| XL Thailand National Games | |
| Host City: | Khon Kaen, Thailand |
| Teams: | 77 |
| Events: | 39 sports |
| Opened By: | Chumpol Silpa-archa, Deputy Prime Minister |
| Torch Lighter: | Somluck Kamsing |
| Stadium: | Khon Kaen University Stadium |
The 40th Thailand National Games (Thai: การแข่งขันกีฬาแห่งชาติ ครั้งที่ 40 "ขอนแก่นเกมส์", also known as the 2011 National Games and the Khon Kaen Games) were held in Khon Kaen, Thailand from 3 to 13 March 2012 after being postponed by the 2011 Thailand floods, with competition in 39 sports and 77 disciplines. These games were held in Khon Kaen University Sport Center. Khon Kaen also hosted the 1992 Thailand National Games