Contra Costa County Library is a large public library that is part of Contra Costa County, California.  There are 25 community library locations serving specific cities or communities in the County with a wide range of collections for library users of all ages. These locations are Antioch, Bay Point, Brentwood, Clayton, Concord, Crockett, Danville, El Cerrito, El Sobrante, Hercules, Kensington, Lafayette, Martinez, Moraga, Oakley, Orinda, Pinole, Pittsburg, Pleasant Hill, Rodeo, San Pablo, San Ramon & Dougherty Station, and Walnut Creek Downtown & Ygnacio Valley.