The 2003 UK Championship (officially the 2003 Travis Perkins UK Championship) was a professional ranking snooker tournament that took place between 18 and 30 November 2003 at the Barbican Centre in York, England. The event was broadcast on the BBC between 22 and 30 November 2003 and was the third ranking event of the 2003/2004 season. This marked the first event of three consecutive events sponsored by building merchant Travis Perkins.

Mark Williams was the defending champion, but he lost his last 32 match against Fergal O'Brien.

Matthew Stevens won his first ranking title when by defeating five times UK champion Stephen Hendry 10–8. In the final Hendry failed a 147 attempt, when he missed the yellow while on 120. The highest break of the tournament was 143 made by Ali Carter.

Defending champion and World Champion Mark Williams was the number 1 seed. The remaining places were allocated to players based on the world rankings.

The breakdown of prize money for this year is shown below:

Qualifying for the tournament took place at Pontin's in Prestatyn, Wales between 14 and 23 October 2003.

Best of 17 frames