2010. Humboldt County (Calif.) -- Community Development Services. This polygonal dataset serves as a general guide to City Boundaries within Humboldt County, California as of 2010. Also ncludes Spheres of Influenc...
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2010. Humboldt County Community Development Services - Advance Planning Division. This polygonal dataset shows the boundaries for the 2010 Board of Supervisor Districts in Humboldt County, California. .
2013. Humboldt County Community Development Services. Humboldt County Fire District Boundaries and Response Areas.
2014. Humboldt County Community Development Services -- Advance Planning Division. This polygonal dataset shows the extents of the county boundary for Humboldt County, California.