Mckinleyville, CA is a city located in Humboldt County, California and has a land area of 53.77 square miles (139.26 km2). The water area for the city is 0.36 square miles or 0.93 km2. There is one unique zip code in Mckinleyville, California and it is 95519. The area code(s) for Mckinleyville is 707.
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