About The Web GIS

To download data or maps, please visit our Maps & GIS Data page.

Online Mapping Applications enable viewing of Geographic Information Systems (GIS) Mapping Data covering all of Humboldt County. Key datasets include

  • Aerial Photography
  • Highways and Roads
  • Land Use
  • Parcels
  • Streams
  • USGS Topo Quads
  • Zoning

Datasets have been compiled from various sources including State and Federal Agencies.  Up-to-date Parcels and Roads data have been provided by City of Eureka GIS, City of Arcata GIS, and Humboldt County Planning. Digital Aerial Photography provided by City of Eureka GIS (2007) and USDA FSA Aerial Photography Field Office: County image mosaic for Humboldt, CA (NAIP 2005).

All Web GIS applications display map services with basic layers, functionality, and search options. Basic functionality includes map zooming and panning, identify, measurement, layer control,  and map printing.  Search by address or parcel number is available in all applications.  Other search functions are also available depending on the application.

While parcel boundaries and maps are available for all parcels in Humboldt County including incorporated areas, this system only displays land use and zoning designations for parcels in the unincorporated areas of Humboldt County, not parcels in the cities of Arcata, Blue Lake, Eureka, Fortuna, Ferndale, Rio Dell, or Trinidad. Contact each city for General Plan Land Use and Zoning Designations for city parcels.


The Humboldt County Planning and Building Department makes no guarantee of the quality or completeness of this data. It has not been fully reviewed for accuracy and is intended to be used for planning purposes only. The department assumes no liability or responsibility in the use of this data. While every effort has been made to assure the accuracy of this information, it should be understood that it does not have the force and effect of law, rule, or regulation. In the event of any difference or error, the law will take precedence.

Please note the accuracy of GIS map data varies from location to location in the county. This GIS system is useful for planning purposes but should not be relied upon to determine property, zoning or general plan designation boundaries or be used in any way for project design. All GIS data should be verified before it is materially relied upon for property or project planning. In urban areas the GIS map data maybe inaccurate by as much as 50 feet in any direction. In rural areas the map data may be inaccurate by as much as 400 feet in any direction.


Feedback and comments are welcome and can be submitted through our online form.