Johnston City

County:: Williamson County
County Seat:: No
Area (mi²):: 2.116
State:: Illinois

Johnston City is a city located in Williamson County, Illinois. Johnston City has a 2025 population of 3,260. Johnston City is currently declining at a rate of -0.73% annually and its population has decreased by -3.52% since the most recent census, which recorded a population of 3,379 in 2020.

The average household income in Johnston City is $70,474 with a poverty rate of 14.8%. The median age in Johnston City is 44.1 years: 34.5 years for males, and 52.1 years for females.

Demographics

The racial composition of Johnston City includes 91.61% White, 3.55% Asian, and smaller percentages for other race, Black or African American, Native American, Native Hawaiian or Pacific Islander and multiracial populations.

Population by Race

White

Asian

Two or more races

Other race

Black or African American

Native American

Native Hawaiian or Pacific Islander

Race	Population	Percentage (of total)
White	3,070	91.61%
Asian	119	3.55%
Two or more races	105	3.13%
Other race	57	1.7%
Black or African American	0	0%
Native American	0	0%
Native Hawaiian or Pacific Islander	0	0%

Johnston City Marital Status

Married

Widowed

Divorced

Separated

Never Married

Economics and Income Statistics

Johnston City's average per capita income is $51,838. Household income levels show a median of $46,629. The poverty rate stands at 14.8%.

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	$105,679	-
Families	$93,295	$91,968
Households	$46,629	$70,474
Non Families	$28,288	$38,057

$51,838

Average Income

$46,629

Median Household Income

14.8%

Poverty Rate