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GIS / Mapping

Welcome to the updated Lake County Geographical Information System (GIS) Portal. Please take some time to look around. Our site now includes both locally hosted applications as well as links to applications running on ESRI’s new GIS site, arcgis.com where you can browse existing maps or build your own custom maps. 

New Maps for iOS

This new parcel lookup/viewer application will work on desktop as well as most mobile devices, including iOS.  It runs in your browser, no Flash required. Check out Maps for iOS.

Please keep in mind that this is a brand new application – both to Lake County and to the developer, ESRI.   It is a work-in-progress.  Currently, custom options are very limited, but as ESRI makes improvements on their end, we will update the application on ours.

  • Click the “APN” tool at the top to search for an 8-digit parcel number
  • Tap on any parcel to identify it
  • “Print” tool creates a PDF that you can open in a new browser window.

Recent Changes

  • Zoning Ordinance link added to Zoning layer July 3, 2014
  • Parcel Labels layer added April 29, 2013. v3.1
  • Enhanced "search" & parcel selection tools added april 4, 2013. See Viewer Help for instructions. v3.1
  • Enhanced "Draw & Measure" tool added April 1, 2013. Save, send and load graphics as a text file. v3.1
  • Bookmark tool added April 1, 2013 v3.1
  • Viewer updated to version 3.1 March 11, 2013


For FTP access to download GIS data, send email to Lon.Sharp@lakecountyca.gov.

Google Earth

KML/KMZ files which can be imported into Google Earth are available for download from the FTP site.

Any comments can be sent to Lon.Sharp@lakecountyca.gov or webmaster@lakecountyca.gov. Remember, if we do not hear from you – the user – then we cannot make the site work the way you want it to.   Also remember that there are limitations to the software; not every change request we receive can be incorporated into the site.