John Coulter, Coalter, or Colter may refer to: John Coalter (1771–1838), Virginia lawyer John Colter (c. 1774–1812 or 1813), member of the Lewis and Clark Expedition John Coulter (Lord Provost) (c. 1680–1747), Lord Provost of Glasgow from 1736 to 1738 John Coulter (playwright) (1888–1980), Irish-born Canadian playwright John Coulter (politician) (born 1930), Australian politician John Merle Coulter (1851–1928), American botanist John B. Coulter (1891–1983), American general Jackie Coulter (1912–1981), Northern Irish footballer Jackie Coulter (loyalist) (1954–2000), Northern Irish loyalist