Jakob Klatzkin, Yakov/Jakub Klaczkin (Hebrew: יעקב קלצקין; Russian: Яков Клачкин; October 3, 1882, in Biaroza, Grodno Governorate, now Belarus – March 26, 1948, in Vevey, Switzerland) was a Jewish philosopher, publicist, author, and publisher.

Klatzkin received his doctorate from the University of Berne in Switzerland, then returned to Germany to write for Hebrew periodicals and establish Jewish publishing firms.

Klatzkin had a close relationship with Arnold Schoenberg, a Jewish musician who was also active in advancing the need to establish a place of refuge for the Jews in the 1930s.

[1] After the Nazis' rise to power in 1933, Klatzkin fled to Switzerland and earned a living giving lectures on various Jewish subjects.

He argued that the only meaningful goal for Zionism was regaining the land of Israel and normalizing the conditions of Jewish existence.