Ignacy Hugo Stanisław Matuszewski (born September 10, 1891, in Warsaw, died on August 3, 1946, in New York City) was a Polish politician, publicist, diplomat, Minister of Finance of the Second Polish Republic, colonel, infantry officer and intelligence agent of the Polish Army, member of the International Olympic Committee. A strong supporter of Józef Piłsudski, he was counted among the "Colonels" and co-founded the Józef Piłsudski Institute of America.