Henry Howland Crapo (KRAY-poh;[1] August 12, 1932 – September 3, 2019) was an American-Canadian mathematician who worked in algebraic combinatorics.

Over the course of his career, he held positions at several universities and research institutes in Canada and France.

[2][3] He received his Ph.D. in 1964 under the supervision of Gian-Carlo Rota and Kenneth Hoffman, with thesis On the theory of combinatorial independence.

[5][6] He subsequently held academic positions at the University of Waterloo, Université de Montréal, INRIA Rocquencourt, and École des Hautes Études en Sciences Sociales.

At the University of Waterloo he donated a collection of rare books on the history of dance and ballet,[17] as well as a copy of the Porcellino sculpture of Florence; the latter shoulder-high bronze sculpture of a wild boar later became a mascot for the University of Waterloo Faculty of Arts.