| 98FM Metropolitan Cup (J1) |
| 26/03/2012 |
| Clontarf | 31 | vs | 29 | St Marys College RFC | | More |
| Referee : Noel Brannigan Venue : Castle Avenue |
| Purcell Cup (Under 21) |
| 11/03/2012 |
| St Marys College RFC | 3 | vs | 43 | Lansdowne | | More |
| Referee : Gareth Steed Venue : Templeville Rd |
| McCorry Cup (Under 21) |
| 11/03/2012 |
| Terenure College RFC | 26 | vs | 11 | St Marys College RFC | | More |
| Referee : Brian MacNeice Venue : Lakelands Park |
| Metro Plate |
| 11/04/2012 |
| St Marys College RFC | | vs | | Monkstown | | More |
| Referee : Venue : Templeville Rd |
| 01/04/2012 |
| Old Wesley | | vs | | St Marys College RFC | | More |
| Referee : Venue : Donnybrook |
| Albert O'Connell Cup (Metro J2) |
| 14/04/2012 |
| St Marys College RFC | 16 | vs | 20 | Lansdowne | | More |
| Referee : Aidan Fogarty Venue : Donnybrook |
| 31/03/2012 |
| St Marys College RFC | 10 | vs | 17 | Old Belvedere | | More |
| Referee : Simon Porter Venue : De La Salle Palmerston FC |
| 24/03/2012 |
| St Marys College RFC | 52 | vs | 3 | Old Wesley | | More |
| Referee : Kevin O'Boyle Venue : Templeville Rd |
| 08/03/2012 |
| St Marys College RFC | 46 | vs | 24 | Wanderers | | More |
| Referee : Roland Clear Venue : Templeville Rd |
| 03/03/2012 |
| St Marys College RFC | 34 | vs | 12 | Clontarf | | More |
| Referee : Roland Clear Venue : Templeville Rd |
| Moran Cup (Metro J3) |
| 30/03/2012 |
| St Marys College RFC | 19 | vs | 23 | Lansdowne | | More |
| Referee : Sean Rochford Venue : Templeville Rd |
| 23/03/2012 |
| St Marys College RFC | 13 | vs | 10 | Dublin University | | More |
| Referee : Paul McDunphy Venue : Templeville Rd |
| 13/03/2012 |
| St Marys College RFC | 83 | vs | 0 | CYM | | More |
| Referee : Tom Evans Venue : Templeville Rd |
| Winters Cup (Metro J4) |
| 24/03/2012 |
| St Marys College RFC B | 11 | vs | 37 | NUIM Barnhall A | | More |
| Referee : Dermot Dooley Venue : Templeville Rd |
| Terenure College RFC | 29 | vs | 27 | St Marys College RFC | | More |
| Referee : Alex Stavely Venue : Lakelands Park |
| 10/03/2012 |
| Coolmine | 8 | vs | 10 | St Marys College RFC B | | More |
| Referee : Tony Grehan Venue : Ashbrook |
| Parkmore | 18 | vs | 22 | St Marys College RFC | | More |
| Referee : Andre Hillerbrand Venue : Lakelands Park |
| O'Connor Cup (Metro J5) |
| 24/04/2012 |
| Clontarf | 13 | vs | 21 | St Marys College RFC | | More |
| Referee : Eoin Halpin Venue : Donnybrook |
| 14/04/2012 |
| Bective Rangers | 8 | vs | 10 | St Marys College RFC | | More |
| Referee : Humphrey Jones Venue : Glenamuck |
| 31/03/2012 |
| Normans | 0 | vs | 41 | St Marys College RFC | | More |
| Referee : Richard Kielthy Venue : Sprtsground Knocktopher Kilkenny |
| Guilfoyle-James Cup (Metro J6) |
| 12/04/2012 |
| St Marys College RFC | 5 | vs | 59 | Blackrock College RFC | | More |
| Referee : Martin Farrelly Venue : Templeville Rd |
| Leinster Senior League Cup - Playoffs |
| 12/11/2011 |
| Blackrock College RFC | 25 | vs | 22 | St Marys College RFC | | More |
