Colchester

County:: McDonough County
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.

Demographics

The racial composition of Colchester includes 98.68% White, and smaller percentages for Two or more races, Black or African American, Native American, Asian, Native Hawaiian or Pacific Islander, other race and multiracial populations.

Population by Race

White

Two or more races

Black or African American

Native American

Asian

Native Hawaiian or Pacific Islander

Other race

Race	Population	Percentage (of total)
White	1,043	98.68%
Two or more races	14	1.32%
Black or African American	0	0%
Native American	0	0%
Asian	0	0%
Native Hawaiian or Pacific Islander	0	0%
Other race	0	0%

Colchester Marital Status

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