Region I

• Santa Barbara
• Santa Clarita (Santa Clarita, San Fernando North Valley, Antelope Valley)
• Ventura (Conejo Valley, Pleasant Valley-Ventura, Kern)

Region II

• Los Angeles
• Pasadena

Region III

• Orange County West
• South Bay
• South Bay East (Lakewood-Cerritos, Long Beach, Torrance)

Region IV

• Glendale
• San Fernando Valley (San Fernando East Valley, San Fernando West Valley)
• Westside (Hollywood, Santa Monica Bay, West Los Angeles)

Region V

• North San Diego (North San Diego, Temecula)
• Orange Coast (Irvine, Orange Coast Cities, South Coast)
• San Diego

Region VI/VII (combined)

• Orange (Orange, Orange County North)
• Claremont (Diamond Bar, Pomona Valley, San Gabriel)
• Los Angeles East (Hacienda Heights, Whittier, West San Gabriel Valley)
• Redlands (Redlands, San Bernardino)
• Riverside

Region VIII • Strings

Region IX • Winds & Voice

Region X • Organ

Region XI • Harpsichord