*Honorary doctorate of the Christian Albrechts University of Kiel (1983) as well as of the University of Ljubljana (1990)
*Award of the Göttingen Academy of Sciences and Humanities (1963)
*Alfred Stock Award of the German Chemical Society (1974)
*Henri Moissan Medal of the Société chimique de France (1986)
*Jozef Stefan Medal of the Jozef Stefan Institute in Ljubljana (1988)
*Otto Hahn Award for Chemistry and Physics (1989) as the first representative of inorganic chemistry
*Lavoisier Medal (along with Derek Barton) of the Société chimique de France (1995)
Furthermore, Hoppe has been a member of several scientific societies and academies as well as of the German National Academy of Sciences Leopoldina in Halle and of the Bavarian Academy of Sciences and Austrian Academy of Sciences.