St. Clair County, IL

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Main / Illinois / St. Clair County

St. Clair County, Illinois demographics

Population: 258,597
Median age: 39.2

Median household income: 63,017

Demographics, population, home values, social and economic characteristics of St. Clair County, Illinois.

Population

2021258,597
2020261,186
2019262,338
2018263,463
2017264,433
2016265,569
2015267,029
2014268,415
2013268,939
2012268,873
2011268,086
2010266,727
2009261,268

St. Clair County, IL cities

Alorton village - 1,864

Belleville city - 42,463

Brooklyn village - 627

Cahokia village - 12,440

Caseyville village - 4,185

Centreville city - 4,346

Collinsville city - 24,627

Columbia city - 11,090

Darmstadt CDP - 0

Dupo village - 4,001

East Carondelet village - 276

East St. Louis city - 19,437

Fairmont City village - 2,176

Fairview Heights city - 16,601

Fayetteville village - 395

Floraville CDP - 31

Freeburg village - 4,195

Hecker village - 554

Lebanon city - 4,737

Lenzburg village - 423

Madison city - 2,752

Marissa village - 1,288

Mascoutah city - 8,803

Millstadt village - 4,071

New Athens village - 1,883

New Baden village - 3,418

O'Fallon city - 31,963

Paderborn CDP - 26

Rentchler CDP - 0

Sauget village - 189

Scott AFB CDP - 4,219

Shiloh village - 13,638

Smithton village - 4,192

St. Libory village - 643

Summerfield village - 339

Swansea village - 15,037

Washington Park village - 2,732

St. Clair County, IL ZIP Codes

Census data for St. Clair County, Illinois

Demographic and housing estimates in St. Clair County, Illinois

Total population
Total population258,597
Male125,532
Female133,065
Population by age
Total population258,597
Under 5 years15,955
5 to 9 years16,333
10 to 14 years18,343
15 to 19 years16,354
20 to 24 years15,170
25 to 34 years33,225
35 to 44 years33,468
45 to 54 years32,457
55 to 59 years18,144
60 to 64 years18,084
65 to 74 years24,670
75 to 84 years11,390
85 years and over5,004
Median age (years)39.2
Under 18 years61,160
16 years and over204,091
18 years and over197,437
21 years and over188,299
62 years and over51,509
65 years and over41,064
Population by race
Total population258,597
One race245,537
   White161,899
   Black or African American75,455
   American Indian and Alaska Native358
   Asian3,813
   Native Hawaiian and Other Pacific Islander97
   Some other race3,915
Two or more races13,060
Citizen, voting age population
Citizen, VOTING AGE 18 and over population194,040
Male Citizen, VOTING AGE 18 and over population92,230
Female Citizen, VOTING AGE 18 and over population101,810

Social characteristics in St. Clair County, Illinois

Households by type
Total households100,079
Family households (families)44,293
Married-couple family5,650
Male householder, no wife present, family18,294
Female householder, no husband present, family13,984
Nonfamily households31,842
Average household size29,136
Average family size2.55

Economic characteristics in St. Clair County, Illinois

Income and benefits (in inflation-adjusted dollars)
Total households100,079
Less than $10,0006,757
$10,000 to $14,9994,127
$15,000 to $24,9999,293
$25,000 to $34,9998,508
$35,000 to $49,99912,624
$50,000 to $74,99917,392
$75,000 to $99,99913,001
$100,000 to $149,99914,847
$150,000 to $199,9997,822
$200,000 or more5,708
Median household income (dollars)63,017

Housing characteristics in St. Clair County, Illinois

Housing occupancy
Total housing units115,125
Occupied housing units100,079
Vacant housing units15,046
Units in structure
Total housing units115,125
1-unit, detached81,516
1-unit, attached4,622
2 units4,648
3 or 4 units4,768
5 to 9 units7,247
10 to 19 units2,721
20 or more units3,737
Mobile home5,866
Boat, RV, van, etc.0
Year structure built
Total housing units115,125
Built 2014 or later142
Built 2010 to 20136,914
Built 2000 to 200915,504
Built 1990 to 199914,653
Built 1980 to 198913,371
Built 1970 to 197913,252
Built 1960 to 196912,897
Built 1950 to 195916,522
Built 1940 to 19496,367
Built 1939 or earlier15,503
Rooms
Total housing units115,125
1 room1,491
2 rooms1,537
3 rooms7,839
4 rooms18,117
5 rooms22,836
6 rooms21,968
7 rooms14,174
8 rooms11,295
9 rooms or more15,868
Median rooms5.8
Bedrooms
Total housing units115,125
No bedroom1,606
1 bedroom10,086
2 bedrooms33,071
3 bedrooms45,521
4 bedrooms19,698
5 or more bedrooms5,143
Housing tenure
Occupied housing units100,079
Owner-occupied66,635
Renter-occupied33,444
Average household size of owner-occupied unit2.64
Average household size of renter-occupied unit2.36
Year householder moved into unit
Occupied housing units100,079
Moved in 2017 or later8,795
Moved in 2015 to 201627,383
Moved in 2010 to 201416,627
Moved in 2000 to 200921,321
Moved in 1990 to 199912,572
Moved in 1989 and earlier13,381
Value
Owner-occupied units66,635
Less than $50,0008,490
$50,000 to $99,99914,466
$100,000 to $149,99912,655
$150,000 to $199,99910,818
$200,000 to $299,99913,114
$300,000 to $499,9995,880
$500,000 to $999,999977
$1,000,000 or more235
Median (dollars)140,600
Mortgage status
Owner-occupied units66,635
Housing units with a mortgage40,290
Housing units without a mortgage26,345
Gross rent
Occupied units paying rent31,920
Less than $5004,054
$500 to $99914,672
$1,000 to $1,49910,022
$1,500 to $1,9992,182
$2,000 to $2,499552
$2,500 to $2,999187
$3,000 or more251
Median (dollars)923
No rent paid1,524

Demographic data for St. Clair County, IL and each city in the county. Lists of cities by population, wealth and poverty in St. Clair County, IL.

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