Lajos Blau (German: Ludwig Blau; 29 April 1861 – 8 March 1936) was a Jewish–Hungarian scholar of philosophy and Oriental studies, professor of Jewish studies, and publicist born at Putnok, in the Kingdom of Hungary.
In 1887, Blau became a teacher of Talmudic literature at the Rabbinical Seminary of Budapest; in 1888 he served there as a substitute professor, and in 1889 as professor of the Hebrew Bible, the languages of Hebrew and Aramaic, and the Talmud.
In 1902, Blau became president of the folklore section of the Jewish–Hungarian Literary Society, editor of the Magyar Zsido Szemle, and a contributor to the Jewish Encyclopedia (1906).
Blau's academic publications have dealt chiefly with the following topics: Blau also published Der Concursus Vitiorum nach Talmudischem Recht, Budapest, 1887; and Die Erwählung Israel's (in Hungarian), ib.
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