| WPA World 9-Ball Championship 2005 | |
| Location: | Kaohsiung, Taiwan |
| Start Date: | July 2, 2005 |
| End Date: | July 10, 2005 |
| Sport: | 9-ball |
| Runner-Up1: | Kuo Po-Cheng |
| Tournament Format: | Round robin / Single Elimination |
| Host: | WPA World Nine-ball Championship |
| Participants: | 128 |
| Champion: | Wu Chia-ching |
| Previous: | 2004 |
| Next: | 2006 |
The 2005 WPA World Nine-ball Championship was the 16th edition of the WPA World Championship for 9-Ball Pool. It took place from July 2 to 10, 2005 in the Taiwanese city, Kaohsiung.
Taiwanese Wu Chia-ching won the championship with a 17–16 victory in the final against compatriot Kuo Po-Cheng. Defending champion Alex Pagulayan was eliminated by Vilmos Földes in the round of 32.
The 128 participating players were divided into 16 groups, in which they competed in round robin mode against each other. The top four players in each group qualified for the final round played in the knockout system, featuring the remaining 64 players.
The following players exited the competition in the group stage:
| 5. Place | 6. Place | 7. Place | 8. Place | ||
|---|---|---|---|---|---|
| Group 1: |  |  | Pan Shen-ping | ||
| Group 2: |  |  Jerry Calderon | |||
| Group 3: |  Charlie Williams | ||||
| Group 4: |  Jakob Lyng | ||||
| Group 5: |  Naoyuki Ōi | ||||
| Group 6: |  |  Steve Hock Chin | |||
| Group 7: |  Jeff White | ||||
| Group 8: | Alan Tan | ||||
| Group 9: | |  Irfan Ahmed Khan | |||
| Group 10: | Anthony Ginn | ||||
| Group 11: |  | Louis Condo | |||
| Group 12: |  |  Washana Poonjaeng | |||
| Group 13: |  |  Lee Chenman | |||
| Group 14: | | Hiroshi Takenaka | |||
| Group 15: | David Larsson | ||||
| Group 16: |  Phil Wilkinson |