| Competition | Date | Opponent | Venue | Result | Goalscorers | |
| Friendly | Saturday 15-03-03 | Kildare County | Neutral - Station Road | 3-1 | T. Grant, Keddy 2 | |
| Friendly | Sunday 30-03-03 | Monaghan United | Neutral - Haddon Park | 0-0 | ||
| Friendly | Tuesday 01-04-03 | Junior International Selection | Neutral - AUL Complex | 3-0 | Fitzpatrick 2, Treacy | |
| Friendly | Sunday 06-04-03 | Bray Wanderers | Away - The Carlisle Grounds | 2-2 | Molloy, Robinson | |
| Friendly | Sunday 06-04-03 | Dublin City | Neutral - Frank Cooke Park | 1-3 | Treacy | |
| League | Friday 11-04-03 | Drogheda United | Home - Stadium of Light | 0-0 | ||
| League | Thursday 17-04-03 | St. Patrick's Athletic | Away - Stadium of Light | 1-1 | Gough (pen.) | |
| League | Monday 21-04-03 | UCD | Home - Stadium of Light | 1-0 | Kelly | |
| League | Sunday 27-04-03 | Bohemian FC | Away - Dalymount Park | 1-1 | S. Grant | |
| League | Sunday 04-05-03 | Cork City | Home - Stadium of Light | 2-1 | S. Grant, Hedermann o.g. | |
| League Cup - Group 6 | Wednesday 07-05-03 | Bray Wanderers | Away - The Carlisle Grounds | 3-0 | T. Grant, Fitzpatrick, Caffrey | |
| League | Saturday 10-05-03 | Longford Town | Away - Flancare Park | 0-0 | ||
| League | Friday 16-05-03 | Waterford United | Away - Regional Sports Centre | 0-2 | ||
| League | Friday 23-05-03 | Derry City | Home - Stadium of Light | 5-1 | Gough 2 (1 pen.) Keddy 3 | |
| League Cup - Group 6 | Monday 19-05-03 | UCD | Away - Belfield Park | 1-2 | Cousins | |
| League | Friday 30-05-03 | Shelbourne | Away - Tolka Park | 0-1 | ||
| League | Friday 06-06-03 | Drogheda United | Away - O2 Park | 2-1 | Molloy, Fitzpatrick | |
| League Cup - Quarter Finals | Monday 09-06-03 | St. Patrick's Athletic | Away - Stadium of Light | 0-3 | ||
| League | Friday 13-06-03 | St. Patrick's Athletic | Home - Stadium of Light | 1-0 | T. Grant | |
| Inter Toto Cup - 1st Round - 1st Leg | Saturday 21-06-03 | Odra Wodzislaw | Away - Stadion Mosir | 2-1 | S. Grant, T. Grant | |
| Inter Toto Cup - 1st Round - 2nd Leg | Sunday 29-06-03 | Odra Wodzislaw | Home - Stadium of Light | 1-0 | Fitzpatrick | |
| Inter Toto Cup - 2nd Round - 1st Leg | Sunday 06-07-03 | Slovan Liberec | ||||
| League | Monday 30-06-03 | UCD | Away - Belfield Park TBRSCH | |||
| League | Friday 04-07-03 | Bohemian FC | Home - Stadium of Light TBC | |||
| League | Friday 11-07-03 | Cork City | Away - Turners Cross | |||
| Inter Toto Cup - 1nd Round - 1nd Leg | Sat/Sunday 12/13-07-03 | Slovan Liberec | ||||
| League | Friday 18-07-03 | Longford Town | Home - Stadium of Light | |||
| Inter Toto Cup - 3rd Round - 1st Leg | Sat/Sunday 19/20-07-03 | |||||
| Inter Toto Cup - 3rd Round - 2nd Leg | Saturday 26-07-03 | |||||
| FAI Cup - 2nd Round | Sunday 27-07-03 | |||||
| Inter Toto Cup - Semi Finals - 1st Leg | Wednesday 30-07-03 | |||||
| League | Friday 01-08-03 | Waterford United | Home - Stadium of Light | |||
| Inter Toto Cup - Semi Finals - 2nd Leg | Wednesday 06-08-03 | |||||
| League | Thursday 07-08-03 | Derry City | Away - Brandywell Stadium | |||
| Inter Toto Cup - Final - 1st Leg | Tuesday 12-08-03 | |||||
| FAI Cup - 3rd Round | Sunday 17-08-03 | |||||
| League | Friday 22-08-03 | Shelbourne | Home - Stadium of Light | |||
| Inter Toto Cup - Final - 2nd Leg | Tuesday 26-08-03 | |||||
| League | Friday 29-08-03 | Drogheda United | Home - Stadium of Light | |||
| League | Friday 05-09-03 | St. Patrick's Athletic | Away - Stadium of Light | |||
| FAI Cup - Quarter Finals | Sunday 14-09-03 | |||||
| League | Friday 19-09-03 | UCD | Home - Stadium of Light | |||
| League | Monday 22-09-03 | Bohemian FC | Away - Dalymount Park TBC | |||
| League | Friday 26-09-03 | Cork City | Home - Stadium of Light | |||
| League | Saturday 04-10-03 | Longford Town | Away - Flancare Park | |||
| FAI Cup - Semi Finals | Saturday 04-10-03 | |||||
| League | Friday 10-10-03 | Waterford United | Away - Regional Sports Centre | |||
| League | Wednesday 15-10-03 | Derry City | Home - Stadium of Light TBC | |||
| League | Friday 17-10-03 | Shelbourne | Away - Tolka Park | |||
| League | Tuesday 21-10-03 | Drogheda United | Away - O2 Park | |||
| League | Friday 24-10-03 | St. Patrick's Athletic | Home - Stadium of Light | |||
| FAI - Cup Final | Sunday 26-10-03 | |||||
| League | Friday 31-10-03 | UCD | Away - Belfield Park | |||
| League | Wednesday 05-11-03 | Bohemian FC | Home - Stadium of Light TBC | |||
| League | Friday 07-11-03 | Cork City | Away - Turners Cross | |||
| League | Wednesday 12-11-03 | Longford Town | Home - Stadium of Light TBC | |||
| League | Friday 14-11-03 | Waterford United | Home - Stadium of Light | |||
| League | Thursday 20-11-03 | Derry City | Away - Brandywell Stadium | |||
| League | Friday 28-11-03 | Shelbourne | Home - Stadium of Light | |||
| Shamrock Rovers score first - naturally! | ||||||
