| Season: | 2007 |
| Relegated: | Narathiwat Air Force Training College Sakon Nakhon Bangkok Bravo Ratchaburi Bangkok North Central Association Nakhon Ratchasima Sisaket Cha Choeng Sao Royal Thai Marine College |
| Nextseason: | 2008 |
The 2007 Thailand League Division 1 was played in two groups of 12 teams. The top two teams of each group were promoted and the bottom five teams of each group were relegated as the Thai football league system was in the process of being restructured.
Customs Department were crowned champions after winning the end of season championship finals played between the promoted sides.
| Team | Location | Stadium[1] [2] [3] [4] | Capacity |
|---|---|---|---|
| Air Force Training College | Pathum Thani | Thupatemee Stadium | 25,000 |
| 72nd Anniversary Stadium (Min Buri) | 10,000 | ||
| Customs Depart | Kasem Bundit University Stadium (Rom Klao) | 2,000 | |
| Coke-Bangpra | Chonburi | Coke-Jamlong Smuewong Stadium | ? |
| Khonkaen | Khonkaen | Khon Kaen Province Stadium | ? |
| Narathiwat | Narathiwat Municipal Stadium | ? | |
| Raj-Vithi | Nong Chok, Bangkok | BEC Tero Sasana Nong Chok Stadium | 5,000 |
| Rattana Bundit | Bang Kapi, Bangkok | RBAC University Stadium | 1,000 |
| Ratchaburi | Ratchaburi | 10,000 | |
| Sakon Nakhon | Sakon Nakhon | Sakolrajwittayanukul School | ? |
| Surat Thani | Surat Thani | Surat Thani Province Stadium | 10,000 |
| Thai Airways | Lat Krabang, Bangkok | King Mongkut's Institute of Technology Ladkrabang Stadium | ? |
| Team | Location | Stadium[5] [6] | Capacity |
|---|---|---|---|
| Bangkok North Central ASSN | Bang Kapi, Bangkok | Klong Chan Sports Center | ? |
| Chachoengsao | Chachoengsao | 10,000 | |
| Chula-Sinthana | Bangkok | Chulalongkorn University Sports Stadium | 15,000 |
| Chanthaburi | Chanthaburi | Chanthaburi Province Stadium | 5,000 |
| Nakhon Sawan | Nakhon Sawan | Nakhon Sawan Province Stadium | ? |
| Nakhon Ratchasima | Pak Chong Municipal Stadium | ? | |
| Phitsanulok | Phitsanulok | Pibulsongkram Rajabhat Stadium | ? |
| Royal Thai Marine | Sattahip, Chonburi | Sattahip Navy Stadium | 12,500 |
| Royal Thai Air Force | Pathum Thani | Thupatemee Stadium | 25,000 |
| Samut Songkhram | Samut Songkhram | Samut Songkhram Province Stadium | 5,000 |
| Sriracha | Chonburi | Princess Sirindhorn Stadium(Assumption College Sriracha Stadium) | ? |
| Sisaket | Sisaket | Sisaket Province Stadium | 10,000 |