Erin township Flag

Erin township

County Seat:
No
Area (mi²):
18.148
State:
Illinois

Erin township is located in Stephenson County, Illinois. Erin township has a 2026 population of 366. Erin township is currently declining at a rate of -0.54% annually and its population has decreased by -4.19% since the most recent census, which recorded a population of 382 in 2020.

The median household income in Erin township is $84,688 with a poverty rate of 43.74%. The median age in Erin township is 18.9 years: 39.7 years for males, and 17.5 years for females. For every 100 females there are 77.0 males.

366
Total Population
20
Density (mi²)
-2 -0.54%
Growth

Erin township Population

Erin township Population

Data after 2023 is projected based on recent change

Year ↓
Population
Growth
Annual Change
2026366-2-0.54%
2025368-2-0.54%
2024370-2-0.54%
2023372-3-0.8%
2022375-3-0.79%
2021378-4-1.05%
2020382-1-0.26%
2019386-3-0.77%
2018389-2-0.51%
2017391-4-1.01%
2016395-1-0.25%
2015396-5-1.25%
2014401-3-0.74%
201340400%
2012404-5-1.22%
2011409-1-0.24%
2010409-1-0.24%

Median Age

Overall: 18.9 years
Female: 17.5 years
Male: 39.7 years

Erin township Adults

There are 239 adults, (21 of whom are seniors) in Erin township.

Sex Ratio

Female: 239 (56.5%)
Male: 184 (43.5%)

Demographics

The racial composition of Erin township includes 91.73% White, 6.86% Black or African American, and smaller percentages for Two or more races and multiracial populations.

Population by Race

Race
Population ↓
Percentage (of total)
White38891.73%
Black or African American296.86%
Two or more races61.42%
Race
Population ↓
Percentage (of total)
White38891.73%
Black or African American296.86%
Two or more races61.42%

Erin township Marital Status

Economics and Income Statistics

Erin township 's average per capita income is $41,181. Household income levels show a median of $84,688. The poverty rate stands at 43.74%.

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
Non Families$145,938$122,626
Households$84,688$90,055
Married Families$83,516-
Families$83,047$79,709

$41,181

Average Income

$84,688

Median Household Income

43.74%

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)