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 and multiracial populations.

Population by Race

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%

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