| Referee : Brian Montayne Venue : Stradbrook |
| Leinster Senior League Cup - Section B |
| 17/09/2011 |
| St Marys College RFC | 26 | vs | 17 | Dublin University | | More |
| Referee : John Carvill Venue : Templeville Rd |
| 10/09/2011 |
| UCD | 28 | vs | 45 | St Marys College RFC | | More |
| Referee : Kevin Beggs Venue : Belfield |
| 03/09/2011 |
| St Marys College RFC | 14 | vs | 25 | Clontarf | | More |
| Referee : Ger English Venue : Templeville Rd |
| 26/08/2011 |
| De La Salle Palmerston | 10 | vs | 17 | St Marys College RFC | | More |
| Referee : Dermot Blake Venue : Kirwan Park |
| Metro J1 League - Section A |
| 04/03/2012 |
| UCD | 31 | vs | 44 | St Marys College RFC | | More |
| Referee : Richard Carson Venue : Templeville Rd |
| 26/02/2012 |
| St Marys College RFC | 51 | vs | 12 | Lansdowne | | More |
| Referee : Noel Brannigan Venue : Templeville Rd |
| 13/02/2012 |
| Old Belvedere | 13 | vs | 10 | St Marys College RFC | | More |
| Referee : Edward Kenny Venue : Anglesea Road |
| 23/01/2012 |
| St Marys College RFC | 38 | vs | 23 | Dublin University | | More |
| Referee : John Montayne Venue : Templeville Rd |
| 15/01/2012 |
| Clontarf | 16 | vs | 22 | St Marys College RFC | | More |
| Referee : Chris Reynolds Venue : Castle Avenue |
| 08/01/2012 |
| Bective Rangers | 13 | vs | 35 | St Marys College RFC | | More |
| Referee : Berney White Venue : Donnybrook |
| 05/12/2011 |
| St Marys College RFC | 35 | vs | 6 | UCD | | More |
| Referee : Ciaran McGowan Venue : Templeville Rd |
| 21/11/2011 |
| Lansdowne | 18 | vs | 21 | St Marys College RFC | | More |
| Referee : Nigel Correll Venue : Lansdowne Road |
| 14/11/2011 |
| St Marys College RFC | 15 | vs | 11 | Old Belvedere | | More |
| Referee : Robbie O'Flynn Venue : Templeville Rd |
| 06/11/2011 |
| Dublin University | 12 | vs | 43 | St Marys College RFC | | More |
| Referee : Noel Brannigan Venue : College Park |
| 23/10/2011 |
| St Marys College RFC | 16 | vs | 11 | Clontarf | | More |
| Referee : Gary Conway Venue : Templeville Rd |
| 17/10/2011 |
| St Marys College RFC | 62 | vs | 6 | Bective Rangers | | More |
| Referee : David Petherbridge Venue : Templeville Rd |
| JP Fanagan Premier |
| 26/02/2012 |
| St Marys College RFC | 10 | vs | 27 | UCD | | More |
| Referee : Brian MacNeice Venue : Templeville Rd |
| 19/02/2012 |
| Lansdowne | 24 | vs | 12 | St Marys College RFC | | More |
| Referee : Eanna O'Dowd Venue : Lansdowne Road |
| 12/02/2012 |
| Dublin University | 18 | vs | 23 | St Marys College RFC | | More |
| Referee : John Montayne Venue : College Park |
| 01/02/2012 |
| Old Belvedere | 35 | vs | 5 | St Marys College RFC | | More |
| Referee : Ciaran McGowan Venue : Anglesea Road |
| 15/01/2012 |
| UCD | 41 | vs | 12 | St Marys College RFC | | More |
| Referee : Danny Wallace Venue : Belfield |
| 08/01/2012 |
| St Marys College RFC | 21 | vs | 29 | Lansdowne | | More |
| Referee : Glenn Sheridan Venue : Templeville Rd |
| 04/12/2011 |
| Clontarf | 24 | vs | 32 | St Marys College RFC | | More |
| Referee : Simon Owens Venue : Castle Avenue |
