Holy City is an unincorporated community in Santa Clara County, California. Once a Utopian community, it is arguably now a ghost town. The town is located in the Santa Cruz Mountains, off State Route 17 on Old Santa Cruz Highway, at 37°09′25″N 121°58′44″W / 37.1568904°N 121.9788476°WCoordinates: 37°09′25″N 121°58′44″W / 37.1568904°N 121.9788476°W (37.1568904, -121.9788476). It is part of the Lexington Hills census designated place. Its ZIP code is 95026, and its area codes are 408 and 669.
Holy City was founded in 1919 by cult-leader William E. Riker and about thirty of his followers. Calling his ideology "The Perfect Christian Divine Way", Riker preached celibacy, temperance, white supremacy, and segregation of the races and sexes.