Whatcom County is located in the northwest corner of Washington State, and is bordered by the Canadian province of British Columbia. It is the 12th most populous county in the state, with a population of 221,721 as of 2019. The county seat is Bellingham, and the largest city is also Bellingham.

Whatcom County is governed by a three-member Board of County Commissioners, who are elected by the citizens of the county. The county is divided into seven districts, each of which is represented by one commissioner. The county also has a number of other elected officials, including a prosecuting attorney, sheriff, auditor, treasurer, and assessor.

Whatcom County is home to a number of state parks, including Larrabee State Park, Lake Samish State Park, and Birch Bay State Park. The county is also home to a number of recreational areas, including Lake Whatcom, Lake Padden, and Lake Terrell. The county is also home to a number of ski resorts, including Mount Baker Ski Area and Mount Baker Ski Resort.

The economy of Whatcom County is largely based on agriculture, forestry, and fishing. The county is also home to a number of technology companies, including Microsoft, Amazon, and Boeing. The county is also home to a number of educational institutions, including Western Washington University, Bellingham Technical College, and Whatcom Community College.

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