The Sonoma County Philharmonic is a 65-member all-volunteer orchestra that has presented over 100 free and low-cost concerts throughout Sonoma County over the past 25 years. The orchestra is made up of professional-level local musicians who volunteer their time and talents to reach an audience of people in the county who might otherwise not have the opportunity to enjoy an experience so central to our culture and heritage — the thrill of live orchestral music.