Go back to directory. Add to Address Book. Waterloo Chamber of Commerce Waterloo Chamber of Commerce P.O. Box 1, 118 E. Third St. Waterloo IL 62298 work Work Phone: 618-939-5300work Work Fax: 618-939-1805workfax Work Email: chamber@htc.netINTERNET Website: http://www.enjoywaterloo.com Biographical Info 9:00 A.M. – 3:00 P.M. Monday – Thursday Categories: Civic Club/Organization Updated 2 years ago.