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 Cornelius Hotel is a historic hotel building in downtown Portland, Oregon, United States that is listed on the National Register of Historic Places. It was designed by John V. Bennes's firm, and constructed in 1907–08. It ceased to be used as a hotel by the 1950s. A fire in 1985 left the top three floors of the structure uninhabitable. By the early 1990s, the building had been vacated, and it remained vacant for more than two decades. In 2016–2018, it was joined to the adjacent Woodlark Building, extensively renovated, and converted into a hotel. The Woodlark Hotel opened on December 15, 2018.
The Wonder Ballroom is a music venue located in northeast Portland, Oregon. Prior to opening in 2004, the building was occupied by the Ancient Order of Hibernians, the Catholic Youth Organization, the Portland Boxing School, the American Legion organization, and a community center eventually known as the Collins Center. In 2005, the building was listed on the National Register of Historic Places as the Hibernian Hall for its "historic and architectural significance".
The Elks Temple, also known as the Princeton Building and as the west wing of the Sentinel hotel, is a former Elks building and historic hotel building in downtown Portland, Oregon, United States. Built in 1923, it is one of two NRHP-listed buildings that make up the Sentinel Hotel, the other being the 1909-built Seward Hotel. The Seward was renamed the Governor Hotel in 1932, and in 1992 it was joined with the former Elks building, and thereafter the building became the west wing of a two-building hotel, an expanded Governor Hotel. The hotel's main entrance was moved to this building from the east building in 2004. The Governor Hotel was renamed the Sentinel Hotel in 2014. Use of the building as an Elks temple lasted less than a decade, ending in 1932.
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.
The former Mizpah Presbyterian Church is a building in southeast Portland, Oregon.
The Frigidaire Building or Templeton Building is a building in southeast Portland, Oregon listed on the National Register of Historic Places. The building was designed by William C. Knighton and Leslie D. Howell and completed in 1929 for O.E. (Oscar) Heintz and occupied by Frigidaire until 1934. When prohibition was repealed in 1933, the Oregon Liquor Control Commission was created through Oregon's Knox Bill. OLCC occupied the building once Frigidare left. Later it was occupied by R.J. Templeton, an auto parts distributor.
The Oregon Portland Cement Building is a building in southeast Portland, Oregon, United States listed on the National Register of Historic Places.
The Osborn Hotel 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 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 Henry Sensel Building is a building in southeast Portland, Oregon, listed on the National Register of Historic Places.
The First Unitarian Church of Portland is a church building located in downtown Portland, Oregon, listed on the National Register of Historic Places. Located on S.W. 12th Avenue at Salmon Street, it was constructed and opened in 1924.
Povey Brothers Studio, also known as Povey Brothers Art Glass Works or Povey Bros. Glass Co., was an American producer of stained glass windows based in Portland, Oregon. The studio was active from 1888 to 1928. As the largest and best known art glass company in Oregon, it produced windows for homes, churches, and commercial buildings throughout the West. When the firm was founded in 1888, it was the only creative window firm in Portland, then a city of 42,000 residents.
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 First Congregational Church of Oregon City, also known as Atkinson Memorial Congregational Church, is a historic building located at 6th and John Adams Sts. in Oregon City, Oregon. The congregation was formed in 1844 as a non-denominational Protestant congregation. In 1892 they affiliated with the Congregational Christian Church from the local Congregational Society that had been formed in 1849 from the 1844 congregation. The present building was constructed in the Gothic Revival style in 1925 after the previous building had been destroyed in a fire in 1923. It was listed on the National Register of Historic Places in 1982.
Oaks Pioneer Church, formerly known as St. John's Episcopal Church, in southeast Portland in the U.S. state of Oregon is a non-denominational one-story chapel listed on the National Register of Historic Places. Built in 1851, it was added to the register in 1974. It is the oldest intact church building in Oregon.
The Alphabet Historic District, is a historic district in the Northwest District of Portland, Oregon which was listed on the National Register of Historic Places in 2000. It is 156.9 acres (63.5 ha) in area and includes 478 contributing buildings. It is roughly bounded by NW Lovejoy St., NW Marshall St., NW 17th Ave., W. Burnside St., and NW 24th Ave.
