Rancho San Diego, California landscape and open-space maintenance. Rancho San Diego is served by the Cajon Valley Union School District and the Grossmont Union High School District. Steele Canyon High School and Valhalla High School are the primary schools in this location. Rancho San Diego is also home to the Cuyamaca College Coyotes. Rancho San Diego, California Rancho San Diego is a census-designated place (CDP) in San Diego County, California. The population was 21,208 at the 2010 census, up from 20,155 at the 2000 census. The area was developed as subdivisions beginning in the 1970s. Rancho San Diego is located at (32.765985, -116.921477). According
History of San Diego San Diego State University (SDSU) is the largest and oldest higher education facility in San Diego County. It was founded in 1897 as San Diego Normal School, a state school for the preparation of teachers, located on Park Avenue in University Heights. In 1931 it moved to a larger location on Aztec Mesa, overlooking Mission Valley, at what was then the eastern edge of San Diego. In 1935 it expanded its offerings beyond teacher education and became San Diego State College. In 1970 it became San Diego State University, part of the California State University system. SDSU has grown to