John "Jack" Silcock (January 15, 1898 in Wigan, Lancashire, – June 28, 1966) was an English football player, who played at left-back.
Silcock started his professional career with Manchester United in 1919. He made 423 appearances (scoring 2 goals) for the club before leaving in 1934 for Oldham Athletic, where he remained until retiring as a player.
Silcock won three caps for England between 1921 and 1923.
He died in June 1966 at the age of 68.