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 Otto W. and Ida L. Nelson House is a house located in southeast Portland, Oregon, listed on the National Register of Historic Places.
The Annand–Loomis House is a house located in southwest Portland, Oregon, listed on the National Register of Historic Places. It has also been known as the John Annand House and as the Lee B. Loomis House.
The Ball–Ehrman 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 Alice Henderson Strong House is a house located in southwest Portland, Oregon listed on the National Register of Historic Places.
The George Earle Chamberlain House is a house located in northeast Portland, Oregon, listed on the National Register of Historic Places (NRHP). The house was built in 1893 and its original owner was Frank M. Warren. In 1904, the house was acquired by George Earle Chamberlain, who was then in his first term as Governor of Oregon, and Chamberlain owned and occupied the house until his death in 1928. Soon after buying the house, Chamberlain remodeled the first and second floors, both interior and exterior. Since the time of Chamberlain's ownership, modifications to the building have been few.
