Henn is a both a surname and an Estonian masculine given name.

Notable people with the name include:

• Henn-Ants Kurg (1898–1943), Estonian military colonel and diplomat
• Henn Pärn (born 1941), Estonian politician
• Henn Põlluaas (born 1960), Estonian politician
• Henn Põlluste (born 1952), Estonian wrestler and wrestling coach
• Henn Saari (1924–1999), Estonian linguist
• Henn Treial (1905–1941), Estonian journalist, editor and politician

• Alexander Henn, German anthropologist
• Arthur Henn (disambiguation)
• Bernhart Henn (1817–1865), American politician
• Carrie Henn (born 1976), actress
• Christian Henn (born 1964), road racing cyclist
• Dirk Henn (born 1960), German-style board game designer
• Guy Henn (1909–1998), Australian doctor and politician
• Hans Henn (20th century), West German bobsledder
• Harry George Henn (1919–1994), American law professor
• Henry Henn (1858–1931), Church of England bishop
• Jaco Henn (born 1974), South African sport shooter
• John Henn (1941–2020), American volleyball player
• Jürgen Henn (born 1987), Estonian football manager
• Luca Henn (born 1997), German racing cyclist
• Mark Henn (born 1958), Disney animator
• Matthias Henn (born 1985), German footballer
• Pablo Henn (born 1982), Argentine rugby player
• Percy Henn (1865–1955), clergyman and teacher
• Preston Henn (1931–2017), American entrepreneur
• Sean Henn (born 1981), baseball player
• Steve Henn (born 1976), American poet and editor
• Sydney Henn (1861–1936), British knight
• Thomas Rice Henn (1901–1974), literary critic
• William Henn (c.1720–1796), Irish judge

• Hehn and Hen (disambiguation)
• Henn., taxonomic author abbreviation of Paul Christoph Hennings (1841–1908), German mycologist and herbarium curator
• Henn-Collins
• Henna (disambiguation)