Leib Yaffe (born 1876) (Hebrew: אריה לייב יפה) was a Hebrew poet, journalist and editor of Haaretz newspaper.
Leib Yaffe was born in Grodno, Belarus. He spent his university years in Germany. A life-long champion of the Zionist cause, he immigrated to Palestine in 1920, where he became chief editor of Haaretz.He founded and served as director-general of Keren Hayesod. In 1924, he visited Pinsk to promote the Zionist cause and received a warm welcome from the Jewish community.
In 1942, he was sent on a mission to South America, and in December of that year he traveled toUnited States as an emissary of the Zionist Movement.
On March 11, 1948, he and 12 others were killed by a car bomb in the courtyard of the Jewish Agency building in Jerusalem.
A street is named after him in Jerusalem's Talpiot neighborhood, as well as in Herzliya, Israel.