Hans Schack (28 October 1608 – 27 February 1676) was a member of the north German noble family Schack, who after many years in French service, entered the Danish service, made major contributions during the war with Sweden, and loyally supported Frederick III when he overthrew the Danish constitution.

In 1651 Schack retired from the French service to his estates in Saxe-Lauenburg, where he remained until 1656, when he became military commandant of Hamburg.

In order to satisfy Schack's demand for a permanent position, he was in 1658 appointed lieutenant-general, colonel of horse and foot, and made a member of the War Council.

He also became naturalized as a Danish nobleman, receiving two estates in life tenancy; Riberhus and Møgeltønder (the later Schackenborg Castle).

In the fall of the same year, Schack led the Danish forces to victory over the Swedes at the battle of Nyborg.