| 26/11/2011 |
| St Marys College RFC | 22 | vs | 12 | Terenure College RFC | | More |
| Referee : Ciaran McGowan Venue : Templeville Rd |
| 13/11/2011 |
| St Marys College RFC | 21 | vs | 6 | Dublin University | | More |
| Referee : Glenn Sheridan Venue : Templeville Rd |
| 06/11/2011 |
| Old Wesley | 9 | vs | 16 | St Marys College RFC | | More |
| Referee : Richard Carson Venue : Ballycorus Rd |
| 23/10/2011 |
| St Marys College RFC | 5 | vs | 15 | Old Belvedere | | More |
| Referee : Gary Conway Venue : Templeville Rd |
| 09/10/2011 |
| Blackrock College RFC | 14 | vs | 17 | St Marys College RFC | | More |
| Referee : Aidan Fogarty Venue : Stradbrook |
| JP Fanagan Pennant (Phase 1) - Pool 3 |
| 13/11/2011 |
| Skerries | 28 | vs | 6 | St Marys College RFC | | More |
| Referee : Bernard McSweeney Venue : Holmpatrick |
| 06/11/2011 |
| St Marys College RFC | 5 | vs | 22 | Seapoint | | More |
| Referee : Richie English Venue : Templeville Rd |
| 23/10/2011 |
| Old Wesley | 13 | vs | 9 | St Marys College RFC | | More |
| Referee : Tom Keating Venue : Donnybrook |
| 16/10/2011 |
| St Marys College RFC | 22 | vs | 20 | Wanderers | | More |
| Referee : Garret Holland Venue : Templeville Rd |
| 09/10/2011 |
| Blackrock College RFC | 22 | vs | 10 | St Marys College RFC | | More |
| Referee : Berney White Venue : Stradbrook |
| JP Fanagan Pennant (Phase 2) - Section C |
| 02/03/2012 |
| IT Carlow | 29 | vs | 15 | St Marys College RFC | | More |
| Referee : William Murphy Venue : IT Carlow |
| 26/02/2012 |
| St Marys College RFC | 19 | vs | 20 | De La Salle Palmerston | | More |
| Referee : Eoghan Cole Venue : Templeville Rd |
| 19/02/2012 |
| St Marys College RFC | 0 | vs | 29 | Greystones | | More |
| Referee : Chris Reynolds Venue : Templeville Rd |
| 12/02/2012 |
| Coolmine | 14 | vs | 7 | St Marys College RFC | | More |
| Referee : Brendan Conroy Venue : Ashbrook |
| 15/01/2012 |
| St Marys College RFC | 5 | vs | 67 | IT Carlow | | More |
| Referee : Clive Wardrop Venue : Templeville Rd |
| 08/01/2012 |
| De La Salle Palmerston | 43 | vs | 0 | St Marys College RFC | | More |
| Referee : Tom Keating Venue : Kirwan Park |
| 04/12/2011 |
| Greystones | 45 | vs | 0 | St Marys College RFC | | More |
| Referee : Bernard Doyle Venue : Dr Hickey Park |
| 27/11/2011 |
| St Marys College RFC | 12 | vs | 12 | Coolmine | | More |
| Referee : Simon Owens Venue : Templeville Rd |
| Senior Seconds League Cup - Section B |
| 17/09/2011 |
| St Marys College RFC | 13 | vs | 17 | Dublin University | | More |
| Referee : Richard Carson Venue : Templeville Rd |
| 10/09/2011 |
| UCD | 40 | vs | 28 | St Marys College RFC | | More |
| Referee : Duncan Duke Venue : Belfield |
| 03/09/2011 |
| St Marys College RFC | 29 | vs | 34 | Clontarf | | More |
| Referee : Danny Wallace Venue : Templeville Rd |
| 26/08/2011 |
| De La Salle Palmerston | | vs | | St Marys College RFC | | More |
| Referee : Venue : Kirwan Park |
| Metro J2 League (Phase 1) - Pool 1 |
| 22/10/2011 |
