Swan township Flag

Swan township

County:
Warren County
County Seat:
No
Area (mi²):
35.311
State:
Illinois

Swan township is located in Warren County, Illinois. Swan township has a 2026 population of 227. Swan township is currently declining at a rate of -0.87% annually and its population has decreased by -5.81% since the most recent census, which recorded a population of 241 in 2020.

The median age in Swan township is 39.4 years: 39.5 years for males, and 39.3 years for females. For every 100 females there are 265.1 males.

227
Total Population
6.4
Density (mi²)
-2 -0.87%
Growth

Swan township Population

Swan township Population

Data after 2023 is projected based on recent change

Year ↓
Population
Growth
Annual Change
2026227-2-0.87%
2025229-2-0.87%
2024231-2-0.86%
2023233-2-0.85%
2022235-3-1.26%
2021238-3-1.24%
202024100%
2019255-3-1.16%
2018258-2-0.77%
2017260-2-0.76%
2016262-2-0.76%
2015264-4-1.49%
201426810.37%
201326720.75%
2012265-1-0.38%
201126610.38%
201026500%

Median Age

Overall: 39.4 years
Female: 39.3 years
Male: 39.5 years

Swan township Adults

There are 123 adults, (56 of whom are seniors) in Swan township.

Sex Ratio

Female: 43 (27.4%)
Male: 114 (72.6%)

Demographics

The racial composition of Swan township includes 99.36% White, and smaller percentages for Two or more races and multiracial populations.

Population by Race

Race
Population ↓
Percentage (of total)
White15699.36%
Two or more races10.64%
Race
Population ↓
Percentage (of total)
White15699.36%
Two or more races10.64%

Swan township Marital Status

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)