| John Nallen | |
| Irish: | Seán Mac Nailín |
| Occupation: | Bank official |
| Height: | 180cm |
| Sport: | Gaelic football |
| Code: | Football |
| County: | Galway |
| Province: | Connacht |
| Club: | Crossmolina Tuam Stars Trim Castlerahan |
| Clcounty: | 8 |
| Counties: | Galway Galway Mayo Meath |
| Icyears: | 1951; 1959–1960 1952–1958 1961–1963 |
| Icposition: | Left corner-forward |
| Icprovince: | 3 |
| Icallireland: | 0 |
| Nfl: | 1 |
| Birth Date: | 1932 |
| Birth Place: | Crossmolina, County Mayo, Ireland |
| Death Date: | 4 January 2019 (aged 86) |
| Death Place: | Cullies, County Cavan, Ireland |
John P. Nallen (1932 – 4 January 2019) was an Irish Gaelic footballer who played for club sides Crossmolina, Tuam Stars, Trim and Castlerahan and at inter-county level with the Mayo, Meath, Galway and Cavan senior teams.[1]