Eureka

city in and county seat of Humboldt County, California, United States
Place city_of_california Q488702
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Summary

Eureka is a city of California[1]. Eureka draws 4,410 Wikipedia views per month (city of california category, ranking #9 of 87).[2]

Key Facts

  • Award received: Coast Guard City[3]
  • Located in the administrative territorial entity: Humboldt County[4]
  • Country: United States[5]
  • Instance of: charter city[6], county seat[7]
  • Twinned administrative body: Kamisu[8], Nelson[9]
  • Postal code: 95501[10], 95502[11], 95503[12]
  • Commons category: Eureka, California[13]
  • Located in time zone: Pacific Time Zone[14]
  • Local dialing code: 707[15]
  • Inception: May 13, 1850[16]
  • Official website: http://www.ci.eureka.ca.gov[17]
  • Topic's main category: Category:Eureka, California[18]
  • Population: 612[19], 27,191[20], 26,512[21]
  • Described by source: Meyers Konversations-Lexikon, 4th edition (1885–1890)[22], Encyclopædia Britannica 11th edition[23]
  • Capital of: Humboldt County[24]
  • Heritage designation: California Historical Landmark[25]
  • Official name: Eureka[26]
  • Category for people born here: Q32755816[27]
  • Category for people who died here: Q32661737[28]
  • Number of households: 11,216[29]
  • Category of associated people: Category:People from Eureka, California[30]
  • Different from: Yreka[31]
  • Elevation above sea level: 39 feet[32]
  • Area: 37.434816 km²[33], 37.43484 km²[34]
  • Water as percent of area: 35.0742 percent[35]

Why It Matters

Eureka has Wikipedia articles in 25 language editions, a strong signal of global cultural recognition.[36] Eureka is known by 22 alternative names across languages and contexts.[37]

FAQs

What awards did Eureka receive?

Honors received include Coast Guard City[3].

References

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

Direct Wikidata claims

  1. [5] ↑ . wikidata.org.
  2. [6] ↑ . cacities.org. Retrieved . cacities.org. Provenance: wikidata.org.
  3. [7] ↑ . wikidata.org.
  4. [4] ↑ . wikidata.org.
  5. [3] ↑ . wikidata.org.
  6. [8] ↑ . wikidata.org.
  7. [9] ↑ . wikidata.org.
  8. [10] ↑ . wikidata.org.
  9. [11] ↑ . wikidata.org.
  10. [12] ↑ . 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] ↑ . 2010 United States Census. Retrieved . census.gov. Provenance: wikidata.org.
  19. [21] ↑ . 2020 United States Census. Retrieved . data.census.gov. Provenance: 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] ↑ . 2016–2020 American Community Survey. Retrieved . data.census.gov. Provenance: wikidata.org.
  28. [30] ↑ . wikidata.org.
  29. [31] ↑ . wikidata.org.
  30. [32] ↑ . wikidata.org.
  31. [33] ↑ . 2016 U.S. Gazetteer Files. wikidata.org.
  32. [34] ↑ . 2010 United States Census. Retrieved . census.gov. Provenance: wikidata.org.
  33. [35] ↑ . 2010 United States Census. Retrieved . census.gov. Provenance: wikidata.org.

Class ancestry

  1. [1] ↑ . Wikidata. wikidata.org.

Aggregate / graph-position facts

  1. [2] ↑ . Wikimedia Foundation. dumps.wikimedia.org.
  2. [36] ↑ . Wikidata sitelinks. wikidata.org.
  3. [37] ↑ . 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). Eureka. Retrieved October 10, 2026, from https://4ort.xyz/entity/eureka
MLA “Eureka.” 4ort.xyz Knowledge Graph, 4ort.xyz, 10 Oct. 2026, https://4ort.xyz/entity/eureka.
BibTeX @misc{4ortxyz_eureka_2026, author = {{4ort.xyz Knowledge Graph}}, title = {{Eureka}}, year = {2026}, url = {https://4ort.xyz/entity/eureka}, note = {Accessed: 2026-10-10}}
LLM prompt According to 4ort.xyz Knowledge Graph (aggregator of Wikidata, Wikipedia, and authoritative open-data sources): Eureka — https://4ort.xyz/entity/eureka (retrieved 2026-10-10)

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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. 6w ago · Susmuffin · 2026-08-24 view diff on Wikidata ↗
    Country → —
    Website → —
    Located in the statistical territorial entity → Eureka-Arcata micropolitan area
    Postal code → 95501, 95502, 95503
    + 34 other properties edited (see Wikidata diff for full list)
    "/* wbsetclaim-create:1||1 */ Harper's tag: eureka, Matched to [[:toollabs:mix-n-match/#/entry/289927266|eureka (#289927266)]] in [[:toollabs:mix-n-match/#/catalog/7915|Harper's tag]] #mix'n'mat"
Live feed via Wikidata EventStreams. New edits appear within minutes of being made on Wikidata.