Saint Clair County, IL ZIP Codes
Illinois (IL) · 30 ZIP codes · 20 cities
30
ZIP codes
254,796
population (2021)
-5.7%
pop change since 2010
17163
FIPS code
Saint Clair County ZIP code map
About Saint Clair County
Saint Clair County is located in Illinois and contains 30 ZIP codes across 20 cities and communities.
The county's population was 254,796 as of 2021,
a decrease of
5.7% from 270,056 in 2010.
The timezone is Mountain Time (observes DST).
The Federal Information Processing System (FIPS) code for Saint Clair County is 17163.
| Population | |
|---|---|
| 2021 population | 254,796 |
| 2010 population | 270,056 |
| Change | -5.7% |
| County details | |
|---|---|
| State | Illinois |
| FIPS code | 17163 |
| Timezone | Mountain |
| Daylight saving | Yes |
Cities in Saint Clair County
Belleville
Caseyville
Dupo
East Carondelet
East Saint Louis
Fairview Heights
Freeburg
Lebanon
Lenzburg
Lovejoy
Marissa
Mascoutah
Millstadt
National Stock Yards
New Athens
O Fallon
Saint Libory
Scott Air Force Base
Smithton
Summerfield
ZIP codes for Saint Clair County, IL (30)
Demographics & statistics
248,891
Population
39.5
Median age
$71,079
Median household income
$36,080
Per capita income
$130,346
Median home value
$971
Median monthly rent
66.7%
Home ownership
15.2%
Poverty rate
7.0%
Unemployment
80,053
Housing units
24.7%
Bachelor's or higher
Age distribution
Male
Female
7,281
Under 5
7,602
7,248
5–9
7,567
8,886
10–14
9,277
8,013
15–19
8,366
7,420
20–24
7,746
15,574
25–34
16,259
15,872
35–44
16,571
14,829
45–54
15,482
8,193
55–59
8,553
8,446
60–64
8,818
12,046
65–74
12,576
5,486
75–84
5,728
2,472
85+
2,580
← Male
Female →
Age summary
| Group | Count | % |
|---|---|---|
| Under 18 | 58,114 | 23.1% |
| 18 and over | 190,777 | 76.9% |
| 65 and over | 40,888 | 16.9% |
| Median age | 39.5 years | |
Race & ethnicity
White
59.4%
Black or African American
28%
Two or more races
6.2%
Hispanic or Latino
3.1%
Asian
1.5%
Other race
1.4%
American Indian / Alaska Native
0.4%
| Group | Count | % |
|---|---|---|
| White | 152,623 | 59.4% |
| Black or African American | 71,862 | 28% |
| Two or more races | 15,876 | 6.2% |
| Hispanic or Latino | 7,838 | 3.1% |
| Asian | 3,891 | 1.5% |
| Other race | 3,665 | 1.4% |
| American Indian / Alaska Native | 902 | 0.4% |
Household income
Under $10k
6.3%
$10k–$15k
4.8%
$15k–$25k
8.8%
$25k–$35k
7.8%
$35k–$50k
12.4%
$50k–$75k
15.8%
$75k–$100k
14.7%
$100k–$150k
15.5%
$150k–$200k
7.9%
$200k+
6.1%
| Range | % of households |
|---|---|
| Under $10k | 6.3% |
| $10k–$15k | 4.8% |
| $15k–$25k | 8.8% |
| $25k–$35k | 7.8% |
| $35k–$50k | 12.4% |
| $50k–$75k | 15.8% |
| $75k–$100k | 14.7% |
| $100k–$150k | 15.5% |
| $150k–$200k | 7.9% |
| $200k+ | 6.1% |
| Median income | $71,079 |
Housing
Home values
Under $50k
17.4%
$50k–$100k
23.3%
$100k–$150k
14.5%
$150k–$200k
13.5%
$200k–$300k
19.2%
$300k–$500k
9.9%
$500k–$1M
2.0%
$1M+
0.2%
Housing overview
| Metric | Value |
|---|---|
| Median home value | $130,346 |
| Median rent / month | $971 |
| Owner occupied | 66.7% |
| Renter occupied | 33.3% |
| Vacant | 13.3% |
| Single-family detached | 71.8% |
| Large apartment buildings | 2.7% |
| Mobile homes | 6.4% |
| Median rooms | 5.8 |
| Avg household size (owned) | 2.65 |
Year built
| Era | % |
|---|---|
| 2020 or later | 0.2% |
| 2010–2019 | 6.7% |
| 2000–2009 | 13.3% |
| 1990–1999 | 12.2% |
| 1980–1989 | 9.8% |
| 1970–1979 | 10.3% |
| 1960–1969 | 11.1% |
| 1950–1959 | 14.6% |
| 1940–1949 | 5.5% |
| 1939 or earlier | 16.3% |
Bedrooms
| Size | % of units |
|---|---|
| No bedroom (studio) | 1.3% |
| 1 bedroom | 8.3% |
| 2 bedrooms | 26.7% |
| 3 bedrooms | 42.6% |
| 4 bedrooms | 16.8% |
| 5+ bedrooms | 4.2% |
Vehicles per household
| Vehicles | % of households |
|---|---|
| No vehicle | 8.2% |
| 1 vehicle | 34.0% |
| 2 vehicles | 35.8% |
| 3 or more | 22.0% |
Heating fuel
| Fuel type | % |
|---|---|
| Utility gas | 60.4% |
| Electricity | 30.1% |
| Propane / LP gas | 7.8% |
| Fuel oil | 0.3% |
| Wood | 0.7% |
| No fuel used | 0.3% |
Households & families
| Household type | Count | % |
|---|---|---|
| Married-couple family | 43,403 | 43.8% |
| Cohabiting couple | 5,759 | 6.1% |
| Male householder, no spouse | 18,218 | 17.9% |
| Female householder, no spouse | 30,233 | 32.1% |
