State Chambers of Commerce are the leading voice of business in our states.

The Council of State Chambers (COSC) is the national organization for state chamber CEOs and their executive leadership. The purpose of COSC is to promote cooperation among state chambers of commerce, strengthen existing state chambers, and promote the extensions of the state chamber of commerce movement throughout the country.

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Member Organizations

Click on a state to visit the state chamber's website. Click here for a full list of members. In addition to the state members listed on the map below, the following national organizations are also members of COSC:

Association of Chamber of Commerce Executives | Council on State Taxation | U.S. Chamber of Commerce

 

History of COSC

The idea of a national association of state chambers of commerce was originally discussed at a roundtable session on November 1, 1923, at Hotel Gibson in Cincinnati, Ohio. Among the states represented at that meeting were Connecticut, Massachusetts, Missouri, Wisconsin, Florida, Oregon, Pennsylvania, Illinois, Iowa, Ohio, Indiana, and the Chamber of Commerce of the United States. The first annual meeting of COSC, then called the National Association of State Chambers of Commerce, was held on October 9, 1924, in Pittsburgh, Pennsylvania.