Carl Julius Otto Liebe (24 May 1860 – 21 March 1929) was a Danish jurist who served as Prime Minister of Denmark from 30 March 1920 to 5 April 1920.

Liebe was appointed prime minister after King Christian X had dismissed Carl Theodor Zahle and his cabinet because of dissatisfaction with the amount of land ceded to Denmark in the Schleswig Plebiscite.

This use of power by the king, which was based in the Danish constitution, led to the Easter Crisis of 1920, and Otto Liebe was replaced by Michael Pedersen Friis after 5 days.

[1] Carl Julius Otto Liebe was born in Copenhagen.

He was the son of Anna Sophy Pedersen and Carl Christian Vilhelm Liebe.