John Welsh may refer to:

  • John Welsh of Ayr (1568–1622), religious leader
  • John Welsh of Irongray, religious leader
  • John Welsh (actor) (1904–1985), Irish actor
  • John Welsh (Australian footballer) (born 1938), Australian rules football player for Essendon
  • John Welsh (biologist) (1901–2002), American physiologist
  • John Welsh (bishop) (1856–1916), Bishop of Trinidad and Tobago, 1904–1916
  • John Welsh (diplomat) (1805–1886), American diplomat
  • John Welsh (English footballer) (born 1984), English football player for Grimsby Town
  • John Welsh (meteorologist) (1824–1859), FRS, Superintendent of Kew Observatory
  • Jon Welsh (born 1986), Scottish rugby union player

See also

  • Jonathan Welsh (disambiguation)
  • Jack Welsh (disambiguation)
  • John Walsh (disambiguation)
  • John Welch (disambiguation)