Jacumba (pronounced "ha-COOM-ba") is an unincorporated community in San Diego County, California, United States. The Jacumba census-designated place (CDP) had a population of 660 at the 2000 census. The ZIP code is 91934 and the town lies within area code 619. The National Geographic Names Database cites its elevation as 2,829 feet (862 m) above mean sea level.