The following list or Presidents of the Past Pupils Union has been compiled.
| 1959-60 | William F. Treacy |
| 1961-62 | George E. Russell |
| 1963-64 | Tom E. O’Donnell |
| 1965-66 | Conn Shanahan |
| 1967 | Michael B. O’Malley |
| 1968-69 | Pat J. Hogan |
| 1970-71 | Pat J. Carroll |
| 1972-73 | John C. Downes |
| 1974 | Rev. Tom Stack |
| 1975-76 | Jim F. Riordan |
| 1977-78 | Dr. Dermot Molony |
| 1979-81 | Eric Neville |
| 1982 – 2005 | No Union in operation |
| 2006-10 | PPU informally reformed |
| 2011-12 | Brien Morris |
| 2013-14 | Don Reddan |
| 2015-16 | Gerry MacNamara |
| 2017-18 | Harry McNamara |
| 2018-19 | Orla Prendergast |