Stanisław Arnold (20 December 1895 – 3 November 1973) was a Polish historian, professor of the University of Warsaw.
He was a member of the Polish Academy of Sciences and chief of the Marxist Association of Historians.
He was the son of Jan, director of a mine, and Romana née Bojanowski.
In 1920 he defended his PhD thesis Władztwo biskupie na grodzie wolborskim w wieku XIII under supervision of Marceli Handelsman.
From 1924 to 1928, he was working as a history teacher at [[Stefan Batory 2nd High School (Warsaw)|Stefan Batory 2nd High School] in Warsaw.