|Dates||17–21 August 2005|
|Organisation(s)||World Professional Billiards and Snooker Association|
|Total prize fund||£104,000|
|Highest break||Alan McManus (140)|
The 2005 Northern Ireland Trophy was the first edition of the Northern Ireland Trophy snooker tournament, held from 17 to 21 August 2005, at the Waterfront Hall, Belfast, Northern Ireland. Matthew Stevens defeated Stephen Hendry by nine to seven (9–7) in the final. Alan McManus made the highest with 140. This was the only year the tournament was held as a non-ranking event; it would become a ranking tournament for the next three seasons.
The top 16 ranked players were invited, Paul Hunter and Stephen Lee did not participate. They were replaced by Ali Carter and 2005 World Champion Shaun Murphy. Northern Ireland players Mark Allen and Joe Swail were invited as wildcards along with Ding Junhui and Neil Robertson.
The breakdown of prize money for this year is shown below:
- Winner: £23,000
- Final: £12,000
- Semi-final: £6,500
- Quarter-final: £5,000
- Last 16: £4,000
- Wildcard round: £4,000
Players who entered as wildcards received less prize money: Robertson received £3,500 for reaching the semi-final, Allen and Swail received £2,000 for reaching the quarter-finals while Ding received £1,000 for reaching the last 16.
|WC1||Steve Davis||0–4||Mark Allen|
|WC2||Ali Carter||0–4||Ding Junhui|
|WC3||Ian McCulloch||0–4||Neil Robertson|
|WC4||Joe Perry||1–4||Joe Swail|
|Last 16 |
Best of 7 frames
Best of 9 frames
Best of 11 frames
Best of 17 frames