Colchester Flag

Colchester

County Seat:
No
Area (mi²):
1.15
State:
Illinois

Colchester is a city located in McDonough County, Illinois. Colchester has a 2025 population of 1,080. Colchester is currently declining at a rate of -0.46% annually and its population has decreased by -2.17% since the most recent census, which recorded a population of 1,104 in 2020.

The average household income in Colchester is $70,550 with a poverty rate of 9.74%.The median age in Colchester is 40.6 years: 36.9 years for males, and 45.1 years for females.

1.1K
Total Population
939
Density (mi²)
-5 -0.46%
Growth

Colchester Population

Colchester Population

Data after 2023 is projected based on recent change

Demographics

The racial composition of Colchester includes 98.68% White, and smaller percentages for Two or more races and multiracial populations.

Population by Race

Race
Population
Percentage (of total)
White1,04398.68%
Two or more races141.32%

Colchester Marital Status

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

Married

Widowed

Divorced

Separated

Never Married

Economics and Income Statistics

Colchester's average per capita income is $40,303. Household income levels show a median of $62,500. The poverty rate stands at 9.74%.

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
Married Families$73,333-
Families$72,639$77,668
Households$62,500$70,550
Non Families$22,470$48,504

$40,303

Average Income

$62,500

Median Household Income

9.74%

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)