Every ZIP code in the United States, with weather, radar, trivia and the numbers behind it. Five digits since 1963!

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zipcodes.pro — STATE/IL/COUNTY/ST-CLAIR

St. Clair County, IL ZIP codes

There are 30 ZIP codes in St. Clair County, IL, in 20 towns, from 62059 to 62289. The largest are 62269 (O Fallon), 62221 (Belleville) and 62226 (Belleville).

The county seat is Belleville.

ZIP codes
30
Towns
20
County seat
Belleville
County FIPS
17163
Population
253,694
Median household income
$73,854
Land area
658 sq mi
Area codes
618, 730
Metro area
St. Louis

St. Clair County ZIP codes by town

Belleville (county seat)
62220, 62221, 62222, 62223, 62226

Each ZIP code is listed under the county most of its land lies in and the town the Postal Service names it for; a ZIP code's own page shows exactly how it is split.

Map of St. Clair County ZIP codes

620596207162201622026220362204622056220662207622086222062221622226222362225622266223262239622406224362254622556225762258622606226462269622826228562289

The ZIP codes of St. Clair County, shaded. Outlines are Census ZIP Code Tabulation Areas (2020), which approximate the mail routes; PO-box and single-address codes have no area and are not drawn. Click any area to open its ZIP code.

St. Clair County in numbers

About 253,694 people live in St. Clair County, in 100,846 households, the 9th most populous of Illinois's 102 counties. The median household income is $73,854 a year, 11% below the Illinois median of $83,390 (US: $80,734). The median owner-occupied home is valued at $180,300 (32% below the Illinois median), and median gross rent is $1,090 a month. The median age is 39.9; 31.8% of adults 25 and over hold a bachelor's degree or higher (37.8% across Illinois); the average commute takes 24 minutes.

Population253,694St. Clair253,694
Households100,846St. Clair100,846
Median age39.9St. Clair39.9Illinois39.0US 38.9
Median household income$73,854St. Clair$73,854Illinois$83,390US $80,734
Median home value$180,300St. Clair$180,300Illinois$263,300US $332,700
Median gross rent$1,090St. Clair$1,090Illinois$1,274US $1,413
Bachelor's degree or higher31.8%St. Clair31.8%Illinois37.8%US 35.7%
Mean commute24.0 minSt. Clair24.0 minIllinois27.8 minUS 26.4 min
Population density386 / sq miSt. Clair386 / sq mi

U.S. Census Bureau, American Community Survey 2020–2024 5-year estimates. Survey estimates carry margins of error, wider for small places. Sources and methods.

Largest towns in St. Clair County

Largest towns in St. Clair County
TownZIP codesPopulation
Belleville 5 41,370
O Fallon 1 32,262
East St. Louis 7 17,999
Fairview Heights 1 16,745
Mascoutah 1 8,816
Scott Air Force Base 1 5,242
Freeburg 1 4,592
Lebanon 1 4,474
Caseyville 1 4,130
Millstadt 1 4,008
Dupo 1 3,879
Smithton 1 3,680
New Athens 1 1,933
Marissa 1 1,232
Lovejoy 1 729

Population of the census place of that name where there is one, otherwise of the ZIP codes the Postal Service addresses by it. A town's ZIP codes can reach past the county line.

Neighbouring counties

Counties that share a ZIP code with St. Clair County.

Not sure you are in St. Clair County? What county am I in? answers from your location, near a county line included.

Every ZIP code in St. Clair County, with figures

ZIP codes in St. Clair County
ZIP City Type Population Median income Median home
62059 Lovejoy , IL Standard 729 $30,673 $37,500
62071 National Stock Yards , IL No street area — — —
62201 East Saint Louis , IL Standard 4,921 $27,437 $60,000
62202 East Saint Louis , IL No street area — — —
62203 East Saint Louis , IL Standard 5,465 $42,111 $68,700
62204 East Saint Louis , IL Standard 4,055 $35,346 $47,800
62205 East Saint Louis , IL Standard 6,459 $45,672 $41,800
62206 East Saint Louis , IL Standard 12,959 $33,838 $53,200
62207 East Saint Louis , IL Standard 6,984 $29,845 $58,200
62208 Fairview Heights , IL Standard 16,821 $80,205 $176,000
62220 Belleville , IL Standard 19,152 $65,952 $157,400
62221 Belleville , IL Standard 29,875 $82,271 $217,500
62222 Belleville , IL No street area — — —
62223 Belleville , IL Standard 16,269 $73,700 $159,400
62225 Scott Air Force Base , IL Standard 5,242 $103,284 —
62226 Belleville , IL Standard 28,255 $70,797 $167,000
62232 Caseyville , IL Standard 7,063 $64,269 $125,000
62239 Dupo , IL Standard 4,232 $61,191 $111,400
62240 East Carondelet , IL Standard 1,796 $96,063 $89,400
62243 Freeburg , IL Standard 6,418 $103,342 $279,500
62254 Lebanon , IL Standard 6,710 $96,492 $218,000
62255 Lenzburg , IL Standard 1,092 $80,506 $160,800
62257 Marissa , IL Standard 2,046 $78,750 $138,100
62258 Mascoutah , IL Standard 10,437 $94,655 $232,500
62260 Millstadt , IL Standard 6,668 $91,039 $252,500
62264 New Athens , IL Standard 3,097 $57,015 $127,400
62269 O Fallon , IL Standard 35,923 $103,818 $291,800
62282 Saint Libory , IL Standard 563 $117,143 $179,300
62285 Smithton , IL Standard 4,239 $136,345 $274,400
62289 Summerfield , IL Standard 273 $47,237 $64,500

Cite this page

zipcodes.pro. “St. Clair County ZIP codes.” Data release 2026-10-12. Retrieved 2026-10-20. https://zipcodes.pro/state/il/county/st-clair

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