Jakob Lestschinsky (also ''Jacob Lestschinsky'', ''Yankev Leshtshinski'', ''Yankev Leshchinski'', לשצ'ינסקי, יעקב; August 26, 1876 – March 22, 1966) was a Ukrainian-born Jewish statistician and sociologist. He specialized in Jewish demography and economic history, and wrote in Yiddish, German, and English. During the February Revolution in Russia he helped found the United Jewish Socialist Party and served on the editorial board of ''Naye Tsayt'', its official journal. During the war he lived in New York City, and worked with the Institute of Jewish Affairs of the World Jewish Congress.
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