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 2,894. Seneca township is currently growing at a rate of 0.21% annually and its population has increased by 0.31% since the most recent census, which recorded a population of 2,885 in 2020.

The median household income in Seneca township is $133,558 with a poverty rate of 4.63%. The median age in Seneca township is 44.7 years: 39.1 years for males, and 50.5 years for females. For every 100 females there are 101.5 males.

2.9K
Total Population
81
Density (mi²)
6 0.21%
Growth

Seneca township Population

Seneca township Population

Data after 2023 is projected based on recent change

Year ↓
Population
Growth
Annual Change
20262,89460.21%
20252,88860.21%
20242,88260.21%
20232,87620.07%
20222,874-22-0.76%
20212,896110.38%
20202,885-5-0.17%
20192,868-12-0.42%
20182,88000%
20172,88030.1%
20162,877-14-0.48%
20152,891-5-0.17%
20142,896-6-0.21%
20132,902-15-0.51%
20122,917-5-0.17%
20112,922-22-0.75%
20102,92610.03%

Median Age

Overall: 44.7 years
Female: 50.5 years
Male: 39.1 years

Seneca township Adults

There are 2,214 adults, (589 of whom are seniors) in Seneca township.

Sex Ratio

Female: 1,430 (49.6%)
Male: 1,451 (50.4%)

Demographics

The racial composition of Seneca township includes 79% White, 6.42% other race, 3.85% Asian, and smaller percentages for Black or African American and multiracial populations.

Population by Race

Race
Population ↓
Percentage (of total)
White2,27679%
Two or more races29410.2%
Other race1856.42%
Asian1113.85%
Black or African American150.52%
Race
Population ↓
Percentage (of total)
Two or more races28810%
Other race1856.42%
Asian551.91%
White170.59%
Race
Population ↓
Percentage (of total)
White2,25978.41%
Asian561.94%
Black or African American150.52%
Two or more races60.21%

Seneca township Marital Status

Economics and Income Statistics

Seneca township 's average per capita income is $64,450. Household income levels show a median of $133,558. The poverty rate stands at 4.63%.

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$160,250-
Families$155,686$180,136
Households$133,558$150,322
Non Families-$48,878

$64,450

Average Income

$133,558

Median Household Income

4.63%

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)