Citrus College is a public community college in Glendora, California. The Citrus Community College District, which supports the institution, includes the communities of Azusa, Claremont, Duarte, Glendora and Monrovia. Founded in 1915 by educator , Citrus College is the oldest community college in Los Angeles County, California, and the fifth oldest in the state of California. Until 1961, the school was operated by the Citrus Union High School District and served the local area as both a high school and a junior college.