2003 Ulster Senior Football Championship
The 2003 Ulster Senior Football Championship was the 115th instalment of the annual Ulster [Senior Football Championship] organised by Ulster GAA. It was one of the four provincial competitions of the 2003 All-Ireland [Senior Football Championship].
Tyrone won their 10th title overall and their first title since 2001. Armagh, the defending Ulster and All-Ireland Champions were eliminated by Monaghan in the preliminary round.
Teams
General Information
Nine counties competed in the Ulster Senior Football Championship:| County | Last Championship Title | Last All-Ireland Title | Position in 2000 Championship | Sponsor |
| Antrim | 1951 | — | Quarter-finals | Bushmills |
| Armagh | 2002 | 2002 | Champions | Morgan Fuels |
| Cavan | 1997 | 1952 | Preliminary Round | Kingspan |
| Derry | 1998 | 1993 | Semi-finals | Sperrin Galvanisers |
| Donegal | 1992 | 1992 | Runners-Up | Abbey Hotel |
| Down | 1994 | 1994 | Quarter-finals | Canal Court Hotel |
| Fermanagh | — | — | Quarter-finals | Tracey Concrete |
| Monaghan | 1988 | — | Semi-finals | Harte Peat |
| Tyrone | 2001 | — | Quarter-finals | W.J. Dolan |