Baroque Sinfonia of Sonoma County, California: A small chamber orchestra of the approximate size and instrumentation of Haydn's day. Background, concert schedule.
Chamber Orchestra of the South Bay: Near Los Angeles, CA: includes calendar, reviews, history, subscription information.
New Century Chamber Orchestra: Includes schedule, and ticket information.
Orchestra Sonoma: Includes photos and ticket information.
San Diego Chamber Orchestra (SDCO): Includes ticket information.
San Francisco Chamber Orchestra: Northern California's oldest professional chamber orchestra. History, personnel, news.
San Jose Chamber Orchestra: Reviews, concert schedule.
South Bay Chamber Music Society of Southern California: Performs monthly concerts in the LA area. Schedule, history, members.
South Orange County Chamber Orchestra: pre-professional training orchestra: includes ticket reservations, concert calendar, audition information, and library of audio files.
The Jeffersonians: Santa Monica chamber orchestra and comedy group.