Spring Valley is a census-designated place (CDP) in San Diego County, California. The population was 28,205 at the 2010 census.

The name "Spring Valley" may also refer to a wider area including the Spring Valley CDP, La Presa and part of the neighborhood of Casa de Oro (which extends into La Mesa). There are claims that the Greater Spring Valley area has over 100,000 residents  although this claims large areas that are actually unincorporated parts of La Mesa and El Cajon.