Henn is a surname. Notable people with the surname include:
Arthur Wilbur Henn, (1890–1959), American ichthyologist
Bernhart Henn (1817–1865), American politician
Carrie Henn (born 1976), Saturn Award-winning former child actress
Christian Henn (born 1964), retired road racing cyclist
Dirk Henn (born 1960), German-style board game designer
Hans Henn (20th century), West German bobsledder
Jürgen Henn (born 1987), Estonian professional footballer
Pablo Henn (born 1982), Argentine rugby player
Percy Henn (1865–1955), clergyman and teacher
Sean Henn (born 1981), Major League Baseball relief pitcher
Sydney Henn (1861–1936), British knight
Thomas Rice Henn (1901–1974), literary critic
