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.
Willamette Mission State Park is a state park in the U.S. state of Oregon, located about four miles (6 km) north of Keizer adjacent to the Wheatland Ferry and east of the Willamette River. It includes Willamette Station Site, Methodist Mission in Oregon, which is listed by the National Register of Historic Places.
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 Markle–Pittock House is a historic house located in southwest Portland, Oregon listed on the National Register of Historic Places.
