| Jack Mellor | |
| Birth Date: | July 1906 |
| Birth Place: | Oldham, England |
| Position: | Full back |
| Years1: | 192x–1929 |
| Years2: | 1929–1937 |
| Caps2: | 116 |
| Goals2: | 0 |
| Years3: | 1937–1939 |
| Clubs3: | Cardiff City |
| Caps3: | 28 |
| Goals3: | 0 |
John Mellor (born July 1906, date of death unknown) was an English footballer who played as a full back in the Football League for Manchester United and Cardiff City. He was born in Oldham, Lancashire. In his early days, he played for Witton Albion.[1] In June 1929, he was sold to Manchester United, where he made 122 appearances without scoring. He stayed with United until 1937 when he was sold to Cardiff City.[2] He made his Cardiff debut in an 8–1 defeat of Luton Town and stayed for two seasons before being forced to retire from injury.