Shmuel Merlin (Hebrew: שמואל מרלין; 1910 – 4 October 1994) was a Revisionist Zionist activist, Irgun member and Israeli politician.

Merlin was born in Kishinev in the Russian Empire (now Moldova), where he attended high school and joined the Betar movement.

From 1933 to 1938 he was Chief Secretary of the Executive of the World Union of Revisionist Zionists.

In 1938 he became editor of the Yiddish language Irgun publication in Warsaw, Di Tat.

[1][circular reference] At the break of World War II he made his way to Paris, where he studied social sciences and history at the University of Paris, and from there to the United States, where he was active in creating committees of support for the Irgun and edited the English language weekly Answer for the “Hebrew Committee for the Liberation of the Nation”.