National Register of Historic Places listings in Ada County, Idaho
National Register of Historic Places listings in Ada County, Idaho
This is a complete list of Ada County properties and districts on the National Register of Historic Places. Many listings include latitude and longitude so you can see them on a map. Ada County has 167 listings, including 1 National Historic Landmark. Listings are updated regularly as new places are added nationwide. This list is current through January 2, 2026, per the National Park Service. Coordinates can be downloaded.
This page was last edited on 2 February 2026, at 07:34 (CET).