Area code 661 is a California telephone area code that covers the majority of Kern County, as well as part of Los Angeles County, Santa Barbara County, and Tulare County. It was split from area code 805 on February 13, 1999. Principal cities in the 661 area code are Bakersfield, Palmdale, Santa Clarita, and Lancaster. Places in the 661 area code Kern County Arvin Bakersfield Bear Valley Springs Buttonwillow Caliente Delano Edwards Air Force Base Famoso Fellows Frazier Park Golden Hills Grapevine Havilah Keene Lake of the Woods Lamont Lebec Lost Hills Maricopa McFarland McKittrick Mettler Mojave North Edwards Oildale Pine Mountain Club Rosamond Rosedale Shafter South Taft Stallion Springs Taft Taft Heights Tehachapi Tupman Valley Acres Walker Basin Wasco Weedpatch Wheeler Ridge Los Angeles County Acton Agua Dulce Antelope Acres Castaic Del Sur Desert View Highlands Gorman Green Valley Juniper Hills Lake Hughes Lake Los Angeles Lancaster Leona Valley Littlerock Llano Neenach Palmdale Pearblossom Quartz Hill Santa Clarita Stevenson Ranch Valencia Val Verde Valyermo Santa Barbara County Cuyama New Cuyama Tulare County Allensworth Earlimart Posey See also List of California area codes List of NANP area codes North American Numbering Plan References External links 661 Kern County, California Los Angeles County, California Santa Barbara County, California Tulare County, California Mojave Desert San Joaquin Valley Bakersfield, California Lancaster, California Palmdale, California Santa Clarita, California 661