Vista is a city in San Diego County, California. Vista is a medium-sized city within the San Diego-Carlsbad, CA Metropolitan Area. As of the 2020 Census, Vista had a population of 98,381. Current data estimates a 2023 population of 99,835. Vista's sphere of influence also includes portions of unincorporated San Diego County to the north and east, with a county island in the central west. Located just 7 mi (11 km) inland from the Pacific Ocean, it has a Mediterranean climate.

Captain John Aldridge Frazier was a merchant seaman and farmer who was one of the founders of the city of Carlsbad, California. His discovery of artesian springs with mineral water led to the creation of the Carlsbad Mineral Springs Hotel & Spa.