Anatol Mühlstein (22 August 1889 – 29 September 1957) was a Polish diplomat and writer.

[2] Born to a Jewish family in Warsaw, he studied in Geneva, Paris, and Brussels.

[4] He was active in the Belgian resistance, and was one of three founders of an underground journal first published in 1918, Le Flambeau alongside the historian Henri Grégoire and Oscar Grosjean.

Mühlstein joined the Polish diplomatic service in 1919, assigned to Brussels.

During that time, he was a member of the Polish delegation to the Locarno Conference and League of Nations assemblies.