John Gregg may refer to:

Politicians

  • John Gregg (Guildford MP) (died 1431 or after), English MP for Guildford
  • John Gregg (Texas politician) (1828–1864), American politician from Texas who was killed in action during the American Civil War
  • John R. Gregg (born 1954), American politician from Indiana

Religion

  • John Gregg (bishop of Cork) (1798–1878), Anglican Bishop of Cork, Cloyne and Ross, 1862–1878
  • John Gregg (archbishop of Armagh) (1873–1961), Anglican Archbishop of Armagh 1939–1959

Others

  • John Irvin Gregg (1826–1892), United States Army general
  • John Robert Gregg (1867–1948), Irish-born American inventor of Gregg shorthand
  • John P. Gregg (1876–1963), head football coach at Louisiana State University, 1899
  • John William Gregg (1880–1969), American landscape architect
  • John Gregg (1899–1986), companion of philanthropist Robert Allerton
  • John Gregg (baker) (1909–1964), British founder of Greggs bakery
  • John Gregg (actor) (1939–2021), Australian actor
  • John Gregg (loyalist) (1957–2003), Ulster loyalist, member of the UDA

See also

  • John Gregg Fee (1816–1901), founder of Berea College
  • John Greig (disambiguation)