| Jack Silcock | |
| Full Name: | John Silcock |
| Birth Date: | 15 January 1898 |
| Birth Place: | Wigan, England |
| Position: | Left-back |
| Years1: | 1919–1934 |
| Clubs1: | Manchester United |
| Caps1: | 423 |
| Goals1: | 2 |
| Years2: | 1934–1935 |
| Clubs2: | Oldham Athletic |
| Caps2: | 0 |
| Goals2: | 0 |
| Years3: | 1936 |
| Clubs3: | Droylsden |
| Nationalyears1: | 1921–1923 |
| Nationalteam1: | England |
| Nationalcaps1: | 3 |
| Nationalgoals1: | 0 |
John Silcock (15 January 1898 – 28 June 1966) was an English footballer, who played at left-back, spending most of his career at Manchester United.
As a youth, Silcock played for Aspull Juniors and Atherton, before signing for Manchester United as a trainee in 1916. He started his professional career with them 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. He briefly came out of retirement in 1936, to play for Droylsden.
Silcock won three caps for England between 1921 and 1923.
He died in 1966, at the age of 68.