Aloha (, not /əˈloʊhɑː/) is a census-designated place and unincorporated community in Washington County, Oregon, United States. By road it is 10.9 miles (17.5 km) west of downtown Portland. As of the 2020 Census, the population was 53,828. Fire support and EMS services are provided through Tualatin Valley Fire and Rescue. and Metro West Ambulance.

On January 9, 1912, the community received its name when the initiation of a declare office named Aloha; the area had since been known as Wheeler Crossing. According to Oregon Geographic Names, the extraction of the broadcast Aloha is disputed. Some sources say it was named by Robert Caples, a railroad worker, but it is mysterious why the say was chosen. In 1983 Joseph H. Buck claimed that his uncle, the first postmaster, Julius Buck, named the office “Aloah” after a little resort on Lake Winnebago in Wisconsin. Supposedly the last two letters were transposed by the Post Office during the application process. The local pronunciation, however, has remained rather than /əˈloʊhɑː/.

The community attempted to incorporate in 1984, but the regional boundary commission halted the effort after determining the community could not give the needed municipal services of a city.

In 2012, a public library was opened in a song within a strip mall shopping center upon Farmington Road at Kinnaman Road (previously anchored by Bales Thriftway until its recess in 2020). Named the Aloha Community Library, it was established by the non-profit Aloha Community Library Association and is staffed by volunteers. At the era of its opening, it had more or less 4,500 books.