Coast Guard Sector/Air Station Humboldt Bay is a United States Coast Guard Air Station and Sector, with command and primary assets located at the Arcata-Eureka Airport in McKinleyville, California, 16 miles north of Eureka in Humboldt County.

Most cases are dramatic and lifesaving in nature due to the rough seas and generally poor weather conditions prevalent on the northern California coast.

Secondary missions include aerial support for Aids to Navigation, Maritime Law enforcement, and Marine Environmental Protection along 250 miles of rugged coastline from the Mendocino-Sonoma County line north to the California-Oregon border.

Even with a cutter based at Eureka's docks and another at Crescent City, command in the modern era was split as air support was directed from San Francisco.

However, on June 24, 1977, as the culmination of a multi-year initiative by local residents and groups to gain a year-round aviation search and rescue (SAR) facility for Northern California, then Coast Guard Air Station Arcata was commissioned, complete with new assets, at the Arcata-Eureka Airport in McKinleyville, California.