John or Jack Bowen may refer to:

• William Bowen (British politician) (John William Bowen, 1876–1965), Member of Parliament for Crewe, 1929–1931
• John C. Bowen (1872–1957), Canadian clergyman, politician, and sixth and longest-serving lieutenant governor of Alberta
• John Henry Bowen (1780–1822), American politician
• John W. Bowen (1926–2011), Republican politician in the Ohio Senate

• John Bowen (bishop) (1815–1859), bishop of Sierra Leone
• John W. E. Bowen Sr. (1855–1933), Methodist clergyman and educator

• John Eliot Bowen (1858–1890), American author
• John Bowen (British author) (1924–2019), British playwright and novelist

• John Bowen (Royal Navy officer) (1780–1827), English sailor and administrator; founded the first settlement at Hobart, Australia
• John Bowen (pirate) (died 1704), pirate active in the Indian Ocean and Red Sea
• John Bowen (antiquary) (1756–1832), English painter, genealogist and antiquarian
• John Bowen (alderman) (1844–1926), English businessman
• John Clyde Bowen (1888–1978), U.S. federal judge
• John J. Bowen Jr. (born 1955), American entrepreneur
• John S. Bowen (1830–1863), American Confederate general
• John S. Bowen (executive) (born c. 1927), American advertising executive
• John S. Bowen (sound designer), American synthesizer designer
• John Templeton Bowen (1857–1940), American dermatologist
• John T. Bone (John Gilbert Bowen, 1947–2019), British-born American pornographic film director
• John W. Bowen (1910–1977), U.S. Army lieutenant general
• John Bowen, 3rd Baronet (1918–1939), of the Bowen baronets

• Jack Bowen (rugby union) (born 2003), Australian rugby union player

• Jonathan Bowen (born 1956), British computer scientist and professor
• Bowen (surname)