Oregon - Area of significance: Commerce
| Lane County Farmers' Union Cooperative Wholesalers' Association Building |
| Latourette, Charles David, House |
| Latourette, DeWitt Clinton, House |
| Laughlin, Lee, House |
| Lewisburg Hall and Warehouse Company Building |
| Lipman-Wolfe and Company Building |
| Log Cabin Inn Ensemble |
| Londershausen House |
| Look-Out on Cape Foulweather, The |
| Lueddemann, Max and Ollie, House |
| Lundburg, George H., House |
| Lynch, Matthew J. and Florence, House and Garden |
| Lytle, Robert F., House |
| Macrum, Isaac, House |
| Malarkey, Herbert and Elizabeth, House |
| Mallory Hotel |
| Malmgren Garage |
| Manning, S. A., Building |
| Markle-Pittock House |
| Marshall-Wells Company Warehouse No. 2 |
| Marshfield Elks Temple |
| Marshfield Hotel |
| Marshfield Sun Printing Plant |
| Matlock-Brownfield Building |
| McCann, Thomas, House |
| McCully, David, House |
| McDonald Theater Building |
| McMinnville Downtown Historic District |
| McMorran and Washburne Department Store Building |
| McNamar Building |
| Medford Downtown Historic District |
| Meier and Frank Building |
| Meier and Frank Delivery Depot |
| Meier & Frank Warehouse |
| Merritt, John W., House and Store |
| Milarkey Building |
| Miller, Fred O., House |
| Miller's Mountain House |
| Mill-Pine Neighborhood Historic District |
| Mills, Lewis H., House |
| Minto, John and Douglas, Houses |
| Moeck, George F., House |
| Mohawk Building |
| Monroe State Bank Building |
| Montgomery Ward & Company |
| Morrow County Courthouse |
| Moyer, John M., House |
| Mt. Hood Hotel Annex |
| Multnomah Hotel |
| Nasburg-Lockhart House |
| Nerdrum-Conrad House |
| Nerdrum, Hjalte, House |
| New Cliff House |
| New Heathman Hotel |
| New Houston Hotel |
| New Logus Block |
| New Redmond Hotel |
| Nichols House |
| Nininger, Amos and Vera, House |
| Northwest Fence and Wire Works |
| Oakland Historic District |
| O'Kane Building |
| O.K. Theatre |
| Old First National Bank of Prineville, and Foster and Hyde Store |
| Old Stone House |
| Olds, Wortman and King Department Store |
| Olsson, Captain Bror W., House |
| Oregon-American Lumber Company Mill Office |
| Oregon Bank Building |
| Oregon City Masonic Lodge |
| Oregon Electric Railway Passenger Station |
| Oregon State Bank Building |
| Oregon Trail, Barlow Road Segment |
| Oregon Trail: La Grande to Hilgard Segment |
| Oregon Trunk Passenger and Freight Station |
| Otis Elevator Company Building |
| Owyhee Grocery |
| Pacific Cooperative Poultry Producers Egg-Taking Station |
| Packard Service Building |
| Palace Hotel |
| Parrott, Moses, House |
| Paulson, John E. and Christina, House |
| Paulus, Christopher, Building |
| Peerless Rooms Building |
| Pernot, Dr. Henry S., House |
| Perozzi, Domingo, House |
| Phoenix Pharmacy |
| Piggott, Charles, House |
| Pittock Mansion |
| Point Comfort Lodge |
| Polk County Bank |
| Portland and Southwestern Railroad Tunnel |
| Portland New Chinatown-Japantown Historic District |
| Portland Skidmore/Old Town Historic District |
| Portland Thirteenth Avenue Historic District |
| Portland Van and Storage Building |
| Port-Manning House |
| Post and King Saloon |
| Powers, Ira F., Building |
| Putnam-Neff House |
Data from United States Park Service and Wikidata
