The following list presents the full set of National Register of Historic Places listings in Multnomah County, Oregon. However, please see separate articles for listings in each of Portland's six quadrants.
The Nettie Krouse Fourplex in southeast Portland in the U.S. state of Oregon is a 2.5-story multiple dwelling listed on the National Register of Historic Places. Built in the American Craftsman style in 1910, it was added to the register in 1989.
The International Harvester Company Warehouse is a building in southeast Portland, Oregon listed on the National Register of Historic Places.
The Frigidaire Building or Templeton Building is a building in southeast Portland, Oregon listed on the National Register of Historic Places. The building was designed by William C. Knighton and Leslie D. Howell and completed in 1929 for O.E. (Oscar) Heintz and occupied by Frigidaire until 1934. When prohibition was repealed in 1933, the Oregon Liquor Control Commission was created through Oregon's Knox Bill. OLCC occupied the building once Frigidare left. Later it was occupied by R.J. Templeton, an auto parts distributor.
The New Logus Block is a building complex in southeast Portland, Oregon, listed on the National Register of Historic Places.
The Rachel Louise Hawthorne House is a house in southeast Portland, Oregon listed on the National Register of Historic Places.
The Elizabeth B. Gowanlock House is a house in southeast Portland, Oregon listed on the National Register of Historic Places.
The Alice Druhot House is located in southwest Portland, Oregon listed on the National Register of Historic Places. It is located in the Goose Hollow neighborhood.
The Durham–Jacobs House is a house located in southwest Portland, Oregon listed on the National Register of Historic Places.
The Electric Building is a building located in downtown Portland, Oregon, listed on the National Register of Historic Places. It was built in 1910 for the Portland Railway, Light and Power Company, to serve as the company's headquarters and to house its main electricity generating station.
The Elm Street Apartments is a building complex located in southwest Portland, Oregon listed on the National Register of Historic Places.
The Caroline W. and M. Louise Flanders House is a house located in southwest Portland, Oregon listed on the National Register of Historic Places.
The Giesy–Failing House is a house located southwest Portland, Oregon listed on the National Register of Historic Places. It is located in the Southwest Hills neighborhood.
The Neighbors of Woodcraft Building, also known as the Tiffany Center, is a building located in southwest Portland, Oregon, listed on the National Register of Historic Places. Construction of the building was commissioned by the Neighbors of Woodcraft (NOW), a non-profit fraternal benefit society based in Oregon since 1905 and operating in several western states, for use as a national headquarters and clubhouse. The building was completed in May 1929 and dedicated in June. In 1993, NOW sold the building and moved out of its remaining office space there. The building was added to the National Register in February 1996.
The Portland Police Block, located in downtown Portland, Oregon, and at the southern edge of the Old Town historic district, is listed on the National Register of Historic Places. The building served as the headquarters of the Portland Police Bureau until 1984.
The Roosevelt Hotel was a hotel located in downtown Portland, Oregon at 1005 SW Park. It was built in 1924 and is listed on the National Register of Historic Places. In 2000–2001 the building was converted to condominiums.
The Honeyman Hardware Company Building is a historic commercial building located at 832 NW Hoyt Street in Northwest Portland, Oregon. It was completed in 1912 and was listed on the National Register of Historic Places on December 15, 1989.
