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 St. Johns Post Office is a historic building located in the Cathedral Park neighborhood near St. Johns, Portland, Oregon, United States.
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.
West's Block is a building in southeast Portland, Oregon listed on the National Register of Historic Places.
The Olympic Cereal Mill, formerly known as B&O Warehouse, is a building complex in southeast Portland, Oregon, listed on the National Register of Historic Places. The building is currently a creative space.
The Oregon Portland Cement Building is a building in southeast Portland, Oregon listed on the National Register of Historic Places.
The John Deere Plow Company Building is a building 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 Charles Piper Building is a building in southeast Portland, Oregon listed on the National Register of Historic Places.
The Martin Parelius Fourplex is a building in southeast Portland, Oregon listed on the National Register of Historic Places.
The Santa Barbara Apartments is a building complex on Hawthorne Boulevard in southeast Portland, Oregon listed on the National Register of Historic Places.
The Henry Sensel Building is a building in southeast Portland, Oregon, listed on the National Register of Historic Places.
The Clarence H. Jones House is a house located in southeast Portland, Oregon listed on the National Register of Historic Places.
The James S. Polhemus House is a house located in southeast Portland, Oregon, listed on the National Register of Historic Places.
The Jessie M. Raymond House is a house located in southeast Portland, Oregon, listed on the National Register of Historic Places.
The Hancock Street Fourplex is a complex located in northeast Portland, Oregon listed on the National Register of Historic Places.
The George P. Lent Investment Properties, also known as Firehouse Row, in southeast Portland in the U.S. state of Oregon, consists of a group of five similar 1.5-story, single-family houses listed on the National Register of Historic Places. Built in 1893, the group was added to the register in 1989. The Queen Anne style houses are next to one another at the corner of Southeast 7th Avenue and Southeast Harrison Streets. They are commonly referred to as Firehouse Row because firemen from the adjacent Portland Fire Station No. 23 sometimes lived in them.
The Frederick Turner Fourplex is a historic apartment building located in Portland, Oregon, United States. Built in 1928 in the Tudor Revival style, it is an outstanding example of Portland architect Roscoe D. Hemenway's (1889–1959) work in period revival styles during the 1920s through the 1950s. Hemenway was well known for designing well-appointed single-family homes, and the Turner Fourplex is one of very few multi-unit residences he produced.
