Other
- John Carter (architect) (1748–1817), English draughtsman and architect
- John Carter (Royal Navy officer) (1785–1863), Royal Navy officer during the French Revolutionary and Napoleonic Wars
- John Carter (author) (1905–1975), English author, book-collector and bookseller
- John Cain Carter (born 1966), American rancher and environmentalist
- John Carter (evangelist), Seventh-day Adventist evangelist
- John Carter (insurer) (born 1937), chairman of Commercial Union (1994–1998)
- John Carter (Mayor of Portsmouth) (1741–1808), English merchant and mayor
- John Carter (mouth artist) (1815–1850), disabled English artist
- John Carter (smuggler) (1770–1807), "King of Prussia", smuggler operating out of Prussia Cove, Cornwall
- John Carter (sound engineer) (1907–1982), American sound engineer
- John Carter (police officer) (1882–1944), Assistant Commissioner of the London Metropolitan Police, 1938–1940
- John Carter (Christadelphian) (1899–1962), editor of The Christadelphian from 1937 to 1962
- John C. Carter (1837–1864), Confederate general in the American Civil War
- John Coates Carter (1859–1927), English architect
- John Carter (1942–2000), founder of Carter's Steam Fair
- John Charles Carter, the birth name of Charlton Heston
- Carter (artist) (John Carter, born 1970), contemporary American artist
- John Franklin Carter (1897–1967), American journalist
- John Carter, Nerdapalooza founder
- John Carter (born 1942), sculptor and Royal Academician
- John Carter (endocrinologist) (born 1944), Australian medical academic and endocrinologist
- John W. Carter (died 1895), partner in Carter's Ink Company in Massachusetts
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