Agua Dulce is an unincorporated community and census-designated place (CDP) in Los Angeles County, California, United States. It lies at an elevation of 2,526 feet (770 m), northeast of Santa Clarita. The community had a population of 3,451 at the 2020 census and covers a geographic area of about 23 square miles (59 km2). Agua Dulce is on the Pacific Crest Trail. The ZIP code is 91390, and the area code is 661.