| Rank | LW | Release
| Gross | %± LW | Theaters | Change | Average | Total Gross | Weeks | Distributor
| New This Week
| Estimated
|
|---|
| 1 | 1 | Phobia 2 | $492,370 | -66% | 141 | -79 | $3,491 | $2,754,809 | 2 | GMM Tai Hub (GTH) | false | false |
| 2 | - | The Proposal | $244,511 | - | 51 | - | $4,794 | $335,133 | 1 | Walt Disney Pictures | true | false |
| 3 | - | District 9 | $201,143 | - | 54 | - | $3,724 | $247,205 | 1 | M Pictures | true | false |
| 4 | - | Dreamaholic | $193,104 | - | 69 | - | $2,798 | $193,104 | 1 | Mongkol Film Company | true | false |
| 5 | 2 | The Final Destination | $73,400 | -59% | 58 | -34 | $1,265 | $1,234,568 | 3 | Warner Bros. | false | false |
| 6 | - | Whiteout | $51,689 | - | 41 | - | $1,260 | $51,689 | 1 | Warner Bros. | true | false |
| 7 | 3 | Gamer | $12,534 | -83% | 33 | -26 | $379 | $359,296 | 3 | M Pictures | false | false |
| 8 | 5 | My Ex | $7,571 | -79.4% | 26 | -38 | $291 | $1,408,718 | 4 | RS Film & Distribution | false | false |
| 9 | 11 | 9 | $3,909 | -39.3% | 1 | - | $3,909 | $13,849 | 2 | M Pictures | false | false |
| 10 | 7 | My Sister's Keeper | $2,957 | -69% | 5 | -3 | $591 | $16,660 | 2 | Warner Bros. | false | false |
| 11 | 9 | The Naked Kitchen | $2,190 | -70.4% | 10 | +1 | $219 | $12,226 | 2 | Mongkol Major | false | false |
| 12 | 12 | Transformers: Revenge of the Fallen | $1,796 | -69.2% | 12 | -12 | $149 | $5,927,818 | 13 | United International Pictures | false | false |
| 13 | 14 | Crows Zero II | $1,646 | -44.7% | 1 | - | $1,646 | $5,644 | 2 | N/A | false | false |
| 14 | 17 | Harry Potter and the Half-Blood Prince | $1,515 | -12.3% | 1 | - | $1,515 | $4,074,468 | 10 | Warner Bros. | false | false |
| 15 | 13 | Coco Before Chanel | $1,427 | -62% | 4 | -3 | $356 | $61,378 | 5 | N/A | false | false |
| 16 | 15 | Ponyo | $1,406 | -32.9% | 2 | - | $703 | $23,155 | 4 | M Pictures | false | false |
| 17 | 10 | Inglourious Basterds | $1,372 | -79.5% | 2 | -9 | $686 | $300,535 | 5 | United International Pictures | false | false |
| 18 | 8 | Land of the Lost | $1,188 | -85.2% | 3 | -3 | $396 | $29,778 | 3 | United International Pictures | false | false |
| 19 | 16 | G.I. Joe: The Rise of Cobra | $556 | -72.5% | 2 | -5 | $278 | $2,379,737 | 7 | United International Pictures | false | false |
| 20 | 18 | Echelon Conspiracy | $431 | -64.8% | 1 | -1 | $431 | $18,308 | 8 | N/A | false | false |
