Shmuel (Seth) Sackett (Hebrew: שמואל סקט, born 1961 in Middle Village, Queens[1]) is a Religious Zionist leader. He co-founded both the Zo Artzeinu and Manhigut Yehudit ("Jewish Leadership") political movements in Israel.
During the 1990s, Zo Artzeinu opposed the Oslo Accords through civil disobedience. In 1998, Sackett co-founded Manhigut Yehudit with long-time partner Moshe Feiglin.