High Quality Content by WIKIPEDIA articles! Borrego Springs is a census-designated place (CDP) in San Diego County, California. The population was 3,429 at the 2010 census, up from 2,535 at the 2000 census. Many residents are seasonal while others remain year round. Borrego Springs is completely surrounded by a state park (Anza-Borrego State Park, the largest of California`s State Parks).