2015 Thai Division 1 League

2015 Thai League Division 1 (known as Yamaha League-1 for sponsorship reasons) was the 18th season of the League since its establishment in 1997. It is the feeder league for the Thai Premier League. A total of 20 teams competed in the league this season.

From Division 1
Promoted to Thai Premier League
 * Nakhon Ratchasima Mazda
 * Saraburi
 * Navy

Relegated to Regional League Division 2
 * Roi Et United
 * Phitsanulok
 * Khonkaen
 * Sriracha Ban Bueng

To Division 1
Relegated from Thai Premier League
 * Police United
 * PTT Rayong
 * Songkhla United
 * Air Force Central
 * GSE Samut Songkhram

Promoted from Regional League Division 2
 * Prachuap
 * Thai Honda
 * Sukhothai
 * Phichit

Personnel and sponsoring
Note: Flags indicate national team as has been defined under FIFA eligibility rules. Players may hold more than one non-FIFA nationality.

Foreign players
The number of foreign players is restricted to five per TPL 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.

Top scorers

 * As of 12 December 2015.