| Season: | 2013 |
| League Topscorer: |  Leandro Luz(24 Goals) |
| Highest Attendance: | 23,844 Nakhon Ratchasima 3-2 Khonkaen (22 September 2013) |
| Lowest Attendance: | 107 Rayong United 1-4 Saraburi (19 October 2013) |
| Attendance: | 785,443 |
| Matches: | 306 |
| Total Goals: | 831 |
| Nextseason: | 2014 |
2013 Thai League Division 1 (known as Yamaha League 1 for sponsorship reasons) is the 16th season of the League since its establishment in 1997. It is the feeder league for the Thai Premier League. A total of 18 teams will compete in the league this season.
Promoted to Thai Premier League
Relegated to Regional League Division 2
Relegated from Thai Premier League
Promoted from Regional League Division 2
Note: Flags indicate national team as has been defined under FIFA eligibility rules. Players may hold more than one non-FIFA nationality.
| Team | Shirt sponsor | Kit manufacturer | Captain | Head coach | |
|---|---|---|---|---|---|
| Air Force AVIA | Group Avia | Kela |  Narasak Boonkleng | ||
| Ayutthaya | Gulf | Poom Planet | Sittichai Traisilp | Phil Stubbins | |
| Bangkok | M2F | FBT | Jakkrapong Yaito | Royter Moreira | |
| BBCU | 3BB | Ego Sports | Salahudin Arware | Worachai Surinsirirat | |
| Khonkean | Leo Beer | Grand Sport | Supakorn Karada | Pichet Suphomueng | |
| Krabi | Thai AirAsia | Diadora | Thaweephong Ja-reanroob | Paiboon Lertvimonrut | |
| Nakhon Pathom | JC | Kool | Jarupong Sangapong | Vimol Jankam | |
| Nakhon Ratchasima | Mazda | Puma | Anon Boonsukco |  Sugao Kambe | |
| Beyond Resort | Grand Sport |  Sylvestre Nenebi Tra | Stefano Cugurra Teco | ||
| PTT Rayong | PTT Group | Grand Sport | Yuttana Chaikaew | Nopporn Eksrattra | |
| Gulf | FBT | Saifon Kasemsang | Apichart Mosika | ||
| Rayong United | Carabao Dang | Lotto | Suradej Saotaisong | Varit Boonsripittayanon | |
| Saraburi | Gulf | Deffo | Manus Tudsuntorn | Totchtawan Sripan | |
| Siam Navy | Group Avia | FBT | Kusoel Pengpol | Arjhan Srong-ngamsub | |
| Singhtarua | Singha | Grand Sport | Kiatjarern Ruangparn | Dusit Chalermsan | |
| Sriracha | Suzuki | FBT | Umpai Mutaporn | Trongyod Klinsrisook | |
| Trat | CP | Tamudo | Rattaporn Saetan | Harnarong Chunhakunakorn | |
| TTM Lopburi | TTM | Mawin | Somchai Hun-ieng | Wisoon Wichaya |
The number of foreign players is restricted to seven per DIV1 team, including a slot for a player from AFC countries. A team can use four foreign players on the field in each game, including at least one player from the AFC country.
.[20]
| Rank | Player | Club | Goals | |
|---|---|---|---|---|
| 1 | Leandro Oliveira | Singhtarua | 24 | |
| 2 | Lee Tuck | Bangkok | 23 | |
| 3 |  Matias Recio | Khonkaen | 19 | |
| 4 | Valci Júnior | Rayong United(8 Goals) Krabi(9 Goals) | 17 | |
| 5 | Kouassi Yao Hermann | Air Force United | 16 | |
 Olof Hvidén-Watson | Bangkok | 16 | ||
| 7 |  Berlin Ndebe-Nlome | Sriracha | 15 | |
| Yusuke Kato | Nakhon Ratchasima | 15 | ||
| 9 | Bernard Doumbia | Saraburi | 14 | |
| 10 | Promphong Kransumrong | Nakhon Ratchasima | 13 |
| Player | For ! | Against | Result | Date | |
|---|---|---|---|---|---|
| BBCU | 3–1 | ||||
| Rayong United | 3–1 | ||||
| Nakhon Ratchasima | 5–0 | ||||
| Bangkok | 7–3 | ||||
| Trat | 3–3 | ||||
| Bangkok | 4–1 | ||||
| Singhtarua | 4–2 |
Erikson Noguchipinto Phaisan Pona Sarach YooyenThe Coach of the Year was awarded to Narasak Boonkleng.
The Golden Boot was awarded to Leandro de Oliveira da Luz.
Antonio Vega
Samuel Kwaku
Amr Shaaban
Andre Houma
Kordell Samuel
Abdel Abzizou
Souleymame
