Centennial, California is a proposed 12,323-acre (49.87 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 19,333 houses, including single- and multifamily structures, designed for 76,000 people. The developers have said they plan to attract local jobs in order to employ the anticipated number of adult residents.
The project lies between a point about a mile east of the intersection of Interstate 5 and California Highway 138 eastward past Quail Lake into the western Antelope Valley to about 280th Street West.
The 19.3-square-mile project 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, has opposed the housing project, claiming that it would be built on rare ecosystems, including the largest native grassland left in California. The project is planned on the territory inhabited by the endangered California condor, as well as 26 other species.