Chatham

County:: Sangamon County
County Seat:: No
Area (mi²):: 7.406
State:: Illinois

Chatham is a village located in Sangamon County, Illinois. Chatham has a 2025 population of 14,597. Chatham is currently growing at a rate of 0.25% annually and its population has increased by 1.26% since the most recent census, which recorded a population of 14,416 in 2020.

The average household income in Chatham is $121,600 with a poverty rate of 3.68%. The median age in Chatham is 35.1 years: 37.7 years for males, and 31.8 years for females.

Demographics

The racial composition of Chatham includes 90.23% White, and smaller percentages for Asian, Black or African American, other race, Native Hawaiian or Pacific Islander, Native American and multiracial populations.

Population by Race

White

Two or more races

Asian

Black or African American

Other race

Native Hawaiian or Pacific Islander

Native American

Race	Population	Percentage (of total)
White	13,300	90.23%
Two or more races	584	3.96%
Asian	374	2.54%
Black or African American	334	2.27%
Other race	133	0.9%
Native Hawaiian or Pacific Islander	15	0.1%
Native American	0	0%

Chatham Marital Status

Married

Widowed

Divorced

Separated

Never Married

Economics and Income Statistics

Chatham's average per capita income is $67,687. Household income levels show a median of $106,030. The poverty rate stands at 3.68%.

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	$140,744	-
Families	$132,575	$150,793
Households	$106,030	$121,600
Non Families	$59,067	$63,562

$67,687

Average Income

$106,030

Median Household Income

3.68%

Poverty Rate