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
California State University San Marcos California State University San Marcos California State University San Marcos (CSUSM or Cal State San Marcos) is a public comprehensive university in San Marcos, California, United States, and one of the 23 campuses of the California State University system. San Marcos is a suburban city in the North County area of San Diego County. It was founded in 1989 as the 20th CSU campus. The first class was admitted in 1990. CSU San Marcos offers 62 different Bachelor's degrees, 15 master's degrees, an Ed.D. program, and 13 teaching credentials. The university has four colleges: the College of Business Administration; the