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San Diego Regional East County Chamber of Commerce Find Member Directory Join Become a Member CONNECT Events Programs The Voice of the Business Community for San Diego County. The San Diego Regional East County Chamber of Commerce is the respected voice of and advocate for improving business opportunitiespublic policy and business relationships throughout San Diego County. About Us Advocating for You and Your Business For over 100 years the Chamber has been the respected voice for business in East County. Membership offers you the ability to make connections to some of our communitys most dynamic people that represent over 600 businesses.