John Fallon (born 16 August 1940) is a Scottish former professional footballer and member of the Celtic squad that won the European Cup in 1967, which came to be known as the Lisbon Lions.

[4] Fallon became the only Lisbon Lion not to play in Celtic's win in the 1967 European Cup Final against Inter Milan, as he was the (unused) substitute goalkeeper.

While warming up for the second leg, a brick (Robert Kelly said in his book, Celtic that it was a "flat iron bar") thrown or catapulted by a member of the crowd, struck Ronnie Simpson on the head.

Although Celtic lost the return leg, and the subsequent play-off in Montevideo, amid accusations of extreme foul play from the Racing players, Fallon distinguished himself with a string of saves which caused one commentator to remark: "If that's the reserve keeper, what must the other guy be like?"

According to Kelly, when Celtic tried to get the second leg declared void because of the Simpson incident, Racing Club used Fallon's heroic performance as their counter argument, and the result stood.