Members of ADCA have gathered annually since 1981, at
what is called the Annual Convention of the Antique Doorknob Collectors
of America. Past conventions have been held in
Massachusetts, California, Connecticut,
Indiana, Illinois, Iowa, Manitoba, Maryland, Michigan, Minnesota,
Missouri, New York, Oregon, Pennsylvania, South Carolina, Texas,
Washington, and Wisconsin. The location is determined by members
volunteering to host the convention in their local area.