Our Communities Please use the following County and City links to search for information on our local communities. Contra Costa Antioch Brentwood Clayton Concord Crockett Danville Discovery Bay Hercules Lafayette Martinez Moraga Oakley Orinda Pinole Pittsburg Pleasant Hill San Ramon Walnut Creek Alameda Berkeley Dublin Oakland Pleasanton Solano Benicia Fairfield Vacaville Vallejo Napa American Canyon