Arthur or Art Williams may refer to:

Government and politics

• Arthur B. Williams (1872–1925), U.S. congressman from Michigan
• Arthur J. Williams, member of the North Carolina General Assembly
• Arthur Henry Williams (1894–1968), Canadian trade unionist and politician
• Arthur Henry Winnington Williams (1913–2012), member of the Jamaican House of Representatives
• Arthur Trefusis Heneage Williams (1837–1885), Canadian politician and soldier
• Arthur James Williams (politician) (1880–1962), British trade unionist and Lord Mayor of Cardiff
• Arthur Williams (Australian politician) (1888–1968), Australian politician and member of the New South Wales Legislative Assembly
• Arthur John Williams (1834–1911), Welsh lawyer, author and Member of Parliament for South Glamorganshire, 1885–1895
• Arthur Williams (Samoan politician) (died 1953), member of the Legislative Council of Samoa

Sports

• Art Williams (outfielder) (1877–1941), Major League Baseball player
• Arthur Williams (footballer) (1902–1960), Australian rules footballer
• Arthur Williams (cricketer) (active 1927/8), New Zealand cricketer
• Art Williams (umpire) (1934–1979), National League umpire
• Art Williams (1939–2018), American basketball player
• Arthur Howard Williams (born 1950), Welsh chess master
• Essop Moosa (born 1952/1953), South African soccer player under pseudonym Arthur Williams
• Arthur Williams (boxer) (born 1964), American boxer
• Arthur Williams (presenter) (born 1986), British television presenter and Paralympic cyclist

Other

• Arthur Williams (actor) (1844–1915), English actor, singer and playwright
• Arthur Williams (bishop) (1848–1914), Anglican colonial bishop
• Arthur Williams (trade unionist) (1899–?), British trade union leader
• Arthur Benjamin Williams Jr. (born 1935), bishop of the Episcopal Diocese of Ohio
• Arthur Williams (electrical engineer) (1868–1937), American electrical engineer and executive
• Arthur Williams (priest) (1899–1974), English Anglican Archdeacon of Bodmin
• Arthur J. Williams Jr., American-born counterfeiter and subject of the book, The Art of Making Money
• Arthur Williams (Elevator Bandit) (1946–2010), American career criminal known as the "Elevator Bandit"
• Arthur E. Williams (born 1938), U.S. Army general
• Arthur L. Williams Jr. (born 1942), founder of Primerica Financial Services
• Lukyn Williams (Arthur Lukyn Williams, 1853–1943), Christian author
• Arthur Stanley Williams (1861–1938), British solicitor and amateur astronomer
• Arthur James Williams, pilot who helped develop aviation in Guyana, then British Guiana
• Arthur Llewellyn Williams (1856–1919), bishop of Nebraska
• Arthur Williams (rugby league) (1902–1948), Australian rugby league footballer