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 Eugenia Apartments in southeast Portland in the U.S. state of Oregon is a two-story apartment building listed on the National Register of Historic Places. A Colonial Revival structure built in 1911, it was added to the register in 1989.
The Oriental Apartments in southeast Portland in the U.S. state of Oregon is a two-story multi-family dwelling listed on the National Register of Historic Places. Built in the Tudor Revival style in 1926, it was added to the register in 1992.
The Santa Barbara Apartments is a building complex on Hawthorne Boulevard in southeast Portland, Oregon listed on the National Register of Historic Places.
The Ball–Ehrman House is a house located in southwest Portland, Oregon, listed on the National Register of Historic Places.
The Elm Street Apartments is a building complex located in southwest Portland, Oregon listed on the National Register of Historic Places.
The Envoy Apartment Building is a building located in southwest Portland, Oregon listed on the National Register of Historic Places. The building was originally apartments but was converted into condominiums in 2004.
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 Brown Apartments is a building complex located in downtown Portland, Oregon, listed on the National Register of Historic Places.
The Calumet Hotel, also known as the Esquire Hotel, is a former hotel building located in downtown Portland, Oregon, that is listed on the National Register of Historic Places. The building was changed from a commercial hotel to a residential hotel for low-income residents in the 1930s. At some point, it took the name Esquire Hotel. By the time of its nomination to the National Register, in 1983, it was vacant. The building was renovated in 2008–09 and is now known as "The Esquire" apartments.
The Belle Court Apartments is a four-story building in northwest Portland, Oregon listed on the National Register of Historic Places.
The Bretnor Apartments is a building complex located in northwest Portland, Oregon listed on the National Register of Historic Places.
The Campbell Hotel, located in northwest Portland, Oregon, is a historic former residential hotel that is listed on the National Register of Historic Places (NRHP). It is now an apartment building named the Campbell Court Apartments.
The Regent Apartments, located in northwest Portland, Oregon, are listed on the National Register of Historic Places.
The Trinity Place Apartments, located in northwest Portland, Oregon, is acknowledged by the National Register of Historic Places.
The Del Rey Apartments, located in northeast Portland, Oregon, are listed on the National Register of Historic Places.
The Emerson Apartments, located in northeast Portland, Oregon, are listed on the National Register of Historic Places.
