Ya'akov Hazan (Hebrew: יעקב חזן; 4 June 1899 – 22 July 1992) was an Israeli politician and social activist.

He immigrated to Mandatory Palestine in 1923, working in an orchard in Hadera and in drying swamps in the Beit She'an valley.

Along with Meir Yaari, he led HaShomer Hatzair, Kibbutz Artzi and Mapam for decades, characterizing those movements by identification with the Soviet Union and Communism.

Following the Prague Trials he changed his mind and joined forces with Yaari to keep Moshe Sneh, who held on to the pro-Soviet stand, out of the party.

He chose not to serve in national positions that would make him have to abandon his ideological, partisan, parliamentary and educational occupations, that had influence outside of Mapam as well.