Cynthia A. Henderson (born Cynthia Ann Kowalski, April 21, 1949, Acushnet, Massachusetts, U.S.A.), American teacher, bookkeeper, entrepreneur, and haiku poet and organizer. Member of the Santa Fe Haiku Study Group, the Haiku Society of America, and Haiku Canada. Served on the organizing committee for Haiku North America 2017. Lives in Santa Fe, N.M.