| Old Belvedere | 3 | vs | 10 | St Marys College RFC | | More |
| Referee : Paul Cusack Venue : Anglesea Road |
| 15/10/2011 |
| St Marys College RFC | 50 | vs | 8 | UCD | | More |
| Referee : Jason Le Lievre Venue : Templeville Rd |
| 08/10/2011 |
| St Marys College RFC | 22 | vs | 22 | Lansdowne | | More |
| Referee : Simon Owens Venue : Templeville Rd |
| 28/09/2011 |
| CYM | 0 | vs | 57 | St Marys College RFC | | More |
| Referee : Venue : St Marys College RFC |
| Metro J2 League (Phase 2) - Section A |
| 04/02/2012 |
| Clontarf | | vs | | St Marys College RFC | | More |
| Referee : Venue : Castle Avenue |
| 28/01/2012 |
| St Marys College RFC | 16 | vs | 7 | Old Belvedere | | More |
| Referee : Paul McSweeney Venue : Templeville Rd |
| 14/01/2012 |
| St Marys College RFC | 27 | vs | 12 | Stillorgan | | More |
| Referee : Damian Poder Venue : Templeville Rd |
| 07/01/2012 |
| Lansdowne | 22 | vs | 8 | St Marys College RFC | | More |
| Referee : Alex Stavely Venue : Lansdowne Road |
| 03/12/2011 |
| St Marys College RFC | | vs | | Old Wesley | | More |
| Referee : Ian Thompson Venue : Templeville Rd |
| 26/11/2011 |
| St Marys College RFC | 36 | vs | 12 | Clontarf | | More |
| Referee : Julian Pringle Venue : Templeville Rd |
| 19/11/2011 |
| Stillorgan | 15 | vs | 27 | St Marys College RFC | | More |
| Referee : Alex Stavely Venue : CUS Sportsground Clonskeagh |
| 22/10/2011 |
| Old Belvedere | 3 | vs | 10 | St Marys College RFC | | More |
| Referee : Venue : Anglesea Road |
| 08/10/2011 |
| St Marys College RFC | 22 | vs | 22 | Lansdowne | | More |
| Referee : Venue : Templeville Rd |
| Leinster J3 League - Section A |
| 04/03/2012 |
| Blackrock College RFC | | vs | | St Marys College RFC | | More |
| Referee : TBC Venue : Stradbrook |
| 17/02/2012 |
| St Marys College RFC | 12 | vs | 18 | Old Wesley | | More |
| Referee : Steve Lambe Venue : Ballycorus Rd |
| 03/02/2012 |
| Greystones | 50 | vs | 24 | St Marys College RFC | | More |
| Referee : Richard Kielthy Venue : Dr Hickey Park |
| 27/01/2012 |
| St Marys College RFC | 23 | vs | 13 | Old Belvedere | | More |
| Referee : Garret Holland Venue : Templeville Rd |
| 13/01/2012 |
| Lansdowne | 27 | vs | 21 | St Marys College RFC | | More |
| Referee : Donagh McGowan Venue : Lansdowne Road |
| 08/01/2012 |
| Terenure College RFC | 28 | vs | 17 | St Marys College RFC | | More |
| Referee : Cillian Hogan Venue : Lakelands Park |
| 09/12/2011 |
| St Marys College RFC | 13 | vs | 3 | Suttonians | | More |
| Referee : Mark Scoyne Venue : Templeville Rd |
| 04/12/2011 |
| St Marys College RFC | 17 | vs | 10 | Blackrock College RFC | | More |
| Referee : David Stronge Venue : Templeville Rd |
| 25/11/2011 |
| Old Wesley | 24 | vs | 16 | St Marys College RFC | | More |
| Referee : Paul McSweeney Venue : Donnybrook |
| 11/11/2011 |
| St Marys College RFC | 31 | vs | 10 | Greystones | | More |
| Referee : Donagh McGowan Venue : Templeville Rd |
| 04/11/2011 |
| Old Belvedere | 36 | vs | 20 | St Marys College RFC | | More |
| Referee : Barry Neary Venue : Anglesea Road |
