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 Gaston–Strong House is a house located in southwest Portland, Oregon listed on the National Register of Historic Places. An early resident was Joseph P. Gaston.
The Heryford Brothers Building is a historic commercial building in Lakeview, Oregon, United States. It was built in 1913 by William P. Heryford, a local rancher and businessman. The building has changed hands several times over the years, but it has remained in continuous use since it was constructed. Today, the Heryford Building is an active commercial structure for a number of small businesses. Because of its importance to local history, the Heryford Building is listed on the National Register of Historic Places.
