Updated to match(es) played on 26 August 2018. Source: Thai League 4 Rules for classification: 1) Points; 2) Head-to-head points; 3) Overall goals difference; 4) Overall goals scored; 5) Fair play points; 6) Play-off without extra time;).[8] (C) Champions; (Q) Qualified for the phase indicated; (R) Relegated Notes:
^ abPhitsanulok head-to-head record equaluate to Nakhon Mae Sot United. Phitsanulok ahead on Goal Different; Phitsanulok +10, Nakhon Mae Sot United +5
^They have finished lower than 6th place. So, they could not compete in T4 for one season by the rules of FA Thailand.[7]
Updated to match(es) played on 1 July 2018. Source: Thai League 4 Legend: Blue = home team win; Yellow = draw; Red = away team win.
Results 3rd match for each team
In the third leg, the winner on head-to-head result of the first and the second leg will be home team. If head-to-head result are tie, must to find the home team from head-to-head goals different. If all of head-to-head still tie, must to find the home team from penalty kickoff on the end of each second leg match (This penalty kickoff don't bring to calculate points on league table, it's only the process to find the home team on third leg).
Source:Thai League 4Archived 2018-06-12 at the Wayback MachineNote: Unk.1 Some error of T4 official match report 8 July 2018 (Uttaradit 4–1 Nakhon Mae Sot United).[10] Unk.2 Some error of T4 official match report 15 July 2018 (Uttaradit 3–2 Nakhon Sawan).[11]