Valencia is a neighborhood in Santa Clarita located within Los Angeles County, California. It is one of the four unincorporated communities that merged to create the city of Santa Clarita in 1987. It is situated in the western part of Santa Clarita, stretching from Lyons Avenue to the south to north of Copper Hill Drive, and from Interstate 5 east to Bouquet Canyon and Seco Canyon Roads. Valencia was founded as a master-planned community with the first development, Old Orchard I, built on Lyons Avenue behind Old Orchard Elementary School.

Santa Clarita is a city in northwestern Los Angeles County in the U.S. state of California. With a 2020 census population of 228,673, it is the third-most populous city in Los Angeles County, the 17th-most populous in California, and the 103rd-most populous city in the United States. It is located about 30 miles (48 km) northwest of downtown Los Angeles, and occupies 70.75 square miles (183.2 km2) of land in the Santa Clarita Valley, along the Santa Clara River. It is a classic example of a U.S. edge city, satellite city, or boomburb.