John Prendergast may refer to:
- John Prendergast (priest) (fl. 1583âÂÂ1610), Dean of Lismore and prebendary of Cashel
- John Patrick Prendergast (1808âÂÂ1893), Irish historian
- John Prendergast (artist) (1815âÂÂ?), British born painter
- John Prendergast (British Army officer) (1910âÂÂ2008), British army officer
- John Vincent Prendergast (1912âÂÂ1993), British senior colonial policeman and intelligence officer
- John Robert Prendergast (1930/31âÂÂ2016), Canadian football player
- John Barry Prendergast (1933âÂÂ2011), better known as John Barry (composer), composer of film soundtracks, including many James Bond films
- John Prendergast (activist) (born 1963), American human rights activist