North Tustin is an unincorporated community in Orange County, California. The population was 25,718 at the 2020 census, up from 24,917 in 2010. For statistical purposes, the United States Census Bureau has defined North Tustin as a census-designated place (CDP). It is both the largest CDP and largest unincorporated community in Orange County. The CDP's name was changed from Tustin Foothills in 2005. Located outside the city limits of Tustin, North Tustin has 92705 and 92780 ZIP Codes.
Geography
According to the United States Census Bureau, the CDP has a total area of , all of it land.
North Tustin is bordered by the city of Tustin to the south, east, and west, and by the city of Orange to the north.
Communities
Within North Tustin are the distinct unincorporated communities of Cowan Heights, East Tustin, Lemon Heights, North Tustin, Panorama Heights, and Red Hill. While there is no local government authority, some social and community services are provided by The Foothill Communities Association (FCA), a nonprofit corporation begun in the 1960s to preserve the living environment in those communities. FCA also advocates for or against some development projects within the North Tustin area depending on the impact on the community.