Henry Allen may refer to:

Politics

• Henry Allen (Wisconsin politician), Wisconsin State Assemblyman
• Henry C. Allen (1844–1925), American politician and farmer from Virginia
• Henry C. Allen (Virginia politician) (1838–1889)
• Henry C. Allen (New Jersey politician) (1872–1942), American Republican Party politician in New Jersey
• Henry Dixon Allen (1854–1924), U.S. Representative from Kentucky
• Henry Edgarton Allen (1864–1924), Canadian politician and merchant
• Henry Justin Allen (1868–1950), Governor of Kansas
• Henry Allen (Mayor of Gloucester) (1815–1893), mayor of Gloucester, England, 1873
• Henry George Allen (1815–1908), British Member of Parliament for Pembroke, 1880–1885, and Pembroke and Haverfordwest, 1885–1886
• Henry Watkins Allen (1820–1866), American soldier and politician

Other

• Henry Allen (Colorado settler) (ca. 1815–1871), American miner and leader of early Denver, Colorado
• Henry Allen (equestrian) (1889–1971), American Olympic equestrian
• Henry Allen (footballer) (1898–1976), English footballer
• Henry Allen (journalist) (born 1941), American journalist, poet, musician and critic
• Henry Wilson Allen (1912–1991), American author and screenwriter
• Henry Allen (theologian) (1748–1784), Christian hymnwriter
• Red Allen (Henry Allen, 1908–1967), jazz trumpeter
• Henry Robinson Allen (1809–1876), Irish-born London-based opera singer
• Henry Tureman Allen (1859–1930), Alaskan explorer and military leader
• Henry Kaleialoha Allen (born 1933), Hawaiian steel guitarist and singer

Characters

• Henry Allen (comics), a DC Comics character and the father of Barry Allen / Flash
  • Henry Allen (The Flash), a version of the character from the 2014 TV series, The Flash

See also

• Henry Allan (disambiguation)
• Harry Allen (disambiguation)
• Alan Henry (1947–2016), Grand Prix reporter
• Alan Henry, editor at Lifehacker
• All pages with titles containing Henry Allen