Rancho San Diego, California 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 to the United States Census Bureau, the CDP has a total area of , all land. The chance of earthquake damage in Rancho San Diego is much lower than California average and is much higher than the national average. The risk of tornado damage in Rancho San Diego is
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