John Keegan (disambiguation)

John Keegan (1934–2012) was a British military historian.

John Keegan may also refer to:

• John Keegan (footballer) (born 1981), English professional footballer
• John Keegan (Australian politician) (1867–1941), Australian trade unionist and politician
• John Keegan (writer), Irish mythologist
• John C. Keegan (born 1952), American judge and politician