Menachem Bader (מנחם בדר, 20 September 1895 – 31 January 1985) was a Labor Zionist activist during the Mandate era, and later a politician who served as a member of the Knesset.
Born in Dukla in Austria-Hungary (today in Poland), Bader's family moved to Germany during his youth. He studied in a Gymnasium, before studying economics at the University of Cologne. In 1920, the family made aliyah to Palestine.
The year after immigrating, Bader became a member of the Haganah planning committee. A member of the Histadrut trade union, and later its Actions Committee, he was amongst the founders of the gar'in which established kibbutz Mizra. He was also a member of Hapoel Hatzair and HaMerkaz HaHakla'i, and in 1930 joined Hashomer Hatzair.
He was amongst the founders of the Solel Boneh construction company and was involved in developing industry in kibbutzim. He also served as a delegate to several Zionist congresses, and was a deputy member of the Zionist Actions C