Menachem Hacohen (Hebrew: מנחם הכהן, born 26 July 1932) is an Israeli rabbi, writer, thinker and former politician.

He headed the Religious Worker faction in the Histadrut trade union, was member of the Knesset for the Alignment between 1974 and 1988, and also served as chief rabbi of the Moshavim Movement and the Histadrut.

Born in Jerusalem during the Mandate era, Hacohen was educated in the Slabodka yeshiva, before being certified as a rabbi.

He began his military service in 1951 in the Nahal brigade, and held the post of chief editor of the Army Rabbi's publications from 1951 until 1955.

Hacohen has also written several books, including The Stones Speak: History and Folklore about the Holy Places Liberated by the IDF (1967), Book of the Life of Man: Weddings (1986), Book of the Life of Man: Birth (1991), The Belief of a Nation (1996) and From Year to Year (1996).