| Rank | LW | Release
| Gross | %± LW | Theaters | Change | Average | Total Gross | Weeks | Distributor
| New This Week
| Estimated
|
|---|
| 1 | - | G.I. Joe: The Rise of Cobra | $880,332 | - | 217 | - | $4,056 | $988,495 | 1 | United International Pictures | true | false |
| 2 | 1 | Death Happen | $78,863 | -71.1% | 58 | -20 | $1,359 | $431,369 | 2 | Mongkol Film Company | false | false |
| 3 | 2 | Harry Potter and the Half-Blood Prince | $71,304 | -71.5% | 63 | -71 | $1,131 | $3,980,662 | 4 | Warner Bros. | false | false |
| 4 | 3 | Nee Dtaam Galileo | $61,480 | -68.3% | 51 | -30 | $1,205 | $832,648 | 3 | N/A | false | false |
| 5 | 4 | The Taking of Pelham 123 | $52,524 | -64.8% | 35 | - | $1,500 | $283,711 | 2 | Sony Pictures Releasing | false | false |
| 6 | - | Sam Chuk | $38,842 | - | 56 | - | $693 | $42,274 | 1 | N/A | true | false |
| 7 | 6 | The Hangover | $18,080 | -54.6% | 9 | -8 | $2,008 | $77,864 | 2 | Warner Bros. | false | false |
| 8 | 7 | Brüno | $11,591 | -39.4% | 3 | -1 | $3,863 | $38,741 | 2 | Mongkol Major | false | false |
| 9 | - | Solstice | $9,008 | - | 19 | - | $474 | $9,008 | 1 | Mongkol Major | true | false |
| 10 | 5 | Public Enemies | $7,655 | -89.4% | 20 | -43 | $382 | $322,264 | 3 | United International Pictures | false | false |
| 11 | 8 | Transformers: Revenge of the Fallen | $1,974 | -84.2% | 4 | -25 | $493 | $5,910,558 | 7 | United International Pictures | false | false |
| 12 | 10 | Echelon Conspiracy | $1,316 | -71.4% | 5 | +3 | $263 | $7,625 | 2 | N/A | false | false |
| 13 | 9 | Wongkamlao | $1,082 | -88.6% | 4 | -20 | $270 | $2,651,027 | 6 | Mongkol Film Company | false | false |
| 14 | - | Killshot | $838 | - | 1 | - | $838 | $838 | 1 | M Pictures | true | false |
| 15 | 16 | Departures | $629 | -18.8% | 1 | -1 | $629 | $27,296 | 8 | Mongkol Major | false | false |
| 16 | 12 | Public Enemy | $587 | -53.1% | 1 | - | $587 | $2,319 | 2 | M Pictures | false | false |
| 17 | 18 | April Bride | $368 | -17.7% | 1 | - | $368 | $2,246 | 3 | N/A | false | false |
| 18 | 15 | Chéri | $197 | -75.6% | 1 | - | $197 | $10,904 | 5 | N/A | false | false |
| 19 | 11 | Ice Age: Dawn of the Dinosaurs | $124 | -97.1% | 1 | -5 | $124 | $1,117,372 | 6 | 20th Century Fox International | false | false |
