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Welcome to Chatham Events Join Today Find a Member Member Login The mission of the Chatham Chamber of Commerce is to be an advocate for our local businesses to support our membership with value added services and to contribute to the success of our community. Become a Member The Chamber puts our partners in the spotlight. From sharing your news to promoting your events to posting special offers the Chamber helps our partners amplify their message to the business community and visitors to our area. Explore the Area Chatham is located on the elbow of Cape Cod surrounded on three sides by water.