Jacumba Hot Springs (/həˈkuːmbə/ hə-KOOM-bə) is a census-designated place in the Mountain Empire area of southeastern San Diego County, California. It was treated as a census-designated place (CDP) for the first time in the 2010 census, and had a population of 561. The ZIP code is 91934 and the town lies within area code 619. Its elevation is 2,829 feet (862 m) above mean sea level (AMSL). On Feb.