John O'Donovan

John O'Donovan may refer to:
 * John O'Donovan (scholar) (1806–1861), Irish language scholar and place-name expert
 * John O'Donovan (politician) (1908–1982), Irish TD and Senator
 * John O'Donovan (police commissioner) (1858–1927), New Zealand police commissioner
 * John O'Donovan (Gaelic footballer) (1889–1920), Irish footballer
 * John O'Donovan, guitarist with The Adolescents punk band