| 21/10/2011 |
| St Marys College RFC | 16 | vs | 27 | Lansdowne | | More |
| Referee : Donagh McGowan Venue : Templeville Rd |
| 14/10/2011 |
| St Marys College RFC | 24 | vs | 23 | Terenure College RFC | | More |
| Referee : Jason Teahan Venue : Templeville Rd |
| 09/10/2011 |
| Suttonians | 3 | vs | 22 | St Marys College RFC | | More |
| Referee : Robert Phelan Venue : John J McDowell Memorial Grounds |
| Leinster J4 League Section A (Phase 1) - Pool 1 |
| 19/11/2011 |
| St Marys College RFC | 18 | vs | 13 | Wanderers | | More |
| Referee : Eoghan Cole Venue : Templeville Rd |
| 05/11/2011 |
| Clondalkin | 10 | vs | 33 | St Marys College RFC | | More |
| Referee : Doug Gibson Venue : Gordon Park Kingswood |
| 22/10/2011 |
| Greystones | 54 | vs | 0 | St Marys College RFC | | More |
| Referee : Kevin Bolger Venue : Dr Hickey Park |
| 15/10/2011 |
| St Marys College RFC | 43 | vs | 12 | Blackrock College RFC | | More |
| Referee : Cillian Hogan Venue : Templeville Rd |
| 08/10/2011 |
| Coolmine | 22 | vs | 38 | St Marys College RFC | | More |
| Referee : Martin Nunan Venue : Ashbrook |
| Leinster J4 League Section A (Phase 2) - Premier Division |
| 03/03/2012 |
| NUIM Barnhall A | 27 | vs | 3 | St Marys College RFC | | More |
| Referee : Paul McDunphy Venue : Parsonstown |
| 18/02/2012 |
| St Marys College RFC | 20 | vs | 0 | Old Belvedere | | More |
| Referee : Tony Heaney Venue : Templeville Rd |
| 04/02/2012 |
| Wanderers | 17 | vs | 21 | St Marys College RFC | | More |
| Referee : Damian Poder Venue : Merrion Rd |
| 28/01/2012 |
| St Marys College RFC | 6 | vs | 17 | Greystones | | More |
| Referee : Greg Wynne Venue : Templeville Rd |
| 14/01/2012 |
| St Marys College RFC | 17 | vs | 5 | Lansdowne | | More |
| Referee : Martin Farrelly Venue : Templeville Rd |
| 07/01/2012 |
| St Marys College RFC | 18 | vs | 24 | NUIM Barnhall A | | More |
| Referee : Damian Poder Venue : Templeville Rd |
| 10/12/2011 |
| Old Belvedere | 16 | vs | 22 | St Marys College RFC | | More |
| Referee : Paul McDunphy Venue : Anglesea Road |
| 03/12/2011 |
| Lansdowne | 12 | vs | 20 | St Marys College RFC | | More |
| Referee : Pat Dempsey Venue : Ballycorus Rd |
| 19/11/2011 |
| St Marys College RFC | 18 | vs | 13 | Wanderers | | More |
| Referee : Venue : Templeville Rd |
| 22/10/2011 |
| Greystones | 54 | vs | 0 | St Marys College RFC | | More |
| Referee : Venue : Dr Hickey Park |
| Leinster J4 League Section C |
| 03/03/2012 |
| St Marys College RFC B | 19 | vs | 35 | Railway Union | | More |
| Referee : TBC Venue : Templeville Rd |
| 18/02/2012 |
| Millmount House | | vs | | St Marys College RFC B | | More |
| Referee : Venue : Templeville Rd |
| 04/02/2012 |
| St Marys College RFC B | 8 | vs | 13 | Malahide | | More |
| Referee : Warren Turner Venue : Templeville Rd |
| 28/01/2012 |
| Normans | 3 | vs | 25 | St Marys College RFC B | | More |
| Referee : Roger Thomas Venue : Sprtsground Knocktopher Kilkenny |
| 14/01/2012 |
| Tallaght | 0 | vs | 16 | St Marys College RFC B | | More |
