| Capital: | Martinez |
|---|---|
| Origen y Formación del condado: | Original |
| Población: | 1,094,205 habitantes |
| Área: | 720 sq mi |
| Localización del condado dentro de California: |
|
Localidades en Contra Costa, California
- Acalanes Ridge
- Alamo
- Alhambra Valley
- Antioch
- Atchison Village Richmond
- Bayview Montalvin
- Bay Point
- Bethel Island
- Blackhawk
- Blackhawk Camino Tassajara
- Brentwood
- Brickyard Cove Richmond
- Byron
- Camino Tassajara
- Canyon
- Castle Hill
- Clayton
- Clyde
- Concord
- Contra Costa Centre
- Crockett
- Danville
- Diablo
- Discovery Bay
- East Richmond Heights
- El Cerrito
- El Sobrante
- Hercules
- Kensington
- Knightsen
- Lafayette
- Marina Bay Richmond
- Martinez
- Moraga
- Mountain View Contra Costa County
- Norris Canyon
- North Gate
- North Richmond
- Oakley
- Orinda
- Pacheco
- Pinole
- Pittsburg
- Pleasant Hill
- Point Richmond Richmond
- Port Chicago
- Port Costa
- Reliez Valley
- Richmond
- Rodeo
- Rollingwood
- Saint Marys College Of
- San Pablo
- San Ramon
- Selby
- Shell Ridge
- Silverado Canyon
- Tara Hills
- Tormey
- Vine Hill
- Waldon
- Walnut Creek