Ada County Assessor’s GIS data is available for free download. Owner names and mailing addresses are not included to comply with the Idaho Public Records Act. Idaho Code 74-120, the Idaho Public Records Act prohibits distribution or sale, for use as a mailing list, any list of persons and their addresses and/or phone numbers without first securing the permission of everyone on the list. The statute is available here: https://legislature.idaho.gov/statutesrules/idstat/title74/t74ch1/sect74-120/
- Subdivisions & Surveys This data is now available free, please see more information on how to view and obtain Subs and Surveys on our Online Documents page.
- Unrecorded Land Records (View Online Documents)
Includes scanned copies of various land records – right of way plats, right of way books, Boise interurban railroads, Union Pacific railroads, drainage districts, New York Canal, revision pages, patent books, herd district map.
- Tract Books (View Online Documents)
Includes scanned copies of tract indexes used from mid-1970s until late 1999 (when we made the switch to the digital Property Tax System).
- GIS Data
Includes many countywide shapefiles such as parcels, streets, subdivision boundaries, and much more data we maintain available below: