Count Stefan Adam Zamoyski (17 February 1904 – 27 October 1976) was a Polish nobleman, landowner and a magnate.

Lt.-Col. Count Stefan Zamoyski served as an aide-de-camp to Polish Prime Minister-in-exile Wladislaw Sikorski in London.

In December 1940, Lt.-Col. Zamoyski wrote to the head of RAF Bomber Command, requesting that the German concentration camp Auschwitz be bombed to allow the Polish political prisoners there at the time to escape; the RAF declined to act.

Following World War II, Count Zamoyski remained in Britain.

On 26 June 1929 in Gołuchów, he married Princess Elżbieta Czartoryska (1905-1989), second daughter of Prince Adam Ludwik Czartoryski and his wife, Countess Maria Ludwika Krasińska.