| Households with children under 18 | 29,514 | 30.8% |
| Households with seniors (65+) | 29,253 | 30.6% |
| Average household size | 2.57 | |
Marital status
| Status | Male | Female |
|---|---|---|
| Never married | 37.2% | 33.2% |
| Married | 45.8% | 42.3% |
| Separated | 2.7% | 2.1% |
| Widowed | 2.9% | 9.7% |
| Divorced | 11.4% | 12.8% |
Education
Less than 9th grade
2.8%
Some HS, no diploma
6.5%
HS graduate
30.5%
Some college, no degree
24.7%
Associate's degree
10.8%
Bachelor's degree
14.6%
Graduate / professional
10.0%
| Metric | % |
|---|---|
| HS diploma or higher | 90.7% |
| Bachelor's or higher | 24.7% |
School enrollment (ages 3–17)
| Type | Count | % |
|---|---|---|
| Nursery / preschool | 4,344 | 7.8% |
| Kindergarten | 3,015 | 4.3% |
| Elementary school | 27,011 | 41.7% |
| High school | 13,855 | 24.3% |
| College / grad school | 15,484 | 21.9% |
Employment
Industry of employment
Education & healthcare
20.9%
Professional & management
12.0%
Arts, food & hospitality
10.9%
Retail trade
10.6%
Manufacturing
9.4%
Transportation & utilities
7.9%
Finance & real estate
6.1%
Construction
5.6%
Public administration
5.6%
Other services
4.8%
Wholesale trade
2.6%
Information
2.0%
Agriculture & mining
1.6%
Occupation
| Category | % |
|---|---|
| Management, business & arts | 32.8% |
| Service | 20.7% |
| Sales & office | 21.6% |
| Natural resources & construction | 8.9% |
| Production & transportation | 16.0% |
Employment type
| Type | % |
|---|---|
| Private sector | 82.0% |
| Government | 14.2% |
| Self-employed | 3.7% |
| Unpaid family workers | 0.1% |
Commute
| Method | % |
|---|---|
| Drive alone | 79.1% |
| Carpool | 8.5% |
| Public transit | 2.0% |
| Walk | 1.6% |
| Other means | 1.0% |
| Avg commute (minutes) | 24.5 |
Poverty
All people
15.2%
Under 18 years
22.4%
18 and over
13.2%
Married-couple families
5.0%
Female-led households
26.4%
Income support
| Source | % of households |
|---|---|
| Social Security | 32.7% |
| Retirement income | 28.6% |
| Supplemental Security | 6.5% |
| Cash public assistance | 3.0% |
| Food stamps / SNAP | 18.2% |
Health indicators
| Condition | % |
|---|---|
| High blood pressure | 36.9% |
| High cholesterol | 30.4% |
| Heart disease | 6.3% |
| Stroke | 3.7% |
| Asthma | 10.6% |
| Arthritis | 26.0% |
| Kidney disease | 3.2% |
| Pulmonary disease | 7.3% |
| Cancer | 6.1% |
| Behavior / access | % |
|---|---|
| Binge drinking | 15.0% |
| No physical activity | 26.9% |
| Less than 7 hrs sleep | 35.0% |
| Fair or poor health | 17.0% |
| Poor mental health | 13.6% |
| Poor physical health | 10.7% |
| No health insurance | 12.3% |
| Visited doctor (checkup) | 80.2% |
| Visited dentist | 64.2% |
| Cholesterol screening | 89.0% |
| Teeth loss | 17.9% |
Veterans & disability
| Veterans | Count | % |
|---|---|---|
| Civilian veterans | 22,877 | 11.4% |
| Disability | % |
|---|---|
| Any disability | 16.3% |
| Under 18 | 4.1% |
| 18–64 years | 15.3% |
| 65 and over | 38.2% |
Health insurance coverage
| Type | % |
|---|---|
| Private insurance | 66.0% |
| Public insurance | 42.3% |
| Uninsured under 19 | 3.6% |
Language & origin
Language spoken at home (age 5+)
| Language | Count | % |
|---|---|---|
| English only | 234,008 | 93.6% |
| Spanish | 3,381 | 1.6% |
| Other Indo-European | 1,717 | 0.9% |
| Asian & Pacific Islander | 432 | 0.3% |
| Other languages | 837 | 0.2% |
Place of birth & citizenship
| Origin | Count | % |
|---|---|---|
| Native born (US) | 241,327 | 97.5% |
| Born in same state | 237,184 | 96.2% |
| Born in different state | 143,195 | 60.5% |
| Foreign born | 4,143 | 1.3% |
| Naturalized citizen | 7,564 | 2.5% |
| Not a US citizen | 4,756 | 50.3% |
Ancestry
| Ancestry | Count | % |
|---|---|---|
| Italian | 23,070 | 9.3% |
| French | 19,599 | 7.9% |
| Arab | 10,004 | 4% |
| English | 1,931 | 0.8% |
| Polish | 1,442 | 0.6% |
| Ancestry | Count | % |
|---|---|---|
| Irish | 725 | 0.3% |
| Norwegian | 594 | 0.2% |
| German | 574 | 0.2% |
| Dutch | 336 | 0.1% |
Technology access
| Metric | % of households |
|---|---|
| Computer access | 38.8% |
| Internet access | 91.1% |
Source: U.S. Census Bureau, American Community Survey 2025 estimates.
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