Castaic, California, is an unincorporated community and census-designated place in Los Angeles County, California. Located approximately 40 miles northwest of the downtown Los Angeles Civic Center, about 10 miles north of Santa Clarita.

The community has a ZIP Code of 91384 and area code of 661. This quiet mainly residential community is best known currently for it’s proximity to Castaic Lake.

Castaic Lake is the largest state water project reservoir in Southern California, and contains over 11,200 total acres of parkland and open space habitat.  Castaic Lake is a favorite outdoor destination for many in the Santa Clarita Valley for boating, fishing, swimming, camping and all water sports.

Castaic also has a Sports Complex which hosts a variety of events and programs for all community residents.