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St. Clair County

county in Illinois, United States
AdministrativeArea county_of_illinois Q486507
St. Clair County
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St. Clair County

Summary

St. Clair County is a county of Illinois[1]. It ranks in the top 6% of county_of_illinois entities by monthly Wikipedia readership (272 views/month).[2]

Key Facts

  • St. Clair County is located in Illinois[3].
  • St. Clair County is in the country of United States[4].
  • St. Clair County's instance of is recorded as county of Illinois[5].
  • St. Clair County's capital is recorded as Belleville[6].
  • St. Clair County's shares border with is recorded as Madison County[7].
  • St. Clair County's shares border with is recorded as Randolph County[8].
  • St. Clair County's shares border with is recorded as Monroe County[9].
  • St. Clair County's shares border with is recorded as Clinton County[10].
  • St. Clair County's shares border with is recorded as Washington County[11].
  • St. Clair County's shares border with is recorded as St. Louis County[12].
  • St. Clair County's shares border with is recorded as St. Louis[13].
  • Arthur St. Clair is named after St. Clair County[14].
  • St. Clair County's Commons category is recorded as St. Clair County, Illinois[15].
  • April 27, 1790 marks the founding of St. Clair County[16].
  • St. Clair County's coordinate location is recorded as {'lat': 38.47, 'lon': -89.93}[17].
  • St. Clair County's official website is recorded as http://www.co.st-clair.il.us[18].
  • St. Clair County's topic's main category is recorded as Category:St. Clair County, Illinois[19].
  • St. Clair County has a population of {'amount': '+270056'}[20].
  • St. Clair County has a population of {'amount': '+270420'}[21].
  • St. Clair County has a population of {'amount': '+270118'}[22].
  • St. Clair County has a population of {'amount': '+268714'}[23].
  • St. Clair County has a population of {'amount': '+266955'}[24].
  • St. Clair County has a population of {'amount': '+264052'}[25].
  • St. Clair County has a population of {'amount': '+257400'}[26].
  • St. Clair County's list of monuments is recorded as National Register of Historic Places listings in St. Clair County, Illinois[27].

Body

Geography

St. Clair County is in the country of United States[4]. It is located in Illinois[3].

Physical Characteristics

St. Clair County covers an area of {'unit': 'Q712226', 'amount': '+1746'}[28]. Population counts include {'amount': '+270056'}[20], {'amount': '+270420'}[21], {'amount': '+270118'}[22], {'amount': '+268714'}[23], {'amount': '+266955'}[24], and {'amount': '+264052'}[25].

Designation and Status

St. Clair County's instance of is recorded as county of Illinois[5].

History and Context

April 27, 1790 marks the founding of St. Clair County[16]. Arthur St. Clair is named after it[14].

Why It Matters

St. Clair County ranks in the top 6% of county_of_illinois entities by monthly Wikipedia readership (272 views/month).[2] It has Wikipedia articles in 21 language editions, a strong signal of global cultural recognition.[29] It is known by 27 alternative names across languages and contexts.[30]

Related Entities

Illinois United States

References

Programmatic citations — every numbered marker resolves to a verifiable graph row below.

Direct Wikidata claims

  1. [4] ↑ . wikidata.org.
  2. [5] ↑ . wikidata.org.
  3. [6] ↑ . wikidata.org.
  4. [7] ↑ . wikidata.org.
  5. [8] ↑ . wikidata.org.
  6. [9] ↑ . wikidata.org.
  7. [10] ↑ . wikidata.org.
  8. [11] ↑ . wikidata.org.
  9. [12] ↑ . wikidata.org.
  10. [13] ↑ . wikidata.org.
  11. [3] ↑ . wikidata.org.
  12. [14] ↑ . wikidata.org.
  13. [15] ↑ . wikidata.org.
  14. [16] ↑ . wikidata.org.
  15. [17] ↑ . wikidata.org.
  16. [18] ↑ . wikidata.org.
  17. [19] ↑ . wikidata.org.
  18. [20] ↑ . 2010 United States Census. Retrieved . census.gov. Provenance: wikidata.org.
  19. [21] ↑ . census.gov. census.gov. Provenance: wikidata.org.
  20. [22] ↑ . census.gov. census.gov. Provenance: wikidata.org.
  21. [23] ↑ . census.gov. census.gov. Provenance: wikidata.org.
  22. [24] ↑ . census.gov. census.gov. Provenance: wikidata.org.
  23. [25] ↑ . Population Estimates Program. census.gov. Provenance: wikidata.org.
  24. [26] ↑ . 2020 United States Census. Retrieved . data.census.gov. Provenance: wikidata.org.
  25. [27] ↑ . wikidata.org.
  26. [28] ↑ . wikidata.org.

Class ancestry

  1. [1] ↑ . Wikidata. wikidata.org.

Aggregate / graph-position facts

  1. [2] ↑ . Wikimedia Foundation. dumps.wikimedia.org.
  2. [29] ↑ . Wikidata sitelinks. wikidata.org.
  3. [30] ↑ . Wikidata aliases. wikidata.org.

📑 Cite this page

Use these citations when quoting this entity in research, articles, AI prompts, or wherever provenance matters. We aggregate Wikidata + Wikipedia + authoritative open-data sources; the stitched, scored, cross-referenced view is what 4ort.xyz contributes.

APA 4ort.xyz Knowledge Graph. (2026). St. Clair County. Retrieved May 3, 2026, from https://4ort.xyz/entity/st-clair-county
MLA “St. Clair County.” 4ort.xyz Knowledge Graph, 4ort.xyz, 3 May. 2026, https://4ort.xyz/entity/st-clair-county.
BibTeX @misc{4ortxyz_st-clair-county_2026, author = {{4ort.xyz Knowledge Graph}}, title = {{St. Clair County}}, year = {2026}, url = {https://4ort.xyz/entity/st-clair-county}, note = {Accessed: 2026-05-03}}
LLM prompt According to 4ort.xyz Knowledge Graph (aggregator of Wikidata, Wikipedia, and authoritative open-data sources): St. Clair County — https://4ort.xyz/entity/st-clair-county (retrieved 2026-05-03)

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Edit History

Rolling log of changes to this entity's Wikidata record. Values shown reflect the current state of each edited property — follow the history link to see the precise diff for any edit.

  1. 19d ago · Mahir256 · 2026-05-13 view diff on Wikidata ↗
    Category of associated people → Category:People from St. Clair County, Illinois
    Shares border with → Madison County, Randolph County, Monroe County +4
    Category for maps or plans → Category:Maps of St. Clair County, Illinois
    Population → —
    + 32 other properties edited (see Wikidata diff for full list)
    "/* wbeditentity-update:0| */ QuickStatements 3.0 [[:toollabs:qs-dev/batch/31546|batch #31546]]"
Live feed via Wikidata EventStreams. New edits appear within minutes of being made on Wikidata.