Altamont is an unincorporated community and census-designated place (CDP) located in Klamath County, Oregon, in the United States. It is situated southeast of the city of Klamath Falls.
As of the 2020 Census, Altamont had a population of 20,233. While the community sits outside the official city limits of Klamath Falls, all mailing addresses within Altamont are designated as Klamath Falls addresses.