Oregon - Criteria: A (event)
| Jacksonville-to-Fort Klamath Military Wagon Road |
| Jacobs-Wilson House |
| Jantzen Knitting Mills Company Building |
| J.C. Penney Building |
| Jefferson Substation |
| Jensen Investment Company Building |
| Jewish Shelter Home |
| J. K. Gill Company Building |
| John Day Compound, Supervisor's Warehouse |
| Johnson, Charles E., Building |
| Johnson Hall |
| Jones Cash Store |
| Journal Building |
| Julian Hotel |
| Kam Wah Chung Company Building |
| Keck, H.C., House-Mt. Olivet Parsonage |
| Kennedy, John D., Elementary School |
| Kenton Commercial Historic District |
| Kenton Hotel |
| King, Isaac, House and Barn |
| Kirkland Lookout Ground House (Guard Station) |
| Klamath Falls City Hall |
| Kohlhagen Building |
| Kress Building |
| Ladd's Addition Historic District |
| La Grande Commercial Historic District |
| Lake Creek Bridge |
| Lake of the Woods Ranger Station-Work Center |
| Lake Oswego Odd Fellows Hall |
| Lamonta Compound-Prineville Supervisor's Warehouse |
| Lane County Clerk's Building |
| Larson, Peter and Maria, House |
| Larwood Bridge |
| Lauer Apartment Building |
| Laurelhurst Historic District |
| Laurelhurst Park |
| Lebanon Pioneer Cemetery |
| Lebanon Southern Pacific Railroad Depot |
| Leutgert, Henry C., Building |
| Lewisburg Hall and Warehouse Company Building |
| Lewis, William H., Model House |
| Liberty Theater |
| Lick Creek Guard Station |
| Lightship WAL-604, COLUMBIA |
| Lindquist Apartment House |
| Linkville Pioneer Cemetery |
| Linnea Hall |
| Lipman-Wolfe and Company Building |
| Lithia Park |
| Lombard Automobile Buildings |
| Lone Fir Cemetery |
| Lost Creek Bridge |
| Lostine Pharmacy |
| Louise Home Hospital and Residence Hall |
| Lowell Bridge |
| Lowell Grange |
| Macksburg Lutheran Church |
| Macrum, Isaac, House |
| Mallory Hotel |
| Mangels, William F., Four-Row Carousel |
| Mann, Anna Lewis, Old People's Home |
| Manning-Kamna Farm |
| Marion County Housing Committee Demonstration House |
| Marion Forks Guard Station |
| Marquam Manor |
| Marshfield Elks Temple |
| Marshfield I.O.O.F. Cemetery |
| Masonic Temple |
| Masters, Andrew Jackson and Sarah Jane, House |
| Maupin Section Foreman's House |
| McDonald, Malcolm, House |
| McDonald Theater Building |
| McKee Bridge |
| McKenzie Fish Hatchery, Old |
| McKenzie Highway Historic District |
| McLoughlin Promenade |
| McMinnville Downtown Historic District |
| McMorran and Washburne Department Store Building |
| Medford Carnegie Library |
| Medford Downtown Historic District |
| Medford IOOF Cemetery |
| Medford Southern Pacific Railroad Passenger Depot |
| Medical Arts Building |
| Meier and Frank Building |
| Meier & Frank Warehouse |
| Menefee, L. B., House |
| Methodist Episcopal Church South |
| Methodist Episcopal Church South |
| Methodist Episcopal Parsonage |
| Miller's Mountain House |
| Milo Academy Bridge |
| Minthorn Hall |
| Mitchell Recreation Area |
| Mizpah Presbytarian Church of East Portland |
| Mohawk Building |
| Monastery of the Precious Blood |
| Monroe State Bank Building |
| Montgomery Ward & Company |
| Moody, Malcolm A., House |
| Morrison Bridge |
Data from United States Park Service and Wikidata
