Karl Sanne (26 January 1869 – 29 June 1945) was a Norwegian farmer and politician of the Conservative Party who served as Minister of Education and Church Affairs from 1923 to 1924.

He took part in the farm and banking work of his foster father in Vanse, before eventually taking over the farm Bryne and serving as treasurer at Vanse Sogns Sparebank in 1897.

Sanne was a member of the Supervisory Board of Svelvik and Strøms Sparebank from 1927 to 1937.

In 1923, he was appointed Minister of Education and Church Affairs following Ivar B. Sælen’s death.

He held this post until July 1924, when Prime Minister Abraham Berge resigned.