Henryk Floyar-Rajchman (December 7, 1893 – March 22, 1951) was a Polish statesman and a founding member of the Józef Piłsudski Institute of America for Research in the Modern History of Poland created in New York City in July 1943.

In 1917, when the Legions refused to swear allegiance to the Central Powers, he joined the secret Polish Military Organization.

In 1923 Floyar-Rajchman began education at the Higher War School in Warsaw, from which he obtained a diplomatic major rank.

He arrived in New York City on June 19, 1941, and was employed as an industrial consultant by the National Light & Metal Craft Company in the following year.

Both companies were owned by Ignacy Nurkiewicz, with whom Floyar-Rajchman worked to establish the General Assembly of the National Committee of Americans of Polish Extraction (KNAPP) and the Józef Piłsudski Institute of America.