Whatcom County is a county located in the northwestern corner of the U.S. state of Washington, bordered by the Lower Mainland of British Columbia to the north, Okanogan County to the east, Skagit County to the south, San Juan County across Rosario Strait to the southwest, and the Strait of Georgia to the west. Its county seat and largest population center is the coastal city of Bellingham, comprising the Bellingham, WA Metropolitan Statistical Area, and as of the 2020 census, the county's population was 226,847. The county was created from Island County by the Washington Territorial Legislature in March 1854. It originally included the territory of present-day San Juan and Skagit Counties, which were later independently organized after additional settlement. Its name derives from the Lummi word Xwotʼqom, also spelled [x̣ʷátqʷəm], perhaps meaning "noisy" or "noisy water" and referring to a waterfall.

Founded: March 9, 1854
Named for: Chief Whatcom
Seat: Bellingham
Largest city: Bellingham
Total: 2,503 sq mi (6,482.74 km²)
Land: 2,107 sq mi (5,457.1 km²)
Water: 397 sq mi (1,028.23 km²), 16%
Density: 103/sq mi (/km²)
Time zone: Pacific: UTC-8-7
Official Website: https://www.co.whatcom.wa.us/
Wikidata description: county in the state of Washington, United States
Wikidata id: Q156623
Wikidata label: Whatcom County
Wikidata aliases: Array
Source
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