Membership in CWC allows members access to other branches’ meetings and events. Further, a member of one branch may purchase a “dual membership” to two branches by joining the second branch at $25 per year.
Northern California branches:
| Branch name | meets in… |
| Berkeley | Oakland |
| Central Coast | Monterey |
| Fremont Area Writers | Fremont |
| Marin | Corte Madera |
| Mount Diablo | Pleasant Hill |
| Napa Valley Writers | Napa |
| North State Writers | Chico |
| Redwood | Santa Rosa |
| Sacramento | Sacramento |
| San Francisco / Peninsula | Belmont |
| South Bay | Sunnyvale |
| Tri-Valley | Pleasanton |
| Writers of The Mendocino Coast | Mendocino |
Southern California branches:
| Branch name | meets in… |
| Coastal Dunes | Nipomo |
| East Sierra | Ridgecrest |
| High Desert | Apple Valley |
| Inland Empire | Montclair |
| Orange County | Orange |
| Long Beach | Long Beach |
| San Fernando Valley | Sherman Oaks |
| Writers of Kern | Bakersfield |