John Cowan (disambiguation)
John Cowan is an American musician.
John Cowan may also refer to:
Politics and law
- John Cowan, Lord Cowan, Senator of the College of Justice in Scotland
- Sir John Cowan (sheriff), Lord Mayor of London
- John Cowan (Newfoundland politician), politician in Newfoundland
- John F. Cowan, North Dakota lawyer, politician, Attorney General, and judge
- Sir John Cowan (Australian politician), Australian politician
- John Lancelot Cowan, Australian politician
Science and medicine
- John Black Cowan, professor of medicine at the University of Glasgow
- John Cowan (physician), American physician and phrenologist
- John Macqueen Cowan, Scottish botanist
Sports
- John Cowan (footballer, born 1870), Scottish footballer
- Johnnie Cowan, American baseball player
- John Cowan (footballer, born 1949), Northern Ireland international footballer
Others
- Sir John Cowan, 1st Baronet, of the Cowan baronets, philanthropist
- John Cowan (steel merchant), Scottish iron and steel merchant
- John Cowan (photographer), British fashion photographer
- John Cowan (RAN officer), Australian navy officer
- John W. Cowan, American computer programmer