The winners and runners-up from each regions will play in playoff matches in the tournament at the end of a season.

Then the Sports Authority of Thailand proposed a new league which includes teams from different provinces.

The rest of the teams playing in Pro League 2 divided into 5 geographical regions.

The winners and runners-up from each regions will play in the tournament format at the end of the season.

* The teams in bold typeface are promoted to Thailand Division 2 League.