Ignacy Hugo Stanisław Matuszewski (10 September [O.S. 29 August] 1891 – 3 August 1946) 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.