John Madigan may refer to:
John Madigan (politician) (1966–2020), Australian politician John Madigan (Gaelic footballer) (fl. 2000s), Irish player of Gaelic football John Madigan (ringmaster) (1850–1897), American circus performer John Madigan (rugby union) (born 1994), Irish rugby union player John Madigan (sportsperson, born 1946) (1946–2023), Irish rugby union player John B. Madigan (1863–1918), justice of the Maine Supreme Judicial Court