Kurt Köster, also spelled Koetser (born 14 November 1912 in Wiesbaden; died 17 July 1986 in Munich), was a German librarian and historian.
Köster worked as a primary school teacher from 1932 to 1939 then studied history, historical auxiliary sciences, German and musicology in Frankfurt and Munich.
As a part-time job, he compiled an inventory of the local medieval bells on behalf of the Evangelical Church in Hesse and Nassau.
[3] From 1959 to 1975 he headed this institution (as the successor to Hanns Wilhelm Eppelsheimer), which during his tenure was expanded into an important German-language library and a national bibliographic center.
[7] With editions and his own monograph, he promoted the work of the Dutch cultural historian Johan Huizinga in Germany and made a name for himself as a Gutenberg researcher.
He also worked on regional history with several publications in the association for Nassau antiquity and historical research (Verein für Nassauische Altertumskunde und Geschichtsforschung), becoming a member in 1941.