010639-1-0.16%

Median Age

Overall: 54.4 years
Female: 59.6 years
Male: 50 years

St. Mary township Adults

There are 545 adults, (225 of whom are seniors) in St. Mary township.

Sex Ratio

Female: 280 (43.3%)
Male: 366 (56.7%)

Demographics

The racial composition of St. Mary township includes 95.2% White, and smaller percentages for other race, Black or African American, Two or more races and multiracial populations.

Population by Race

Race
Population ↓
Percentage (of total)
White61595.2%
Other race111.7%
Black or African American101.55%
Two or more races101.55%
Race
Population ↓
Percentage (of total)
Other race111.7%
Two or more races81.24%
White10.15%
Race
Population ↓
Percentage (of total)
White61495.05%
Black or African American101.55%
Two or more races20.31%

St. Mary township Marital Status

Economics and Income Statistics

St. Mary township 's average per capita income is $36,250. Household income levels show a median of $56,429. The poverty rate stands at 16.87%.

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$95,962-
Families$86,250$86,038
Households$56,429$71,066
Non Families$33,214$41,076

$36,250

Average Income

$56,429

Median Household Income

16.87%

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)