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.

The number of foreign players is restricted to seven per DIV1 team, including a slot for a player from AFC countries.

The Coach of the Year was awarded to Narasak Boonkleng.

The Golden Boot was awarded to Leandro de Oliveira da Luz.