Stegmüller was from 1966 on a corresponding member of the Austrian Academy of Sciences and from 1967 on a member of the Bavarian Academy of Sciences and Humanities. 1972 he became a member of the French Institut International de Philosophie, located in Paris. He also was a member of the International Academy of Science, Munich founded in 1980. In 1989 W. Stegmüller was awarded an honorary doctorate from the University of Innsbruck. After his retirement he was elected as honorary president of the Gesellschaft für Analytische Philosophie (Society for Analytical Philosophy).