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COUNTY · 2010 ACS

St. Clair County

Illinois · 270,056 residents · 657.735 sq mi
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The short version

St. Clair County has roughly average household income, with a median household income of $48,562. Population has held roughly steady since 2000. Median home value has risen by half since 2000, reaching $122,400.

At a glance
Lower income
below the US median
US median: $52,703
Mid-age
median age 36.9
US median: 37.2
Average education
24% hold a bachelor's degree
US average: 28%
Less affordable
home values up 30%, inflation adjusted
US median home: $225,659
Section 01

Population & growth

Total population
270,056
+5%since 2000
from 256,082 in 2000
1990 – 2025
Population density
411 / sq mi
+5%since 2000
from 389 / sq mi in 2000
US average: 261
Median age
36.9
+5%since 2000
from 35.3 in 2000
US average: 37.2
Population, 1990 – 2024
252K257K262K267K272K1990201020202024St. Clair County
2024254K
1990201020202024
Section 02

Income & economy

Median household income
$48,562
−2%inflation adjusted, since 2000
from $39,148 in 2000
US average: $52,703
1990 – 2024
Per capita income
$24,770
+31%since 2000
from $18,932 in 2000
US average: $27,286
Households earning $100K+
30.1%
+1.2 ptssince 2009
from 28.9% in 2009
US average: 33.3%
Poverty rate
15.5%
+1.0 ptssince 2000
from 14.5% in 2000
US average: 13.8%
Income inequality (Gini)
0.442
US average: 0.461
Workforce by industry, 2010
Information11.4%
US avg: 11.5%
Retail trade8.5%
US avg: 10.9%
Other services7.2%
US avg: 7%
Finance & insurance6.7%
US avg: 5.1%
Professional, scientific, technical5.6%
US avg: 4.2%
Public administration5.4%
US avg: 4.9%
Wholesale trade5.3%
US avg: 7.2%
Transportation & warehousing2.3%
US avg: 3.1%
Arts, entertainment, food2%
US avg: 2.4%
Education & health services1.1%
US avg: 0.9%
Agriculture, forestry, fishing1%
US avg: 1.9%
Construction0.8%
US avg: 1.4%
Manufacturing0.2%
US avg: 0.5%
BARS: THIS PLACE · TICKS: US AVERAGE
Section 03

Housing

Median home value
$122,400
+30%inflation adjusted, since 2000
from $74,200 in 2000
US average: $225,659
1990 – 2024
Median gross rent
$734
+15%inflation adjusted, since 2000
from $503 in 2000
US average: $853
Owner-occupied
46.1%
−20.9 ptssince 2000
from 67.0% in 2000
33.7% rent
Vacancy rate
10.4%
+0.1 ptssince 2009
from 10.3% in 2009
US average: 12.1%
Owner cost-burdened
25.9%
+0.2 ptssince 2009
from 25.7% in 2009
US average: 30.9%
Renter cost-burdened
45.5%
+1.3 ptssince 2009
from 44.2% in 2009
US average: 46.8%
Afford Score
2.5
+33%since 2000
from 1.9 in 2000
1990 – 2024
RELATED:See current rent listings in St. Clair County on RentDataNow
Section 04

Race & ethnicity

2000
White, non-Hispanic66.8%(171,151)
Black28.6%(73,282)
Hispanic / Latino2.2%(5,604)
Asian0.9%(2,257)
Other0%
Diversity Score56.9%(145,602)
2010
White, non-Hispanic62.9%(169,858)
Black30.3%(81,860)
Hispanic / Latino3.3%(8,785)
Asian1.2%(3,213)
Other2.2%(5,976)
Diversity Score63.7%(171,991)
Diversity Score
64
+12%since 2000
from 57 in 2000
1990 – 2024
Section 05

Education

Bachelor's degree or higher
23.9%
+4.6 ptssince 2000
from 19.3% in 2000
US average: 27.9%
High school or higher
87.4%
+6.5 ptssince 2000
from 80.9% in 2000
US average: 84.9%
Graduate degree
8.8%
+1.6 ptssince 2000
from 7.2% in 2000
US average: 10.2%
Section 06

