The Association of California Symphony Orchestras (ACSO) was founded in 1969 at Asilomar as a means of sharing information and resources for California Orchestras and it is the largest state orchestra association in the United States. Over the past 40 years, ACSO membership has grown to include over 400 individuals and organizations from California and other states. Its 21-member Board of Directors is representative of organizations with different budget sizes, from different geographic areas, and consists of trustees, music directors, musicians, volunteers and staff.

Membership is open to orchestras, choruses and classical music presenters of all sizes, symphony leagues and guilds, youth orchestras, festivals, artists managements, businesses, and individuals associated with orchestras or wishing to access its services.

Current members of ACSO with Wikipedia pages include:

Orchestras & Choruses: Bay Area Rainbow Symphony, California Symphony

California Symphony

The California Symphony is an American orchestra based in Walnut Creek, California, in the East Bay region of the San Francisco Bay Area. It is notable for being the only American orchestra that performs at least one work by an American composer on every one of its programs.The orchestra was...

, California Youth Symphony

California Youth Symphony

California Youth Symphony is a San Francisco Bay Area symphony orchestra for young musicians of high school age and younger. It was founded in 1952 by Aaron Sten and in 1963 became the first United States youth orchestra to tour abroad, performing twelve concerts in Japan. Since then, the...

, Fremont Symphony Orchestra

Fremont Symphony Orchestra

The Fremont Symphony Orchestra was established in Fremont, California as a community orchestra in 1964 and was called the Fremont-Newark Philharmonic Society.-History:...

, Livermore-Amador Symphony

Livermore-Amador Symphony

The Livermore-Amador Symphony is a local symphony orchestra composed of musicians from the Tri-Valley in the San Francisco Bay Area.The Symphony was established in 1963....

, Los Angeles Chamber Orchestra

Los Angeles Chamber Orchestra

The Los Angeles Chamber Orchestra is a 40-member American chamber orchestra based in Los Angeles, California, considered by music critic Jim Svejda as "America's finest chamber orchestra".-History:...

, Los Angeles Children's Chorus, Los Angeles Philharmonic

Los Angeles Philharmonic

The Los Angeles Philharmonic is an American orchestra based in Los Angeles, California, United States. It has a regular season of concerts from October through June at the Walt Disney Concert Hall, and a summer season at the Hollywood Bowl from July through September...

, Music Academy of the West

Music Academy of the West

The Music Academy of the West is a music conservatory located in Montecito, California near Santa Barbara, California. Every year, it hosts a summer music festival for the community highlighted by concerts and workshops directed by famous composers, conductors, and artists.A yearly maximum of 135...

, New Century Chamber Orchestra

New Century Chamber Orchestra

The New Century Chamber Orchestra was founded in 1992 by cellist, Miriam Perkoff, and violist, Wieslaw Pogorzelski. The goal of the founders was to present classical music in a fresh and unique way in the San Francisco Bay Area. The music director chooses the programs and guides the artistic...

, New West Symphony

New West Symphony

The New West Symphony is one of several regional professional symphony orchestras in the Los Angeles metropolitan area. It was founded in 1995 to succeed two orchestras that ceased operations...

, North State Symphony

North State Symphony

The North State Symphony is an orchestra which is an amalgamation of the former Chico and Redding Symphonies in Northern California. Its conductor and musical director is Kyle Wiley Pickett....

, Oakland East Bay Symphony

Oakland East Bay Symphony

The Oakland East Bay Symphony is a leading orchestra based in Oakland, California. The current music director and conductor is Michael Morgan, who has held the position since September 1990. The Paramount Theatre has been the home of the Symphony since the 1995. Bryan Nies has been Assistant...

, Ojai Music Festival

Ojai Music Festival

The Ojai Music Festival is an annual classical music festival in the United States. Held in Ojai, California for four days every June, the festival presents music, symposia, and educational programs emphasizing adventurous, eclectic, and challenging music, principally by contemporary composers...

, Orchestra Nova San Diego, Pacific Chorale

Pacific Chorale

Pacific Chorale, founded in 1968, is a professional chorus performing in Costa Mesa, California at the Renée and Henry Segerstom Concert Hall at Segerstrom Center for the Arts .- Artistic Director :...

