| Code: | Football |
| Sport: | Gaelic football |
| Jack Mangan | |
| Irish: | Seán Ó Mangáin |
| Fullname: | John Mangan |
| Feet: | 5 |
| Inches: | 11 |
| Occupation: | Salesman |
| County: | Galway |
| Province: | Connacht |
| Club: | Tuam Stars Ballymun Kickhams |
| Counties: | Galway |
| Icposition: | Goalkeeper |
| Icyears: | 1948-1958 |
| Icprovince: | 4 |
| Icallireland: | 1 |
| Nfl: | 0 |
| Birth Date: | 6 May 1927 |
| Birth Place: | Tuam, County Galway, Ireland |
| Death Date: | [1] |
| Death Place: | Wolverhampton, England |
Jack Mangan (6 May 1927 – 17 September 2013) was an Irish former Gaelic footballer who played as a goalkeeper for the Galway senior team.
Mangan is regarded as one of Galway's greatest-ever goalkeepers.[2] He made his debut for the team during the 1948 and was a regular member of the starting fifteen until his retirement due to injury a decade later. During that time he won one All-Ireland winners' medal and four Connacht winners' medals. In 1956 he captained the side to the All-Ireland title.[3]
At club level Mangan enjoyed a successful career with Tuam Stars in Galway and Ballymun Kickhams in Dublin.