Robert Johann Maria König (11 April 1885, Linz – 9 July 1979, Munich) was an Austrian mathematician.

In 1911 he earned his Habilitation qualification at the University of Leipzig with thesis Konforme Abbildung der Oberfläche einer räumlichen Ecke.

[1] In 1927 König was appointed Ordentlicher Professor and institute director at the University of Jena, where he replaced Paul Koebe.

Because both Schmidt and König were opposed to Nazism, they were involved in disputes over the appointment of new, politically reliable mathematicians at the University of Jena in the Nazi era.

His doctoral students include Helmut Röhrl and Karl-Heinrich Weise,[2] with whom he wrote in 1951 a book on geodesy and cartography Mathematische Grundlagen der höheren Geodäsie und Kartographie.