, Pacific Symphony

Pacific Symphony

The Pacific Symphony is a symphony orchestra located in Orange County, California. The orchestra performs at the Renée and Henry Segerstom Concert Hall, part of the Orange County Performing Arts Center in Costa Mesa, California...

, Peninsula Symphony

Peninsula Symphony

The Peninsula Symphony is an American symphony orchestra, based in the San Francisco Peninsula, California. The orchestra consists of over 90 community musicians. In 1995, the Peninsula Symphony was featured in a PBS broadcast....

, Philharmonia Baroque Orchestra

Philharmonia Baroque Orchestra

Philharmonia Baroque Orchestra is an orchestra based in San Francisco, which is dedicated to historically informed performance of Baroque, Classical and early Romantic music on original instruments. The Philharmonia Baroque Orchestra was founded in 1981 by harpsichordist, teacher and early music...

, Sacramento Philharmonic Orchestra

Sacramento Philharmonic Orchestra

The Sacramento Philharmonic is a symphony orchestra in the Sacramento region, established in 1997 after the disbandment of the Sacramento Symphony that same year...

, Sacramento Youth Symphony

Sacramento Youth Symphony

The Sacramento Youth Symphony was founded in 1956 as a 55-member youth orchestra, associated with the Sacramento Symphony Association. The Sacramento Symphony has since ceased operations and the Sacramento Youth Symphony became incorporated as an independent, 501 3 non-profit organization in 1991...

, San Diego Symphony

San Diego Symphony

The San Diego Symphony is an American symphony orchestra, based in San Diego, California. On 6 December 1910, it gave its first concert as the San Diego Civic Orchestra.Currently, the Symphony performs over 100 concerts each season...

, San Francisco Conservatory of Music

San Francisco Conservatory of Music

San Francisco Conservatory of Music, formerly the California Conservatory of Music, founded in 1917, is a music school, with an enrollment of about 400 students. It was launched by Ada Clement and Lillian Hodgehead in the remodeled home of Lillian's parents on Sacramento Street. It was called the...

, San Francisco Symphony

San Francisco Symphony

The San Francisco Symphony is an orchestra based in San Francisco, California. Since 1980, the orchestra has performed at the Louise M. Davies Symphony Hall. The San Francisco Symphony Youth Orchestra and the San Francisco Symphony Chorus are part of the organization...

, San Jose Youth Symphony

San Jose Youth Symphony

The San Jose Youth Symphony is a non-profit youth orchestra located in San Jose, California.SJYS was founded in the year 1951. It was originally part of the San Jose Symphony as the San Jose Symphony Youth Orchestra...

, Santa Barbara Symphony Orchestra

Santa Barbara Symphony Orchestra

The Santa Barbara Symphony is a full-time professional symphony orchestra and register 5013 nonprofit organization based in Santa Barbara, California.The orchestra was founded in 1953...

, Santa Cruz County Symphony

Santa Cruz County Symphony

Founded in 1958, the Santa Cruz County Symphony has been under the guidance of John Larry Granger, Music Director since 1991. The Santa Cruz County Symphony performs at the Santa Cruz Civic Auditorium and the Mello Center for the Performing Arts in Watsonville, California. Five regular-season...

, Southwest Chamber Music

Southwest Chamber Music

Southwest Chamber Music is an ensemble of 15 musicians based in Los Angeles County, California. The organization was founded in 1987 by Artistic Director Jeff von der Schmidt and Executive Director Jan Karlin...

, Stockton Symphony

Stockton Symphony

The Stockton Symphony Association is an American orchestra based in Stockton, California. It was founded in 1926 by Manlio Silva and is the third oldest orchestra in California.Since 1995 Peter Jaffe has been music director and conductor.-Concert halls:...

Businesses: ASCAP, League of American Orchestras

League of American Orchestras

The League of American Orchestras, known until Fall 2007 as the American Symphony Orchestra League , is an association of U.S. and Canadian orchestras. Over 950 orchestras are members, including youth, community, and professional orchestras....

, Opus 3 Artists

Opus 3 artists

Opus 3 Artists is an independent artists management firm with offices in New York City and Los Angeles, and represents several classical artists, as well as artists in the non-classical genres, such as jazz, world music, theater, dance, and special attractions. Formerly the classical music division...

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