Marion is a city located in Williamson County, Illinois. Marion has a 2025 population of 16,860. It is also the county seat of Williamson County. Marion is currently growing at a rate of 0.02% annually and its population has increased by 0.12% since the most recent census, which recorded a population of 16,840 in 2020.
The average household income in Marion is $78,411 with a poverty rate of 15.97%.The median age in Marion is 40.4 years: 39.5 years for males, and 41.3 years for females.
Data after 2023 is projected based on recent change
The racial composition of Marion includes 86.22% White, 5.23% Black or African American, 3.14% Asian, and smaller percentages for other race, Native American and multiracial populations.
Race | Population | Percentage (of total) |
---|---|---|
White | 14,482 | 86.22% |
Black or African American | 879 | 5.23% |
Two or more races | 846 | 5.04% |
Asian | 527 | 3.14% |
Other race | 33 | 0.2% |
Native American | 29 | 0.17% |
Married
Widowed
Divorced
Separated
Never Married
Marion's average per capita income is $47,616. Household income levels show a median of $57,281. The poverty rate stands at 15.97%.
Name | Median | Mean |
---|---|---|
Married Families | $106,392 | - |
Families | $78,851 | $100,593 |
Households | $57,281 | $78,411 |
Non Families | $33,900 | $50,209 |
Average Income
Median Household Income
Poverty Rate