Others
- John Watts (merchant) (died 1616), English merchant and shipowner
- John Watts (Cherokee chief) (died 1802), known as Whiteman Killer Watts
- John Watts (composer) (1929–1982), American composer
- John Watts (sailor) (c. 1778–1823), U.S. merchant captain from Virginia
- John K. Watts (born 1937), Australian sportsman and broadcaster
- John Watts, British singer/guitarist and core member of Fischer-Z
- John Cliffe Watts (1786–1873), British military officer and colonial architect in New South Wales
- Johnny Watts (1931–2006), English football player for Birmingham City F.C.
- John Watts de Peyster (1821–1907), author on the art of war, philanthropist, and early Adjutant General of the New York National Guard
- John Watts de Peyster, Jr. (1841–1873), Union Army officer during the American Civil War
- John Watts (British Army officer) (1930–2003), British general
- John Watts (jockey) (1860–1902), British jockey
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