Agua Dulce (pronunciation) (Spanish for “Sweet Water”) is a census-designated place 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 3,342 at the 2010 census and covers a geographic area of practically 23 square miles (59 km²). Agua Dulce is upon the Pacific Crest Trail. The ZIP code is 91390 (shared as soon as Green Valley and in the distance northern Santa Clarita), and the Place code is 661.

Agua Dulce is located along California State Route 14, halfway together with Santa Clarita and Palmdale, and 45 miles (72 km) north of Los Angeles, in the Sierra Pelona Valley region of Southern California. Vasquez Rocks is located in Agua Dulce. The Pacific Crest Trail, which runs from Mexico to Canada, goes through Agua Dulce.

On June 1, 2021, a shooting occurred at Los Angeles County Fire Department Station 81 in Agua Dulce. Firefighter Jonathan Tatone shot and killed a fellow firefighter and wronged a ember captain.

At the 2010 census Agua Dulce had a population of 3,342. The population density was 146.3 inhabitants per square mile (56.5/km). The racial makeup of Agua Dulce was 2,854 (85.4%) White (75.5% Non-Hispanic White), 59 (1.8%) Black, 24 (0.7%) Native American, 78 (2.3%) Asian, 3 (0.1%) Pacific Islander, 223 (6.7%) from new races, and 101 (3.0%) from two or more races. Hispanic or Latino of any race were 611 people (18.3%).