Paul Saladin Leonhardt (13 November 1877 – 14 December 1934) was a German chess master.

A player with a low profile and not many tournament wins, Leonhardt has been largely forgotten by the history books.

Tarrasch, Tartakower, Nimzowitsch, Maróczy and Réti all succumbed to his fierce attacking style between 1903 and 1920.

In major tournaments he was first at Hilversum 1903, Hamburg 1905, and Copenhagen 1907 (ahead of Maróczy and Schlechter), making him Nordic Champion; third, behind Rubinstein and Maróczy, at Carlsbad 1907; second, behind Milan Vidmar, at Gothenburg 1909 (7th Nordic-ch); second, behind Rudolf Spielmann, at Stockholm 1909; and second, behind Carl Ahues, at Duisburg (DSB Congress) 1929.

[3] As an expert analyst of the openings, he wrote a monograph on the Ruy Lopez (Zur Spanische Partie – 1913).