Colchester township Flag

Colchester township

County Seat:
No
Area (mi²):
18.057
State:
Illinois

Colchester township is located in McDonough County, Illinois. Colchester township has a 2026 population of 1,490. Colchester township is currently declining at a rate of -1.26% annually and its population has decreased by -4.49% since the most recent census, which recorded a population of 1,560 in 2020.

The median household income in Colchester township is $63,983 with a poverty rate of 9.94%. The median age in Colchester township is 46 years: 42.8 years for males, and 48 years for females. For every 100 females there are 103.0 males.

1.5K
Total Population
83
Density (mi²)
-19 -1.26%
Growth

Colchester township Population

Colchester township Population

Data after 2023 is projected based on recent change

Year ↓
Population
Growth
Annual Change
20261,490-19-1.26%
20251,509-19-1.24%
20241,528-19-1.23%
20231,547-3-0.19%
20221,55020.13%
20211,548-12-0.77%
20201,560-8-0.51%
20191,704-17-0.99%
20181,721-19-1.09%
20171,740-34-1.92%
20161,774-17-0.95%
20151,791-11-0.61%
20141,802-20-1.1%
20131,822-12-0.65%
20121,83430.16%
20111,831-6-0.33%
20101,83610.05%

Median Age

Overall: 46 years
Female: 48 years
Male: 42.8 years

Colchester township Adults

There are 1,274 adults, (465 of whom are seniors) in Colchester township.

Sex Ratio

Female: 793 (49.3%)
Male: 817 (50.7%)

Demographics

The racial composition of Colchester township includes 98.01% White, and smaller percentages for Two or more races and multiracial populations.

Population by Race

Race
Population ↓
Percentage (of total)
White1,57898.01%
Two or more races321.99%
Race
Population ↓
Percentage (of total)
White321.99%
Two or more races30.19%
Race
Population ↓
Percentage (of total)
White1,54696.02%
Two or more races291.8%

Colchester township Marital Status

Economics and Income Statistics

Colchester township 's average per capita income is $40,098. Household income levels show a median of $63,983. The poverty rate stands at 9.94%.

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
Families$70,793$78,398
Married Families$70,793-
Households$63,983$69,201
Non Families$22,768$40,981

$40,098

Average Income

$63,983

Median Household Income

9.94%

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)