Castaic (/kəˈsteɪ.ɪk/ i) (Chumash: Kaštiq; Spanish: Castéc) is an unincorporated community in the northwestern part of Los Angeles County, California, United States. As of the 2010 census it had a population of 19,015. For statistical purposes the Census Bureau has defined Castaic as a census-designated place (CDP).
Zip Codes in Castaic, CA that we also serve: 91384 91310