Avraham-Haim Shag (Hebrew: אברהם-חיים שאג, 17 July 1883 – 6 December 1958) was an Israeli politician who served as a member of the Assembly of Representatives and the Knesset.

Born Avraham-Haim Zwebner in Jerusalem in the Ottoman Empire, Shag was educated at the Torat Haim yeshiva.

He later headed a yeshiva in Jerusalem, and was chairman of the city's religious council in 1936.

He was amongst the founders of Kfar Saba, and also aided the foundation of the Bayit VeGan, Geula and Romema neighborhoods of Jerusalem.

In addition, he helped establish the Mizrachi movement in Mandate Palestine, and was a member of its bureau in Jerusalem between 1919 and 1921.