| Jack Ainscough | |
| Fullname: | John Ainscough |
| Birth Date: | 1926 3, df=y |
| Birth Place: | Adlington, England |
| Death Place: | Bolton, England |
| Position: | Centre-half |
| Youthyears1: | Astley Bridge |
| Years1: | 1950–1954 |
| Clubs1: | Blackpool |
| Caps1: | 7 |
| Goals1: | 0 |
| Years2: | 1954–1966 |
| Clubs2: | Fleetwood Town |
| Caps2: | 421 |
| Goals2: | ? |
John Ainscough (26 March 1926 – 16 December 2004) was an English professional footballer. A centre-half, he played in the Football League for Blackpool.[1] He played seven League games for the club between 1950 and 1954.[2] He moved to near neighbours Fleetwood Town in 1954, playing a then record 421 games for the club before retiring in 1966.