In Munich on 26 May 1939, Stülpnagel married Dagmar Reinhard (born 25 January 1919), the daughter of Major Hugo Reinhard and Ella Lucke. The marriage ended in divorce in Freiburg on 25 March 1947. Reinhard later married the factory owner Horst Gütermann (born 19 June 1922 in Freiburg).
