| | First party | Second party | Third party |
|---|
| | | | | | Leader | Bhichai Rattakul | Pramarn Adireksarn | Siddhi Savetsila |
|---|
| Party | Democrat | Chart Thai | Social Action |
|---|
| Last election | 15.63%, 56 seats | 23.81%, 73 seats | 26.78%, 92 seats |
|---|
| Seats won | 100 | 63 | 51 |
|---|
| Seat change | 44 | 10 | 41 |
|---|
| Popular vote | 8,477,701 | 6,495,370 | 4,560,650 |
|---|
| Percentage | 22.52% | 17.26% | 12.12% |
|---|
| | | Fourth party | Fifth party | Sixth party |
|---|
| | | | RTP | | Leader | Kriangsak Chamanan | Samak Sundaravej | Narong Wongwan |
|---|
| Party | National Democrat | Thai Citizen | Ruam Thai |
|---|
| Last election | 8.06%, 15 seats | 9.03%, 36 seats | – |
|---|
| Seats won | 38 | 24 | 19 |
|---|
| Seat change | 23 | 12 | New |
|---|
| Popular vote | 3,814,651 | 2,395,795 | 1,658,812 |
|---|
| Percentage | 10.13% | 6.94% | 4.41% |
|---|
| | | Seventh party | Eighth party |
|---|
| | | | | Leader | Boonchu Rojanastien | Uthai Pimchaichon |
|---|
| Party | Community Action | Progress |
|---|
| Last election | – | 1.28%, 3 seats |
|---|
| Seats won | 15 | 9 |
|---|
| Seat change | New | 6 |
|---|
| Popular vote | 2,268,346 | 1,998,721 |
|---|
| Percentage | 6.03% | 5.31% |
|---|
|