Contra Costa County

1. Richmond
2. El Cerrito
3. Albany (although it’s geographically closer to the northern part of the East Bay, it’s often considered part of the Contra Costa County area in some contexts)

Central Contra Costa County:

1. Berkeley (shares a border with Contra Costa County but is actually in Alameda County)
2. Piedmont (enclave within Oakland, not typically part of Contra Costa County, but geographically close)

Central Contra Costa (continued):

1. San Pablo
2. Pinole
3. Hercules
4. Martinez (county seat of Contra Costa County)
5. Crockett
6. Pleasant Hill
7. Concord
8. Walnut Creek
9. Clayton

Southern Contra Costa County:

1. Lafayette
2. Orinda
3. Moraga
4. Alamo
5. Danville
6. San Ramon
7. Walnut Creek