North Tustin is an unincorporated community located in Orange County, California, in the United States. It is officially designated as a census-designated place (CDP) for statistical purposes by the United States Census Bureau. The area is situated outside the city limits of Tustin and encompasses the 92705 and 92780 ZIP codes.
The community was formerly known as Tustin Foothills before its name was changed to North Tustin in 2005. It holds the distinction of being the largest CDP and the largest unincorporated community within Orange County. According to the 2020 census, the population of the area was 25,718, reflecting an increase from 24,917 recorded in 2010.