St. Clair County, Illinois

In four numbers

People

253,694

Median household income

$73,854

±1,990

Unemployed

6.0%

7,396 of 124,124 in the labour force

Homes with broadband

89.7%

90,490 of 100,846 households

U.S. Census Bureau, American Community Survey 5-year estimates 2020-2024; read 2026-09-26. Percentages worked out here from the two counts shown.

Who governs here

U.S. Census Bureau, 2022 Census of Governments, Government Units List (published August 2023); the file read 2026-09-26. Offices are placed by county; a special district’s territory can cross county lines. Each body posts its own meetings on its website where the Census records one.

School districts based here

• Belle Valley SD 119

  School district1 schools

  2465 Amann Dr, Belleville, IL, 62220

  Its website — where its board posts meetings. Federal record.

• Belleville Area Special Services

  Specialized district2 schools

  2411 Pathways Xing, Belleville, IL, 62221

  Federal record.

• Belleville SD 118

  School district11 schools

  105 W A St, Belleville, IL, 62220

  Its website — where its board posts meetings. Federal record.

• Belleville Twp HSD 201

  School district4 schools

  920 N Illinois St, Belleville, IL, 62220

  Its website — where its board posts meetings. Federal record.

• Brooklyn UD 188

  School district3 schools

  800 Madison St, Lovejoy, IL, 62059

  Its website — where its board posts meetings. Federal record.

• Cahokia CUSD 187

  School district9 schools

  1700 Jerome Ln, Cahokia, IL, 62206

  Its website — where its board posts meetings. Federal record.

• Central SD 104

  School district2 schools

  303 Hartman Ln, O Fallon, IL, 62269

  Its website — where its board posts meetings. Federal record.

• Comm Unit School District No 196

  School district3 schools

  600 Louisa Ave, Dupo, IL, 62239

  Its website — where its board posts meetings. Federal record.

• E St Louis Area Joint Agreement

  Specialized district0 schools

  1005 State St, East Saint Louis, IL, 62201

  Federal record.

• East St Louis SD 189

  School district12 schools

  1005 State St, East Saint Louis, IL, 62201

  Its website — where its board posts meetings. Federal record.

• Freeburg CCSD 70

  School district2 schools

  408 S Belleville St, Freeburg, IL, 62243

  Its website — where its board posts meetings. Federal record.

• Freeburg CHSD 77

  School district1 schools

  401 S Monroe St, Freeburg, IL, 62243

  Federal record.

• Grant CCSD 110

  School district2 schools

  10110 Old Lincoln Trl, Fairview Heights, IL, 62208

  Its website — where its board posts meetings. Federal record.

• Harmony Emge SD 175

  School district3 schools

  7401 Westchester Dr, Belleville, IL, 62223

  Its website — where its board posts meetings. Federal record.

• High Mount SD 116

  School district1 schools

  1721 Boul Ave, Swansea, IL, 62226

  Its website — where its board posts meetings. Federal record.

• Lebanon CUSD 9

  School district2 schools

  200 W Schuetz St, Lebanon, IL, 62254

  Its website — where its board posts meetings. Federal record.

• Marissa CUSD 40

  School district2 schools

  1 E Marissa St, Marissa, IL, 62257

  Its website — where its board posts meetings. Federal record.

• Mascoutah CUD 19

  School district5 schools

  421 W Harnett St, Mascoutah, IL, 62258

  Its website — where its board posts meetings. Federal record.

• Millstadt CCSD 160

  School district2 schools

  211 W Mill St, Millstadt, IL, 62260

  Its website — where its board posts meetings. Federal record.

• New Athens CUSD 60

  School district3 schools

  501 Hanft St, New Athens, IL, 62264

  Federal record.

• O Fallon CCSD 90

  School district7 schools

  118 E Washington St, O Fallon, IL, 62269

  Its website — where its board posts meetings. Federal record.

• O Fallon Twp HSD 203

  School district1 schools

  600 S Smiley St, O Fallon, IL, 62269

  Its website — where its board posts meetings. Federal record.

• Pontiac-W Holliday SD 105

  School district2 schools

  400 Ashland Ave, Fairview Heights, IL, 62208

  Its website — where its board posts meetings. Federal record.

• Shiloh Village SD 85

  School district2 schools

  125 Diamond Ct, Shiloh, IL, 62269

  Its website — where its board posts meetings. Federal record.

• Signal Hill SD 181

  School district1 schools

  40 Signal Hill Pl, Belleville, IL, 62223

  Its website — where its board posts meetings. Federal record.

• Smithton CCSD 130

  School district1 schools

  316 S Hickory St, Smithton, IL, 62285

  Its website — where its board posts meetings. Federal record.

• St Clair ROE Special Education

  Specialized district0 schools

  1000 S Illinois St, Belleville, IL, 62220

  Federal record.

• St Libory Cons SD 30

  School district1 schools

  811 Darmstadt St, St. Libory, IL, 62282

  Its website — where its board posts meetings. Federal record.

• Whiteside SD 115

  School district2 schools

  111 Warrior Way, Belleville, IL, 62221

  Its website — where its board posts meetings. Federal record.

• Wolf Branch SD 113

  School district2 schools

  410 Huntwood Rd, Swansea, IL, 62226

  Its website — where its board posts meetings. Federal record.

National Center for Education Statistics, Common Core of Data 2024-25; read 2026-09-26.

Farmers markets

• Belleville Old Town Farmers Market

  620 N. Illinois Street Belleville, IL, 62220

  Gathered by USDA from the web; USDA record last changed 2023-03-20. USDA listing

• Vine Street Market at O'Fallon Station

  212 E 1st Street, O'Fallon, IL, 62269

  Submitted by the market; USDA record last changed 2021-01-25. USDA listing

• Swansea Farmers' Market

  2801 N. Illinois St., Swansea, IL, 62226

  Gathered by USDA from the web; USDA record last changed 2023-03-20. USDA listing

USDA National Farmers Market Directory; read 2026-09-26.