The 2005 Welsh Open was a professional ranking snooker tournament that took place between 17 and 23 January 2005 at the Newport Centre in Newport, Wales.

Ronnie O'Sullivan successfully defended his title by beating Stephen Hendry 9–8.

Defending champion and World Champion Ronnie O'Sullivan 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:[1]