John Logan may refer to:
Literature
- John Logan (minister) (1748–1788), Scottish poet and minister at Leith
- John Logan (poet) (1923–1987), American poet and educator
- John Logan (writer) (born 1961), American screenwriter and playwright
- John Logan, a fictional character in Ian McEwan's 1997 novel Enduring Love and its 2004 film adaptation
Military
- SS John A. Logan or USS Alnitah (AK-127), American US Navy ship in service during the Second World War
- John Logan (pioneer) (1747–1807), Indian fighter and first treasurer of the U.S. state of Kentucky
- John A. Logan (John Alexander Logan, 1826–1886), American soldier and politician
- John Alexander Logan Jr. (1865–1899), American United States Army major; posthumous Medal of Honor award
Music
- John "Juke" Logan (1946–2013), American blues harmonica player and songwriter
Sport
- John Logan (footballer, born 1912) (1912–1980), English footballer
- John Logan (footballer, born 1871) (1871–after 1896), Scottish footballer
Others
- John Logan (judge) (born 1956), Australian judge of the Federal Court of Australia
- John Lee Logan (1848–1890), American lawyer and judge
- John R. Logan (born 1946), American sociologist
- Paddy Logan (politician) (John William Logan, 1845–1925), British politician