Yaakov Yitzhaki (Russian: Ицхаки, Я́ков Ицхоко́вич; Hebrew: יעקב יצחקי; September 1, 1846 – June 11, 1917) was a rabbi, scholar, religious Zionist and founder of the settlement of Be'er Ya'akov.

[1] In 1868, when he was 22 years old, with the consent of the elders of the community, his father appointed him chief rabbi and religious judge of Derbent.

[2] In the 1880s, he was appointed by the tsarist government as crown rabbi of the Mountain Jews of Southern Dagestan and Azerbaijan.

[1] Yitzhaki contacted Jewish communities in Poland, Romania, Lithuania, Turkey, Bukhara, Persia, Kurdistan and Palestine.

He was a member of the "Higher Education" organization, which wrote and published articles in the Historical Jewish Press: "Hamagid", "Recommended", "Lebanon", "The Collector", and other popular magazines.