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Pages Members Categories Quicklinks Events Welcome to the Costa Mesa Chamber of Commerce Proudly serving our business community for over 100years The Mission of the Costa Mesa Chamber of Commerce is to be the leading proponent for the interests of local business. This includes the prosperity of its individual members the vitality of its marketplace and the quality of its community life. We are dedicated to providing your business with the vital resources marketing and networking tools needed to thrive in our region. Your membership provides numerous benefits and keeps you on top of important everchanging issues and trends in our local marketplace and beyond.