| Referee : Donal Brady Venue : Tymon Park |
| 07/01/2012 |
| Unidare | 7 | vs | 13 | St Marys College RFC B | | More |
| Referee : Declan O Sullivan Venue : Templeville Rd |
| 10/12/2011 |
| Parkmore | 29 | vs | 21 | St Marys College RFC B | | More |
| Referee : Grahame Douglas Venue : Lakelands Park |
| 03/12/2011 |
| Railway Union | 7 | vs | 13 | St Marys College RFC B | | More |
| Referee : Martin Farrelly Venue : Park Avenue |
| 19/11/2011 |
| St Marys College RFC B | 27 | vs | 3 | Millmount House | | More |
| Referee : Owen Desmond Venue : Templeville Rd |
| 05/11/2011 |
| Malahide | 30 | vs | 26 | St Marys College RFC B | | More |
| Referee : Rory Duane Venue : Estuary Rd |
| 22/10/2011 |
| St Marys College RFC B | 44 | vs | 5 | Normans | | More |
| Referee : Frank Smyth Venue : Templeville Rd |
| 14/10/2011 |
| St Marys College RFC B | 44 | vs | 3 | Tallaght | | More |
| Referee : Stephen Keating Venue : Templeville Rd |
| 08/10/2011 |
| St Marys College RFC B | 22 | vs | 21 | Unidare | | More |
| Referee : Owen Desmond Venue : Templeville Rd |
| 01/10/2011 |
| St Marys College RFC B | 13 | vs | 3 | Parkmore | | More |
| Referee : Jonathan Geoghegan Venue : Templeville Rd |
| Leinster J5 League |
| 24/02/2012 |
| St Marys College RFC | 16 | vs | 10 | De La Salle Palmerston | | More |
| Referee : Venue : Templeville Rd |
| 15/02/2012 |
| St Marys College RFC | 10 | vs | 15 | Bective Rangers | | More |
| Referee : Pat Dempsey Venue : Templeville Rd |
| 04/02/2012 |
| Clontarf | 27 | vs | 3 | St Marys College RFC | | More |
| Referee : Tony Heaney Venue : St Marys College RFC |
| 28/01/2012 |
| St Marys College RFC | 7 | vs | 37 | Terenure College RFC | | More |
| Referee : Gerry O'Sullivan Venue : Templeville Rd |
| 18/01/2012 |
| De La Salle Palmerston | 22 | vs | 12 | St Marys College RFC | | More |
| Referee : John Flynn Venue : Kirwan Park |
| 14/01/2012 |
| St Marys College RFC | 20 | vs | 7 | Emerald Warriors | | More |
| Referee : Dermot Sheehan Venue : Templeville Rd |
| 07/01/2012 |
| Stillorgan | | vs | | St Marys College RFC | | More |
| Referee : Venue : CUS Sportsground Clonskeagh |
| 10/12/2011 |
| St Marys College RFC | 8 | vs | 12 | Clondalkin | | More |
| Referee : Martin Kavanagh Venue : Templeville Rd |
| 19/11/2011 |
| Bective Rangers | 48 | vs | 3 | St Marys College RFC | | More |
| Referee : Paul Dorman Venue : Glenamuck |
| 05/11/2011 |
| St Marys College RFC | 5 | vs | 34 | Clontarf | | More |
| Referee : Jonathan Geoghegan Venue : Templeville Rd |
| 22/10/2011 |
| Terenure College RFC | 37 | vs | 5 | St Marys College RFC | | More |
| Referee : Philip Mullins Venue : Lakelands Park |
| 15/10/2011 |
| Emerald Warriors | 10 | vs | 7 | St Marys College RFC | | More |
| Referee : Donal Brady Venue : Suttonians RFC |
| 08/10/2011 |
| St Marys College RFC | 15 | vs | 21 | Stillorgan | | More |
| Referee : Paul Dorman Venue : Templeville Rd |
| 01/10/2011 |
| Clondalkin | 20 | vs | 17 | St Marys College RFC | | More |
| Referee : Brian Gildea Venue : Gordon Park Kingswood |
