Stupnitsky (Stupnitzky) Shaul (Schaul) Itzhok (1876, Bielsk, Białystok district, Grodno province — 1942) — publicist.

Shaul Stupnitsky received a traditional Jewish religious education. In 1897, he studied at the university in Heidelberg. In 1898, he studied philosophy, history, and Oriental languages in Bern. In 1901, in Warsaw, he joined the Polish socialists. At the 6th Zionist Congress in Basel (1903), he supported the territorialists. After moving to Minsk, he joined the Poalei Zion movement.

His first publication appeared in 1886 in the newspaper “Ha-Melitz.” He also published in the newspapers “Ha-Maggid,” “Ha-Or,” and others. From 1903, he wrote in Yiddish. In the weekly “Di Yidishe Folks-Tsaytung” in Warsaw in 1903, he published the study “Khazars” and a series of articles “What is nationalism.” In Warsaw, his books “State and Nation” (1918) and “Assimilation in Jewish History” (1918) were published.

In 1908–1926, he collaborated with the newspapers “Haint” (Warsaw), “Dos Folk,” “Lubliner Togblat” (Lublin), and “Frigmorgn” (Riga). During the Second World War, in the Warsaw ghetto, he researched the problem of school education. Part of his materials was found in the archive of E. Ringelblum. In the ghetto publication “Gazeta Żydowska,” he published articles on historical topics over a period of two years.