A few of the more important associations aimed specifically at scholars in the discipline of Communication. For a comprehensive list, check the guide to Associations & Organizations for Communication Studies developed by the American Library Association's Commitee for Electronic Resources in Communication studies.
There are hundreds of organizations out there which explore, analyze, critique and promote issues related to Communication. Just a few are listed below. You can find many more by searching the Gale Directory Library, which includes the comprehensive Encyclopedia of Associations .