Aloha (not ) is a census-designated place and an unincorporated community in Washington County, Oregon, United States. By road it is west of downtown Portland. As of the 2010 Census, the population was 49,425.
On January 9, 1912, the community received its name with the opening of a post office named Aloha; the area had previously been known as Wheeler Crossing. According to Oregon Geographic Names, the origin of the name Aloha is disputed. Some sources say it was named by Robert Caples, a railroad worker, but it is unknown why the name was chosen. In 1983 Joseph H. Buck claimed that his uncle, the first postmaster, Julius Buck, named the office "Aloah" after a small 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 Ah-LO-wa rather than Ah-LO-ha.
The community attempted to incorporate in 1984, but the regional boundary commission halted the effort after determining the community could not provide the needed municipal services of a city. The reason for this attempt to incorporate was a notice, sent by the Beaverton Postmaster to all Aloha residents. This notice stated that since Aloha was not listed in the official zip code directory, all "Aloha" addresses had to be changed to "Beaverton", and that after 1 year, any mail still addressed to "Aloha" would be returned as undeliverable.
In 2012, a public library was opened in space within a strip mall shopping center on Farmington Road at Kinnaman Road (anchored by Bales Thriftway). Named the Aloha Community Library, it was established by the non-profit Aloha Community Library Association and is staffed by volunteers. At the time of its opening, it had about 4,500 books.