Anatol Mühlstein (22 August 1889 – 29 September 1957) was a Polish diplomat and writer.
He served as Chargé d'affaires for the Polish embassy in Brussels in 1927, and as Minister Plenipotentiary for the Polish embassy in Paris 1930–36.Born to a Jewish family in Warsaw, he studied in Geneva, Paris, and Brussels.
In 1932, Mühlstein married Diane de Rothschild, daughter of French banker Robert de Rothschild.
The couple had three daughters: Nathalie, Anka, and Cecile.
After the German invasion of France, Mühlstein moved to the United States.