Henry Williams may refer to:

Politicians

• Henry Williams (activist) (born 2000), chief of staff of the Mike Gravel 2020 presidential campaign
• Henry Williams (MP for Northamptonshire) (died 1558), Member of Parliament (MP) for Northamptonshire
• Henry Williams (alias Cromwell) (died 1604), MP for Huntingdon
• Henry Williams (died 1636) (c. 1579–1636), English politician who sat in the House of Commons at various times between 1601 and 1624
• Henry Williams (MP for Radnorshire), Welsh politician who sat in the House of Commons between 1654 and 1659
• Sir Henry Williams, 2nd Baronet (1635–1666), British Member of Parliament for Brecon and Breconshire
• Henry Williams (Massachusetts politician) (1805–1887), United States Representative from Massachusetts
• Henry Williams (New Zealand politician) (1823–1907), member of the New Zealand Legislative Council
• Henry Williams (Victorian politician) (died 1910), Australian politician
• Henry D. Williams (1893–1934), American politician from New York
• Henry H. Williams (1813–1890), American politician from Iowa
• Henry Roberts Williams (1848–1935), Australian politician
• Henry Williams (Queensland politician) (1832–1871), Member of the Queensland Legislative Assembly

Athletes

• Henry L. Williams (1869–1931), American college football player and coach
• Henry Williams (baseball) (1895–death unknown), American Negro leagues baseball player
• Henry Williams Jr. (1917–2002), American professional golfer
• Gizmo Williams (Henry L. Williams, born 1962), American player in the Canadian Football League
• Henry Williams (cricketer) (born 1967), South African cricketer
• Henry Williams (basketball) (1970–2018), American basketball player
• Henry Williams (American football) (born 1956), former professional American football player

Others

• Henry Williams (missionary) (1792–1867), English missionary to New Zealand
• Henry Harvey Williams (1917–2004), Governor-General of Saint Vincent and the Grenadines
• Henry Horace Williams (1858–1940), American philosopher and university professor
• Henry Smith Williams (1863–1943), American medical doctor and author
• Henry Williams (bishop) (1872–1961), English Anglican bishop
• Henry Williams (Medal of Honor) (1834–1917), United States Navy seaman who received the Medal of Honor
• Henry Williams (soldier) (1918-1942), United States Army private killed by a bus driver in Mobile, Alabama
• Henry Shaler Williams (1847–1918), American geologist
• Henry Sylvester Williams (1869–1911), lawyer, councillor and writer
• Rubberlegs Williams (Henry Williams, 1907–1962), American blues/jazz singer and dancer
• Henry Williams (Casualty), a fictional character from the BBC television drama Casualty, played by Tom Chadbon
• Henry Williams (priest) (fl. 1510s - 1550s), Canon of Windsor
• Henry F. Williams (1813–c. 1903), African-American composer
• Henry Howell Williams (1796–1873), American merchant
• Henry Williams, the plaintiff of Williams v. Mississippi