South Portland is a sextant of

Portland, Oregon Portland ( ) is the List of cities in Oregon, most populous city in the U.S. state of Oregon, located in the Pacific Northwest region. Situated close to northwest Oregon at the confluence of the Willamette River, Willamette and Columbia River, ...

and the complement to North Portland, a group of contiguous neighborhoods delimited by geographical boundaries. The region is bounded on the east by the

Willamette River The Willamette River ( ) is a major tributary of the Columbia River, accounting for 12 to 15 percent of the Columbia's flow. The Willamette's main stem is long, lying entirely in northwestern Oregon in the United States. Flowing northward ...

and on the west by Southwest Naito Parkway, Southwest View Point Terrace, and

Tryon Creek State Natural Area The Tryon Creek State Natural Area is a state park located primarily in Portland, in the U.S. state of Oregon. It is the only Oregon state park within a major metropolitan area. The park lies between Boones Ferry Road and Terwilliger Boulevar ...

. South Portland includes approximately 10,000 properties in the Collins View and South Waterfront neighborhoods, as well as portions of the

Lewis and Clark College Lewis & Clark College is a private liberal arts college in Portland, Oregon. It was founded in 1867 and is situated on the historic M. Lloyd Frank Estate in South Portland's Collins View neighborhood. It is composed of three distinct but adja ...

and

Oregon Health & Science University Oregon Health & Science University (OHSU) is a public university, public research university, research university focusing primarily on health sciences with a main campus, including two hospitals, in Portland, Oregon. The institution was founded ...

campuses.

History

Prior to the establishment of this area, the South Portland area was part of the Southwest Portland quadrant. Because the Willamette River curves to the southeast beyond downtown, addresses to the east of Naito Parkway were numbered with a leading zero to differentiate the address from an address to the west on the same east-west street (e.g. 100 SW vs. 0100 SW). However, emergency dispatch systems and mapping software had difficulty with the leading zeroes, making the change necessary. The Portland City Council approved the split of South Portland from Southwest Portland on June 6, 2018. Leading zero addresses in Southwest were given the same number without the leading zero in South (e.g. 0100 SW to 100 S). City officials began installing updated street signs in May 2020, and older signage will be removed in 2025. The

United States Postal Service The United States Postal Service (USPS), also known as the Post Office, U.S. Mail, or simply the Postal Service, is an independent agencies of the United States government, independent agency of the executive branch of the federal governmen ...

will be able to use either address system.

References

2020 establishments in Oregon {{Oregon-stub