| Rank | LW | Release
| Gross | %± LW | Theaters | Change | Average | Total Gross | Weeks | Distributor
| New This Week
| Estimated
|
|---|
| 1 | 1 | Bangkok Traffic (Love) Story | $908,636 | -46.7% | 131 | -76 | $6,936 | $3,173,600 | 2 | GMM Tai Hub (GTH) | false | false |
| 2 | - | Haunted Universities | $463,458 | - | 86 | - | $5,389 | $505,368 | 1 | Mongkol Film Company | true | false |
| 3 | - | Surrogates | $333,538 | - | 83 | - | $4,018 | $689,888 | 1 | Walt Disney Pictures | true | false |
| 4 | 2 | Law Abiding Citizen | $83,372 | -48.7% | 59 | -16 | $1,413 | $312,502 | 2 | Mongkol Major | false | false |
| 5 | - | My Dream Boat | $71,602 | - | 46 | - | $1,556 | $79,073 | 1 | Five Star Entertainment | true | false |
| 6 | 3 | G-Force | $50,934 | -52.8% | 26 | -35 | $1,959 | $1,422,067 | 4 | Walt Disney Pictures | false | false |
| 7 | 5 | The Ugly Truth | $29,668 | -53% | 18 | -1 | $1,648 | $366,776 | 3 | Sony Pictures Releasing | false | false |
| 8 | 6 | New York, I Love You | $15,542 | -8% | 5 | - | $3,108 | $39,116 | 2 | N/A | false | false |
| 9 | 4 | Oh My Ghosts! | $8,868 | -87.8% | 18 | -43 | $492 | $1,679,688 | 4 | Pranakorn Films | false | false |
| 10 | 7 | The Time Traveler's Wife | $1,868 | -73.5% | 3 | -8 | $622 | $122,210 | 4 | Warner Bros. | false | false |
| 11 | - | Kafû o machiwabite | $1,776 | - | 1 | - | $1,776 | $1,776 | 1 | Mongkol Major | true | false |
| 12 | 10 | Bad Lieutenant: Port of Call New Orleans | $1,258 | -74.6% | 4 | -4 | $314 | $27,919 | 3 | N/A | false | false |
| 13 | 14 | Harry Potter and the Half-Blood Prince | $1,091 | -2% | 1 | - | $1,091 | $4,146,070 | 15 | Warner Bros. | false | false |
| 14 | 17 | Broken Embraces | $534 | -15.8% | 1 | - | $534 | $7,324 | 4 | M Pictures | false | false |
| 15 | 9 | Fame | $433 | -91.3% | 2 | -15 | $216 | $40,843 | 3 | M Pictures | false | false |
| 16 | 15 | Tidal Wave | $417 | -57.4% | 1 | - | $417 | $1,967 | 2 | N/A | false | false |
| 17 | 20 | Transformers: Revenge of the Fallen | $309 | -24.4% | 1 | - | $309 | $6,024,384 | 18 | United International Pictures | false | false |
| 18 | 23 | Inglourious Basterds | $218 | -2.7% | 1 | - | $218 | $311,150 | 10 | United International Pictures | false | false |
| 19 | 27 | 9 | $201 | +38.6% | 2 | +1 | $100 | $20,517 | 7 | M Pictures | false | false |
| 20 | 18 | The Final Destination | $135 | -74.2% | 1 | - | $135 | $1,369,541 | 8 | Warner Bros. | false | false |
| 21 | 16 | Whiteout | $54 | -93.6% | 1 | - | $54 | $137,743 | 6 | Warner Bros. | false | false |