Commute & transportation

Average commute
23.2 min
+39%since 2000
from 16.6 min in 2000
US average: 25.2
Drive alone to work
81.3%
−0.2 ptssince 2009
from 81.6% in 2009
US average: 76.2%
Carpooled to work
8.7%
Unchangedsince 2009
from 8.6% in 2009
US average: 10.4%
Public transit
4.4%
+0.2 ptssince 2009
from 4.2% in 2009
US average: 4.7%
Worked from home
2.9%
+0.1 ptssince 2009
from 2.8% in 2009
US average: 4.1%
Walked to work
1.4%
Unchangedsince 2009
from 1.5% in 2009
US average: 2.8%
Biked to work
0.3%
Unchangedsince 2009
from 0.3% in 2009
US average: 0.5%
No vehicle available
8.4%
−0.2 ptssince 2009
from 8.6% in 2009
US average: 8.7%
Section 07

Work & employment

Self-employed
11.7%
+0.7 ptssince 2009
from 11.0% in 2009
US average: 12.9%
Management & professional
33.2%
−32.6 ptssince 2009
from 65.8% in 2009
US average: 35.2%
Section 08

People & community

Male
48.1%
+0.3 ptssince 2009
from 47.8% in 2009
Female
51.9%
−0.3 ptssince 2009
from 52.2% in 2009
Foreign born
2.4%
Unchangedsince 2009
from 2.4% in 2009
US average: 12.8%
Veterans
15.5%
−30.6 ptssince 2009
from 46.0% in 2009
US average: 9.9%
Drill deeper

Places similar to St. Clair County

Kalamazoo County
Pop 263,795
Madison County
Pop 263,110
Yavapai County
Pop 252,552
Canyon County
Pop 275,123
Places similar to St. Clair County
Head to head

Compare St. Clair County to nearby counties

ST. CLAIR COUNTY VS
Monroe County
Income$102,880+112%
Home value$282,100+130%
Population34,840−86%
SEE FULL COMPARISON →
ST. CLAIR COUNTY VS
St. Louis
Income$56,160+16%
Home value$197,500+61%
Population278,144+11%
SEE FULL COMPARISON →
ST. CLAIR COUNTY VS
Madison County
Income$75,793+56%
Home value$173,000+41%
Population263,110+5%
SEE FULL COMPARISON →
ST. CLAIR COUNTY VS
Clinton County
Income$86,588+78%
Home value$192,400+57%
Population37,128−85%
SEE FULL COMPARISON →
Frequently asked

How many people live in St. Clair County, Illinois?

St. Clair County, Illinois has about 270,056 residents according to the 2010 American Community Survey.

What is the median household income in St. Clair County, Illinois?

The typical household in St. Clair County, Illinois earns about $48,562 a year. Half of households make more than that, and half make less.

Is St. Clair County, Illinois expensive?

In St. Clair County, Illinois, the median home is worth about $122,400, and the typical rent is about $734 a month.

How educated are people in St. Clair County, Illinois?

About 23.9% of adults age 25 and over in St. Clair County, Illinois hold a bachelor's degree or higher.

What is the poverty rate in St. Clair County, Illinois?

About 15.5% of people in St. Clair County, Illinois live below the federal poverty line.

Has St. Clair County, Illinois grown since 1990?

Yes, St. Clair County, Illinois has grown since 1990. The population has added about 7,204 residents, a change of about 3 percent over that period.

Keep going

Explore from here

68 census tracts (top 20 by population)
Census Tract 5034.04Census Tract 5033.23Census Tract 5033.22Census Tract 5039.08Census Tract 5043.54Census Tract 5033.04Census Tract 5032.03Census Tract 5033.34Census Tract 5033.24Census Tract 5034.14Census Tract 5034.13Census Tract 5034.12Census Tract 5023Census Tract 5040.01Census Tract 5039.06Census Tract 5032.02Census Tract 5043.55Census Tract 5033.32Census Tract 5040.02Census Tract 5026.02
27 ZIP codes
ZIP 62269ZIP 62221ZIP 62226ZIP 62220ZIP 62208ZIP 62223ZIP 62206ZIP 62258ZIP 62232ZIP 62207ZIP 62254ZIP 62260ZIP 62205ZIP 62243ZIP 62203ZIP 62225ZIP 62201ZIP 62285ZIP 62239ZIP 62204ZIP 62264ZIP 62257ZIP 62240ZIP 62255ZIP 62059ZIP 62282ZIP 62289
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DATA: US CENSUS BUREAU ACS 5-YEAR + DECENNIAL CENSUS · UPDATED 2024

How we source and harmonize this data →

St. Clair County, Illinois (2010): demographics, income & housing data · CensusEasy