Others
- John Walsh (born 1945), host of America's Most Wanted
- John Walsh (artist) (born 1954), New Zealand painter
- John Walsh (scientist) (1726–1795), British scientist and Secretary to the Governor of Bengal
- John Walsh (art historian) (born 1937), Director of the J. Paul Getty Museum, 1983–2000
- John Walsh (department store), a department store in Sheffield, England
- John Walsh (printer) (1665/1666–1736), and his son John Walsh (1709–1766), music publishers
- John Christopher Walsh, appellant in the Christy Walsh case in Northern Ireland
- John F. Walsh Jr., American lawyer listed as former Pioneer Fund director
- Jack Walsh, the character portrayed by Robert De Niro in the film Midnight Run
- Johnny Walsh (gang member) (1852–1883), NYC gangster
- John Walsh (Medal of Honor) (1841–1924), Irish-born Union Army soldier during the American Civil War
- John G. Walsh, American economist and acting Comptroller of the Currency
- John Henry Walsh (1810–1888), English writer on sport under the pseudonym of "Stonehenge"
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