John Fuller may refer to:

• John Fuller (Massachusetts politician), representative to the Great and General Court
• John Fuller (died 1744), British Member of Parliament for Plympton Erle, 1728–1734
• John Fuller (1680–1745), British Member of Parliament for Sussex, 1713–1715
• John Fuller (1706–1755), British Member of Parliament for Boroughbridge, 1754–1755
• John Fuller (1732–1804), British Member of Parliament for Tregony, 1754–1761
• Mad Jack Fuller (John Fuller, 1757–1834), English politician, philanthropist and patron of the arts, and Squire of the hamlet of Brightling
• Sir John Fuller, 1st Baronet (1864–1915), British Liberal politician and Governor of Victoria
• John Fuller (Australian politician) (1917–2009), New South Wales minister in the Robert Askin government
• John Fuller (Montana politician), member of the Montana House of Representatives
• John Fuller, Baron Fuller (born 1968), British Conservative Party councillor and life peer

• John W. Fuller (1827–1891), Union general
• J. F. C. Fuller (John Frederick Charles Fuller, 1876–1966), British soldier
• John Augustus Fuller (1828–1902), British Army officer
• John V. Fuller (born 1965), United States Navy admiral

• John G. Fuller (1913–1990), New England–based American author
• John Fuller (poet) (born 1937), English poet and author
• Johnny Fuller (musician) (1929–1985), American blues singer and guitarist
• Jack Fuller (author), Pulitzer Prize for Editorial Writing-winning author and former editor and publisher of the Chicago Tribune
• John Fuller (singer) (1850–1923), New Zealand singer and theatrical company manager
• John Fuller (theatrical entrepreneur) (1879–1959), his son, New Zealand theatrical entrepreneur

• Johnny Fuller (born 1946), American football player
• John Fuller (baseball) (born 1950), Major League baseball player
• John Fuller (cricketer) (1834–1893), English cricketer, clergyman and academic

• John Fuller (college head) (died 1558/9), master of Jesus College, Cambridge
• John Fuller (bushranger) (1830–1865), Australian bushranger
• John L. Fuller (1910–1992), behavior geneticist
• John Doc Fuller, prison coach, motivational speaker and author
• John Fuller (surgeon), Scottish surgeon and historian