Swansea Flag

Swansea

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.

14.6K
Total Population
2,247
Density (mi²)
40 0.28%
Growth

Swansea Population

Demographics

Economics and Income Statistics

Sources

  1. US Census State Population Estimates - Most recent state estimates from the Census Bureau's Population Estimates Program
  2. US Census County Population Estimates - Most recent county estimates from the Census Bureau's Population Estimates Program
  3. American Community Survey (2009 - 2013)
  4. Census QuickFacts
  5. Historical Populations of States and Counties (1790 - 1990)