Dennis Chamber of Commerce Share: Non-Profit Visit Website 242 Swan River Road West Dennis, MA 02670 (508) 398-3568 (508) 760-5212 (fax) Facebook About Map About Our MissionTo provide support for our members to prosper and thrive; to promote the growth and sustainability of our businesses; and to connect our members to each other and the community. What's Nearby? Distance: 5 10 15 20 25 50 mi.