| Jack Mew | |
| Fullname: | John William Mew |
| Birth Date: | 30 March 1889 |
| Birth Place: | Sunderland, England |
| Height: | [1] |
| Position: | Goalkeeper |
| Youthclubs1: | Blaydon United |
| Youthclubs2: | Marley Hill United |
| Years1: | 1912–1926 |
| Caps1: | 186 |
| Goals1: | 0 |
| Years2: | 1926–1927 |
| Clubs2: | Barrow |
| Caps2: | 29 |
| Goals2: | 0 |
| Totalcaps: | 215 |
| Totalgoals: | 0 |
| Nationalyears1: | 1920 |
| Nationalcaps1: | 1 |
| Nationalgoals1: | 0 |
John William Mew (30 March 1889 – 16 January 1963) was an English footballer who played as a goalkeeper.
Born in Sunderland, he attended Marley Hill Council School where he first played football. In July 1912, he was signed by Manchester United. He won a Central League Championship medal in 1913. He stayed with United until 1926 when he moved to Barrow, where he spent one season before retiring. During his United career, he made 199 appearances, only missing four League matches in four seasons.
He made one appearance for England against Ireland on 23 October 1920.
In 1927, he became a trainer-coach for TSV Lyra in Belgium. In June 1928, he became a coach for Lima.
He was married and lived in Stretford. His only son, Allen Cyril, was in the R.A.F. during the Second World War and was killed while training young pilots.