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
University City, San Diego each other. University City's neighbors include: The wildlife in Rose Canyon has over 99 species of birds including the California gnatcatcher and California least tern which are considered endangered and listed federally as threatened species. The flora of the Rose Canyon is known for its vernal pools. The pools are located on the east end of the canyon adjacent to the Marine Corps Air Station Miramar (MCAS Miramar). Endemic endangered species have included the Orcutt's brodiaea ("Brodiaea orcuttii"), San Diego button celery ("Eryngium aristulatum parishii"), San Diego golden star ("Muilla clevelandii"), spreading navarretia ("Navarretia fossalis"), prostrate navarretia ("Navarretia prostrata"), California