| Rank | LW | Release
| Gross | %± LW | Theaters | Change | Average | Total Gross | Weeks | Distributor
| New This Week
| Estimated
|
|---|
| 1 | 1 | Bangkok Traffic (Love) Story | $437,112 | -51.9% | 105 | -26 | $4,162 | $3,926,057 | 3 | GMM Tai Hub (GTH) | false | false |
| 2 | - | This Is It | $164,313 | - | 24 | - | $6,846 | $164,313 | 1 | Sony Pictures Releasing | true | false |
| 3 | 3 | Surrogates | $145,736 | -56.3% | 79 | -4 | $1,844 | $924,735 | 2 | Walt Disney Pictures | false | false |
| 4 | 2 | Haunted Universities | $130,683 | -71.8% | 56 | -30 | $2,333 | $773,120 | 2 | Mongkol Film Company | false | false |
| 5 | - | The Rebound | $44,739 | - | 18 | - | $2,485 | $51,151 | 1 | Mongkol Major | true | false |
| 6 | 5 | My Dream Boat | $40,159 | -43.9% | 52 | +6 | $772 | $157,080 | 2 | Five Star Entertainment | false | false |
| 7 | - | Ja-eh goy laew ja | $30,809 | - | 34 | - | $906 | $30,809 | 1 | N/A | true | false |
| 8 | 4 | Law Abiding Citizen | $27,238 | -67.3% | 40 | -19 | $680 | $370,165 | 3 | Mongkol Major | false | false |
| 9 | - | Scandal Makers | $25,034 | - | 22 | - | $1,137 | $25,034 | 1 | N/A | true | false |
| 10 | - | Doraemon the Movie: The New Records of Nobita's Spaceblazer | $23,461 | - | 16 | - | $1,466 | $25,410 | 1 | N/A | true | false |
| 11 | 7 | The Ugly Truth | $11,057 | -62.7% | 9 | -9 | $1,228 | $388,005 | 4 | Sony Pictures Releasing | false | false |
| 12 | 8 | New York, I Love You | $7,872 | -49.4% | 5 | - | $1,574 | $51,818 | 3 | N/A | false | false |
| 13 | - | The Scout | $7,434 | - | 33 | - | $225 | $7,434 | 1 | N/A | true | false |
| 14 | 6 | G-Force | $5,030 | -90.1% | 7 | -19 | $718 | $1,438,015 | 5 | Walt Disney Pictures | false | false |
| 15 | - | Taking Woodstock | $3,744 | - | 2 | - | $1,872 | $3,744 | 1 | M Pictures | true | false |
| 16 | 11 | Kafû o machiwabite | $1,322 | -25.6% | 1 | - | $1,322 | $3,911 | 2 | Mongkol Major | false | false |
| 17 | 9 | Oh My Ghosts! | $940 | -89.4% | 5 | -13 | $188 | $1,685,783 | 5 | Pranakorn Films | false | false |
| 18 | - | The Echo | $940 | - | 1 | - | $940 | $940 | 1 | M Pictures | true | false |
| 19 | 13 | Harry Potter and the Half-Blood Prince | $761 | -30.2% | 1 | - | $761 | $4,153,135 | 16 | Warner Bros. | false | false |
| 20 | 12 | Bad Lieutenant: Port of Call New Orleans | $343 | -72.7% | 2 | -2 | $171 | $28,544 | 4 | N/A | false | false |
| 21 | 17 | Transformers: Revenge of the Fallen | $333 | +7.8% | 1 | - | $333 | $6,033,516 | 19 | United International Pictures | false | false |
| 22 | 14 | Broken Embraces | $215 | -59.7% | 1 | - | $215 | $7,819 | 5 | M Pictures | false | false |
| 23 | 19 | 9 | $113 | -43.8% | 1 | -1 | $113 | $20,774 | 8 | M Pictures | false | false |
