Seneca township Flag

Seneca township

County:
LaSalle County
County Seat:
No
Area (mi²):
35.868
State:
Illinois

Seneca township is located in LaSalle County, Illinois. Seneca township has a 2026 population of 2,882. Seneca township is currently growing at a rate of 0.21% annually but its population has decreased by -0.1% since the most recent census, which recorded a population of 2,885 in 2020.

The median household income in Seneca township is $134,795 with a poverty rate of 0.45%. The median age in Seneca township is 37 years: 39.1 years for males, and 35.8 years for females. For every 100 females there are 95.7 males.

2.9K
Total Population
80
Density (mi²)
6 0.21%
Growth

Seneca township Population

Seneca township Population

Data after 2023 is projected based on recent change

Demographics

The racial composition of Seneca township includes 87.83% White, 3.4% other race, and smaller percentages for Black or African American and multiracial populations.

Population by Race

White (87.83%)

Two or more races (8.56%)

Other race (3.4%)

Black or African American (0.21%)

Race
Population
Percentage (of total)
White2,53387.83%
Two or more races2478.56%
Other race983.4%
Black or African American60.21%

Seneca township Marital Status

OverallMalesFemales0%10%20%30%40%50%60%70%80%90%100%

Married

Widowed

Divorced

Separated

Never Married

Economics and Income Statistics

Seneca township's average per capita income is $66,591. Household income levels show a median of $134,795. The poverty rate stands at 0.45%.

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$166,569-
Families$165,074$174,539
Households$134,795$163,181
Non Families-$92,638

$66,591

Average Income

$134,795

Median Household Income

0.45%

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)