John Marr

John Marr or Johnny Marr may refer to:


 * John Marr (before 1410–after 1454), Scottish regional administrator (List of Provosts and Lord Provosts of Aberdeen)
 * John Quincy Marr (1825–1861), American military officer
 * John Edward Marr (1857–1933), English geologist and academic
 * John Ralston Marr, British Indologist and writer
 * John S. Marr (born 1940), American physician, epidemiologist, and author
 * Johnny Marr (born 1963), English musician