St. Louis County

county in Missouri, United States
AdministrativeArea county_of_missouri Q498034
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Summary

St. Louis County is a county of Missouri[1]. It ranks in the top 0.88% of county of missouri entities by monthly Wikipedia readership (2,630 views/month, #1 of 114).[2]

Key Facts

  • Located in the administrative territorial entity: Missouri[3]
  • Country: United States[4]
  • Capital: Clayton[5]
  • Shares border with: St. Charles County[6], St. Louis[7], Jefferson County[8], Madison County[9], Franklin County[10], St. Clair County[11], Monroe County[12]
  • Named after: Louis IX of France[13]
  • Contains the administrative territorial entity: Clayton[14]
  • Headquarters location: Clayton[15]
  • Twinned administrative body: Samara[16]
  • Commons category: St. Louis County, Missouri[17]
  • Inception: October 1, 1812[18]
  • Coordinate location: 38.64, -90.44[19]
  • Authority: government of St. Louis County[20]
  • Official website: https://stlouiscountymo.gov/[21]
  • Topic's main category: Category:St. Louis County, Missouri[22]
  • Population: 998,954[23], 998,920[24], 999,171[25], 1,000,473[26], 1,001,444[27], 1,003,362[28], 1,004,125[29]
  • Described by source: The American Cyclopædia[30]
  • List of monuments: National Register of Historic Places listings in St. Louis County, Missouri[31]
  • Category for people born here: Category:Births in St. Louis County, Missouri[32]
  • Category for people who died here: Category:Deaths in St. Louis County, Missouri[33]
  • Number of households: 409,658[34]
  • Native label: St. Louis County[35]
  • NCI Thesaurus ID: C109266[36]
  • Category of associated people: Category:People from St. Louis County, Missouri[37]
  • Different from: St. Louis County[38], St. Louis[39]
  • Area: 1356[40]

Why It Matters

St. Louis County has Wikipedia articles in 22 language editions, a strong signal of global cultural recognition.[41] It is known by 57 alternative names across languages and contexts.[42]

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. [3] ↑ . wikidata.org.
  11. [13] ↑ . 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] ↑ . wikidata.org.
  19. [21] ↑ . wikidata.org.
  20. [22] ↑ . wikidata.org.
  21. [23] ↑ . wikidata.org.
  22. [24] ↑ . wikidata.org.
  23. [25] ↑ . wikidata.org.
  24. [26] ↑ . wikidata.org.
  25. [27] ↑ . wikidata.org.
  26. [28] ↑ . wikidata.org.
  27. [29] ↑ . wikidata.org.
  28. [30] ↑ . wikidata.org.
  29. [31] ↑ . wikidata.org.
  30. [32] ↑ . wikidata.org.
  31. [33] ↑ . wikidata.org.
  32. [34] ↑ . wikidata.org.
  33. [35] ↑ . wikidata.org.
  34. [36] ↑ . wikidata.org.
  35. [37] ↑ . wikidata.org.
  36. [38] ↑ . wikidata.org.
  37. [39] ↑ . wikidata.org.
  38. [40] ↑ . wikidata.org.

Class ancestry

  1. [1] ↑ . Wikidata. wikidata.org.

Aggregate / graph-position facts

  1. [2] ↑ . Wikimedia Foundation. dumps.wikimedia.org.
  2. [41] ↑ . Wikidata sitelinks. wikidata.org.
  3. [42] ↑ . 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. Louis County. Retrieved October 14, 2026, from https://4ort.xyz/entity/st-louis-county
MLA “St. Louis County.” 4ort.xyz Knowledge Graph, 4ort.xyz, 14 Oct. 2026, https://4ort.xyz/entity/st-louis-county.
BibTeX @misc{4ortxyz_st-louis-county_2026, author = {{4ort.xyz Knowledge Graph}}, title = {{St. Louis County}}, year = {2026}, url = {https://4ort.xyz/entity/st-louis-county}, note = {Accessed: 2026-10-14}}
LLM prompt According to 4ort.xyz Knowledge Graph (aggregator of Wikidata, Wikipedia, and authoritative open-data sources): St. Louis County — https://4ort.xyz/entity/st-louis-county (retrieved 2026-10-14)

Canonical URL: https://4ort.xyz/entity/st-louis-county · Last refreshed:

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. 5w ago · Theklan · 2026-09-04 view diff on Wikidata ↗
    P14687 → Data:US presidential elections by county/St. Louis County, M
    "/* wbsetclaim-create:2||1 */ P14687: Data:US presidential elections by county/St. Louis County, Missouri.tab, Link US presidential election dataset (P14687, subject: United States preside"
  2. 9w ago · RVA2869 · 2026-08-14 view diff on Wikidata ↗
    Official website → https://stlouiscountymo.gov/
    Legal entity identifier → —
    Domain name → st-louis.mo.us
    Social media followers → —
    + 2 other properties edited (see Wikidata diff for full list)
    "/* wbeditentity-update-languages-and-other-short:0||pt, es, ar, en, fr, tr, eo, de, it, mul */ Cleanup: remove wikimedia+duplicate refs; add mul alias ([[User:Difool/WikidataCleanup]])"
  3. 19w ago · Mxn · 2026-06-04 view diff on Wikidata ↗
    Authority → government of St. Louis County
    "/* wbsetclaim-create:2||1 */ Authority: government of St. Louis County"
  4. 22w ago · Mahir256 · 2026-05-13 view diff on Wikidata ↗
    Located in → —
    Capital → Clayton
    Country → United States
    List of monuments → National Register of Historic Places listings in St. Louis County, Missouri
    + 37 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.