Kern County is a county in the Southern California region of California. Its largest city is Bakersfield. The county borders Kings County, Tulare County, and Inyo County to the north, San Bernardino County to the east, Los Angeles County to the south, Ventura County to the southwest, and San Luis Obispo County to the west.
The county's economy is heavily linked to agriculture and to petroleum extraction. There is also a strong aviation, space, and military presence, such as Edwards Air Force Base, the China Lake Naval Air Weapons Station, and the Mojave Air and Space Port. It is one of the fastest growing areas in the United States in terms of population growth, and suffers from significant water supply issues and poor air quality.