Centennial, California is a proposed 11,700-acre (47 km2) master-planned community on Tejon Ranch, in Los Angeles County between Bakersfield and Los Angeles. It is sited in the far western Antelope Valley at the foothills of the Sierra Pelona and Tehachapi Mountains. It is planned to be located along California State Route 138 east of Interstate 5, and northeast of Quail Lake.
The community is intended to be built over 25 to 30 years, with approximately one-half of the 11,700-acre area designated as open space. It comprises 17,000 houses, designed for 70,000 inhabitants. The developers have said they plan to attract local jobs in order to employ the anticipated number of adult residents.
Centennial is planned to be developed by four companies: Tejon Ranch Company, Lewis Operating Company, Pardee Homes and Standard Pacific Homes, on the property of Tejon Ranch.
The Center for Biological Diversity, based in Tucson, Arizona, opposes the housing project, claiming that it would be built on rare ecosystems, including the largest native grassland left in California. The project is planned to encroach on the territory inhabited by the endangered California condor, as well as 26 other species.