| Rank | LW | Release
| Gross | %± LW | Theaters | Change | Average | Total Gross | Weeks | Distributor
| New This Week
| Estimated
|
|---|
| 1 | - | Rahtree Reborn | $405,435 | - | 93 | - | $4,359 | $405,435 | 1 | Mongkol Film Company | true | false |
| 2 | 1 | Fast & Furious | $360,031 | -68.3% | 94 | -63 | $3,830 | $1,963,664 | 2 | United International Pictures | false | false |
| 3 | - | Race to Witch Mountain | $228,195 | - | 52 | - | $4,388 | $228,195 | 1 | Walt Disney Pictures | true | false |
| 4 | - | Monsters vs. Aliens | $155,722 | - | 53 | - | $2,938 | $155,722 | 1 | United International Pictures | true | false |
| 5 | 2 | Elephant Kingdom | $137,871 | -61% | 60 | -33 | $2,297 | $1,596,514 | 3 | N/A | false | false |
| 6 | 3 | Sassy Player | $80,397 | -65.4% | 60 | +1 | $1,339 | $434,301 | 2 | Pranakorn Films | false | false |
| 7 | 4 | Knowing | $55,291 | -72.1% | 49 | -25 | $1,128 | $1,175,613 | 3 | Mongkol Major | false | false |
| 8 | 5 | Shinjuku Incident | $47,220 | -61.4% | 48 | -12 | $983 | $228,752 | 2 | Mongkol Major | false | false |
| 9 | - | Last Chance Harvey | $5,289 | - | 2 | - | $2,644 | $5,289 | 1 | M Pictures | true | false |
| 10 | 10 | 20th Century Boys 2: The Last Hope | $2,906 | -11.5% | 2 | -1 | $1,453 | $17,002 | 3 | M Pictures | false | false |
| 11 | 11 | Slumdog Millionaire | $1,738 | -45.7% | 1 | - | $1,738 | $80,199 | 6 | N/A | false | false |
| 12 | 7 | New in Town | $1,549 | -66% | 3 | -3 | $516 | $71,327 | 4 | N/A | false | false |
| 13 | 12 | Seven Pounds | $1,117 | -62.7% | 2 | -2 | $558 | $70,793 | 4 | Sony Pictures Releasing | false | false |
| 14 | 9 | The Great Buck Howard | $1,051 | -68.7% | 1 | - | $1,051 | $12,049 | 3 | Mongkol Major | false | false |
| 15 | 13 | The Pink Panther 2 | $629 | -67.3% | 1 | - | $629 | $39,238 | 7 | Sony Pictures Releasing | false | false |
| 16 | 6 | Best of Times | $421 | -95.3% | 1 | -22 | $421 | $1,394,100 | 6 | GMM Tai Hub (GTH) | false | false |
| 17 | 17 | The Reader | $231 | -36.5% | 1 | - | $231 | $84,739 | 9 | M Pictures | false | false |
| 18 | 18 | Milk | $217 | -39.9% | 1 | - | $217 | $48,950 | 7 | M Pictures | false | false |
| 19 | 19 | Doubt | $127 | -55% | 1 | - | $127 | $13,609 | 8 | Walt Disney Pictures | false | false |
| 20 | 21 | The Wrestler | $102 | -36.2% | 1 | - | $102 | $21,817 | 8 | M Pictures | false | false |
