Spring Valley is a census-designated place (CDP) in the East County region of San Diego County, California. La Presa is also popularly considered to be a part of Spring Valley. Extended definitions of Spring Valley may also include the Casa de Oro neighbourhood to the north, which belongs to the Casa de Oro-Mount Helix CDP. Locations in both La Presa and Casa de Oro use Spring Valley addresses. Spring Valley is named for the natural spring located there. It was long the home of the Kumeyaay people, who called it Neti or Meti. Spanish conquerors drove off the natives and used the area for cattle, calling it El aguaje de San Jorge (St. George's Spring).
Spring Valley has a population of over 28,205 people.