John Welsh

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