| 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
| Team | Location | Stadium | Capacity | ||
|---|---|---|---|---|---|
| Air Force AVIA | Pathum Thani | Thupatemee Stadium | 25,000 | [2] | |
| Ayutthaya | 6,000 | [3] | |||
| Bangkok | Thung Khru, Bangkok | 72-years Anniversary Stadium (Bang Mod) | 8,000 | [4] | |
| Bangkok | Thai Army Sports Stadium | 20,000 | [5] | ||
| Khonkaen | Khonkaen | Khon Kaen Province Stadium | 8,500 | [6] | |
| Krabi | Krabi | Krabi Province Stadium | 6,000 | [7] | |
| Nakhon Pathom United | Nakhon Pathom | Nakhon Pathom Municipality Sport School Stadium | 2,141 | [8] | |
| Nakhon Ratchasima | Nakhon Ratchasima | 80th Birthday Stadium | 20,141 | [9] | |
| Phuket | Surakul Stadium | 15,000 | [10] | ||
| PTT Rayong | Rayong | PTT Stadium | 17,000 | [11] | |
| Rayong | 7,000 | [12] | |||
| Rayong United | Rayong | Rayong Province Stadium | 7,000 | [13] | |
| Gulf Saraburi | Saraburi | Saraburi Provincial Administrative Organization Stadium | 10,000 | [14] | |
| Siam Navy | Chonburi | 12,500 | [15] | ||
| Singhtarua | Bangkok | PAT Stadium | 12,308 | [16] | |
| Sriracha Suzuki | Chonburi | Suzuki Stadium | 10,207 | [17] | |
| Trat | Trat | Trat Province Stadium | 4,000 | [18] | |
| TTM | Lak Si, Bangkok | Boonyachinda Stadium | 3,500 | [19] |
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.
| Club | Player 1 | Player 2 | Player 3 | Player 4 | Player 5 | Player 6 | Asian Player |
|---|---|---|---|---|---|---|---|
| Air Force AVIA |  David Bayiha |  David Le Bras | Kouassi Yao Hermann | Kobenan N'Guatta |  Julius Oiboh |  Zezinando | Jun Uruno |
| Ayutthaya | Daniel Melo |  Antonio Vega | Justin Herve | Malick Ndape | Chun Boas | Chang Seung-Weon | |
| Bangkok | Antonio Pina | Jean Marc | Lee Tuck |  Samuel Kwaku | Yuki Bamba | ||
| BBCU | Eduardo Salles | Marcio Da Silva | Bouba Abbo | Fofana Abib |  Moussa Sylla | Kim Woo-Chul | Kim Sung-Yeon |
| Khonkaen |  Matias Recio | Christ Mbondi |  Amr Shaaban | Shogo Nakahara | Yusuke Nakatani | Yuto Nagasaka |  Li Xiang |
| Krabi | Valci Júnior |  Michel Gnonka | John Mary | Anayo Cosmas |  Bojan Mamić | Ju Myeong-Gyu | Soukaphone |
| Nakhon Pathom | Paulo Renato | Pierre Sylvain | Lesley Ablorh |  Andre Houma |  Kordell Samuel | Yoo Jae-Min | Cho Kwang-Hoon |
| Nakhon Ratchasima | Douglas Lopes | Munze Ulrich |  Noah Chivuta | Satoshi Nagano | Shota Koide | Kim Song-yong | Yusuke Kato |
| Phuket | Dudu | Cristian Alex | Ludovick Takam |  Giorgi Tsimakuridze | Nenebi | Yusuke Sato | |
| PTT Rayong | Amadou Ouattara | Baba Ouattara |  Jozef Tirer | Miroslav Tóth | Terukazu Tanaka | Yeon Gi-sung | Noguchi Pinto |
| Rayong | Mario Da Silva | Thierry Tchobe | Tommy Falue | Walther Henri |  Abdel Abzizou | Choi Kun-Sik | Yagin Boas |
| Rayong United | Marcio Santos | Ryohei Maeda | Kwon Dae-hee | Byeon Seung-Won | |||
| Saraburi | Mario Neto | Bernard Doumbia | Valery Djomon |  Errol Stevens | Yusuke Murayama | Dai Min-Joo | |
| Siam Navy | Rafael Moretto | Diomande Adama |  Souleymame | Seiya Kojima | |||
| Singhtarua | Leandro Luz | Ali Diarra |  Mathias Christen | Amara Jerry | Ivan Petrović |  Patrick Reichelt | Ri Myong-Jun |
| Sriracha | Diego Pishinin | Ratinho | Sérgio | Berlin |  Ivan Bošković | Jun Kochi |  Irfan Bachdim |
| Trat | Douglas Cobo | Woukoue Raymond |  Franklin Anzité | Almamy Sylla | Labi Kassiaty | ||
| TTM Lopburi | Didier Sohna | Jacques Bertin | Lassana Sidibe | Alfred Emoefe | Shota Wada | Joo Jin-Hak | Yoo Hong-Youl |
.[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.