Jacumba Valley is a valley in San Diego County, California. Its head is at 32°37′00″N 116°10′07″W / 32.61667°N 116.16861°WCarrizo Creek has its source in Jacumba Valley, 1.2 miles north of the California-Mexico State boundary, at 32°38′09″N 116°07′05″W / 32.63583°N 116.11806°W at an elevation of 3,210 feet, on the west side of the divide between Jacumba Valley and the valley of upper Boulder Creek. Carrizo Creek flows west then north northwest through Jacumba Valley to its mouth at the head of Carrizo Gorge.
Coordinates: 32°39′18″N 116°11′25″W / 32.65500°N 116.19028°W