The 1966 All-Ireland Junior Football Championship was the 45th staging of the All-Ireland Junior Championship since its establishment by the Gaelic Athletic Association in 1912.
Galway entered the championship as defending champions, however, they were beaten by Down in the All-Ireland semi-final.
The All-Ireland final was played on 23 October 1966 at the Gaelic Grounds in Limerick, between London and Cork, in what was their second ever meeting in the final. London won the match by 1âÂÂ06 to 0âÂÂ08 to claim their second championship title overall and a first tile in 28 years.