Isaac Landman (October 24, 1880 – September 4, 1946) was an American Reform rabbi, author and anti-Zionist activist.
In 1911, with the assistance of Jacob Schiff, Julius Rosenwald, and Simon Bamberger, he founded a Jewish farm colony in Utah.
During World War I he was "said to be the first Jewish chaplain in the United States Army to serve on foreign soil".
[1] Landman had also been a prominent opponent of Zionism: when, in 1922, the United States Congress was considering the Lodge–Fish resolution in support of the Balfour Declaration, Landman and Rabbi David Philipson had presented the Reform movement's (then) anti-Zionist position to the House Committee on Foreign Affairs.
With his brother, physician Michael Lewis Landman, he authored the play A Man of Honor.