National Register of Historic Places listings in Union County, Oregon

This list presents the full set of buildings, structures, objects, sites, or districts designated on the National Register of Historic Places in Union County, Oregon, and offers brief descriptive information about each of them. The National Register recognizes places of national, state, or local historic significance across the United States. Out of over 90,000 National Register sites nationwide, Oregon is home to over 2,000, and 19 of those are found in Union County.