Champaign County vs St. Clair County

A side-by-side comparison of Champaign County and St. Clair County: population, income, housing, and more.

Champaign County and St. Clair County are counties in Illinois. This page compares them across population, income, housing, education, commuting, and how each has changed since 2019.

St. Clair County has the higher population (254,777 vs 206,098 in Champaign County). St. Clair County has the higher median household income ($70,178 vs $63,091 in Champaign County). Champaign County has the higher median home value ($205,100 vs $168,800 in St. Clair County).

Population, income & housing

	Champaign County	St. Clair County
Population	206,098	254,777
Median age	30.9 yrs	39.5 yrs
Median household income	$63,091	$70,178
Median home value	$205,100	$168,800
Median gross rent	$1,018	$1,032
Housing units	94,351	115,348
Homeownership rate	53.4%	67.8%
Bachelor's degree or higher	46.6%	30.7%
Unemployment rate	4.5%	5.7%

Trends (ACS 5-year, 2019–2023)

	Champaign County	St. Clair County
Population	209,922 → 206,098 (-1.8%)	262,338 → 254,777 (-2.9%)
Median household income	$52,797 → $63,091 (+19.5%)	$55,179 → $70,178 (+27.2%)
Median home value	$162,100 → $205,100 (+26.5%)	$128,000 → $168,800 (+31.9%)
Median gross rent	$882 → $1,018 (+15.4%)	$861 → $1,032 (+19.9%)

Champaign County

Population

209,922206,098

Median household income

$52,797$63,091

Median home value

$162,100$205,100

Median gross rent

$882$1,018

St. Clair County

Population

262,338254,777

Median household income

$55,179$70,178

Median home value

$128,000$168,800

Median gross rent

$861$1,032

Age & race/ethnicity

Age distribution (share)

	Champaign County	St. Clair County
Under 5	5.3%	5.8%
5 to 17	14.0%	17.4%
18 to 24	22.2%	8.1%
25 to 34	13.6%	12.8%
35 to 44	11.6%	13.2%
45 to 54	9.7%	12.1%
55 to 64	9.9%	13.7%
65 to 74	8.2%	10.3%
75 and over	5.4%	6.5%

Race & ethnicity (share)

	Champaign County	St. Clair County
White (non-Hispanic)	63.6%	59.5%
Black or African American	13.1%	27.8%
American Indian & Alaska Native	0.1%	0.2%
Asian	10.7%	1.5%
Native Hawaiian & Pacific Islander	0.0%	0.0%
Some other race	0.4%	0.5%
Two or more races	4.1%	5.5%
Hispanic or Latino	8.1%	4.9%

Educational attainment (age 25+)

Share of adults 25+

	Champaign County	St. Clair County
No high school diploma	4.9%	7.3%
High school graduate	22.3%	27.0%
Some college or associate's	26.2%	35.0%
Bachelor's degree	21.0%	17.6%
Graduate or professional degree	25.5%	13.2%

Commute to work

How workers get to work (share)

	Champaign County	St. Clair County
Drove alone	65.6%	76.9%
Carpooled	7.9%	7.7%
Public transit	3.7%	1.9%
Walked	7.2%	1.5%
Bicycle	1.5%	0.1%
Worked from home	13.2%	10.9%
Other means	1.0%	1.0%

Housing

Units in structure (share)

	Champaign County	St. Clair County
1-unit, detached	51.7%	71.4%
1-unit, attached	5.2%	4.7%
2 to 4 units	6.8%	8.0%
5 to 19 units	17.3%	8.2%
20 or more units	15.7%	3.2%
Mobile home & other	3.4%	4.6%

Poverty & households

	Champaign County	St. Clair County
Poverty rate	18.0%	13.6%
Average household size	2.29	2.47
Mean commute (minutes)	17	25
Median year structure built	1982	1975