When and where was the first World Service Conference (WSC) held? The first World Service Conference was held on April 20-23, 1961 in New York City, NY at the George Washington Hotel. WSO2017-11-09T16:21:57+00:00November 9, 2017| Share This Post, Choose Your Platform! FacebookTwitterEmail Leave A Comment Cancel reply Comment Save my name, email, and website in this browser for the next time I comment. This site uses Akismet to reduce spam. Learn how your comment data is processed.