Swansea

County:: St. Clair County
County Seat:: No
Area (mi²):: 6.477
State:: Illinois

Swansea is a village located in St. Clair County, Illinois. Swansea has a 2025 population of 14,552. Swansea is currently growing at a rate of 0.28% annually and its population has increased by 1.4% since the most recent census, which recorded a population of 14,351 in 2020.

The average household income in Swansea is $113,284 with a poverty rate of 8.34%. The median age in Swansea is 38.4 years: 37.4 years for males, and 40.7 years for females.

Demographics

The racial composition of Swansea includes 72.47% White, 17.7% Black or African American, and smaller percentages for Asian, Native American, Native Hawaiian or Pacific Islander, other race and multiracial populations.

Population by Race

White

Black or African American

Two or more races

Asian

Native American

Native Hawaiian or Pacific Islander

Other race

Race	Population	Percentage (of total)
White	10,583	72.47%
Black or African American	2,585	17.7%
Two or more races	1,089	7.46%
Asian	346	2.37%
Native American	0	0%
Native Hawaiian or Pacific Islander	0	0%
Other race	0	0%

Swansea Marital Status

Married

Widowed

Divorced

Separated

Never Married

Economics and Income Statistics

Swansea's average per capita income is $53,285. Household income levels show a median of $84,367. The poverty rate stands at 8.34%.

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	$122,070	-
Families	$106,907	$140,859
Households	$84,367	$113,284
Non Families	$47,500	$57,194

$53,285

Average Income

$84,367

Median Household Income

8.34%

Poverty Rate