CensusEasy
COUNTY · 2000 CENSUS

St. Clair County

Illinois · 256,082 residents · 657.735 sq mi
Time machine
COMPARE TO
Part of the St. Louis metro area
Compare
The short version

St. Clair County has roughly average household income, with a median household income of $39,148. Population has held roughly steady since 1990. Median home value is $74,200.

At a glance
Lower income
below the US median
US median: $42,589
Mid-age
median age 35.3
US median: 35.2
Less educated
19% hold a bachelor's degree
US average: 24%
Stable housing
home values roughly flat, inflation adjusted
US median home: $120,530
Section 01

Population & growth

Total population
256,082
−3%since 1990
from 262,852 in 1990
1990 – 2025
Population density
389 / sq mi
−3%since 1990
from 400 / sq mi in 1990
US average: 242
Median age
35.3
+10%since 1990
from 32.2 in 1990
US average: 35.2
Population, 1990 – 2024
252K257K262K267K272K1990201020202024St. Clair County
2024254K
1990201020202024
Section 02

Income & economy

Median household income
$39,148
+11%inflation adjusted, since 1990
from $26,813 in 1990
US average: $42,589
1990 – 2024
Per capita income
$18,932
+59%since 1990
from $11,916 in 1990
US average: $21,522
Poverty rate
14.5%
−2.9 ptssince 1990
from 17.4% in 1990
US average: 12.4%
Section 03

Housing

Median home value
$74,200
+3%inflation adjusted, since 1990
from $54,900 in 1990
US average: $120,530
1990 – 2024
Median gross rent
$503
−4%inflation adjusted, since 1990
from $399 in 1990
US average: $602
Owner-occupied
67.0%
+2.3 ptssince 1990
from 64.7% in 1990
33.0% rent
Afford Score
1.9
−7%since 1990
from 2.0 in 1990
1990 – 2024
RELATED:See current rent listings in St. Clair County on RentDataNow
Section 04

Race & ethnicity

1990
White, non-Hispanic71.5%(188,032)
Black27.2%(71,409)
Hispanic / Latino1.4%(3,741)
Asian0.6%(1,682)
Diversity Score53.8%(141,449)
2000
White, non-Hispanic66.8%(171,151)
Black28.6%(73,282)
Hispanic / Latino2.2%(5,604)
Asian0.9%(2,257)
Diversity Score56.9%(145,602)
Diversity Score
57
+6%since 1990
from 54 in 1990
1990 – 2024
Section 05

Education

Bachelor's degree or higher
19.3%
+4.6 ptssince 1990
from 14.7% in 1990
US average: 24.4%
High school or higher
80.9%
+8.3 ptssince 1990
from 72.6% in 1990
US average: 80.3%
Graduate degree
7.2%
+1.8 ptssince 1990
from 5.4% in 1990
US average: 8.8%
Section 06

Commute & transportation

Average commute
16.6 min
−20%since 1990
from 20.8 min in 1990
US average: 17.6
Section 07

Work & employment

No data for the years selected.

Section 08

People & community

No data for the years selected.

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+163%
Home value$282,100+280%
Population34,840−86%
SEE FULL COMPARISON →
ST. CLAIR COUNTY VS
St. Louis
Income$56,160+43%
Home value$197,500+166%
Population278,144+11%
SEE FULL COMPARISON →
ST. CLAIR COUNTY VS
Madison County
Income$75,793+94%
Home value$173,000+133%
Population263,110+5%
SEE FULL COMPARISON →
ST. CLAIR COUNTY VS
Clinton County
Income$86,588+121%
Home value$192,400+159%
Population37,128−85%
SEE FULL COMPARISON →
Frequently asked

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

St. Clair County, Illinois has about 256,082 residents according to the 2000 Census.

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

The typical household in St. Clair County, Illinois earns about $39,148 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 $74,200, and the typical rent is about $503 a month.

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

About 19.3% 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 14.5% 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 shrunk since 1990. The population has lost about 6,770 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
Up the hierarchy
All counties in Illinois
Rankings
Highest income countiesLowest poverty counties

DATA: US CENSUS BUREAU ACS 5-YEAR + DECENNIAL CENSUS · UPDATED 2024

How we source and harmonize this data →