Karl-Otto Stöhr (born 9 May 1942) is a German mathematician working on algebraic geometry.
He is a titular researcher at the IMPA.Stöhr is a titular member of the Brazilian Academy of Sciences and has received Brazil's National Order of Scientific Merit.
He is also a member of the European Academy of Sciences.He obtained his Ph.D.
at the University of Bonn in 1967 under the guidance of Wolfgang Krull and Jacques Tits.Arnaldo Garcia was a student of his.