Hermann Otto Erich Sasse (17 July 1895 – 9 August 1976) was a German Lutheran pastor, theologian, and author.

He was ordained on 13 June 1920 in St Matthew's Church in Berlin and thereafter served several parishes in Brandenburg, He took the licentiate in theology in 1923.

He spent a year (1925-1926) as an exchange student at Hartford Theological Seminary in the United States, where he earned a master's degree.

[1] In the early 1930s, he emerged as a vocal critic of the Nazi Party and Germany's new chancellor, Adolf Hitler, as part of the Confessing Church Movement led by Martin Niemöller.

While he did not sign the 1934 Barmen Declaration, he did author, with Dietrich Bonhoeffer and others, the first draft of the lesser known Bethel Confession of 1933, which addressed the treatment of Jews.

A noted conservative voice in Lutheranism, his theological research focused on Scripture as Word of God and on the Eucharist.