Chamber of Commerce of the United States of America 1615 H Street, NW Washington, DC 20062-2000 Main Number: 202-659-6000 Customer Service: 1-800-638-6582
The U.S. Chamber of Commerce is the world's largest business federation representing 3 million businesses of all sizes, sectors, and regions, as well as state and local chambers and industry associations. More than 96% of U.S. Chamber members are small businesses with 100 employees or fewer. The Chamber's International Division works in collaboration with approval 112 American Chambers of Commerce operating in 99 countries to expand global engagement. The Chamber also runs the Center for International Private Enterprise (CIPE), a program of the National Endowment for Democracy.