Klaus Berger (born November 25, 1940 in Hildesheim) is a German academic theologian.
He is known for his study and publications on the New Testament. He had been quoted in several Catholic news sources to the effect that he was Catholic or somehow "both Catholic and Protestant." This idea was rejected by the Roman Catholic Church. But, after a long controversy, he did indeed leave the Evangelische Landeskirche Baden (the Protestant Church of Baden), and became a member once more of the Roman Catholic Church (in the diocese of Hildesheim, Germany).
Berger has two children from his first marriage with Christa Berger. Later he married translation scholar Christiane Nord.