The 2026–27 Thai League 3 Southern Region was part of the 2026–27 Thai League 3 Regional Stage, consisting of 10 clubs located in the southern region of Thailand. The season commenced on 19 September 2026, with clubs competing in a round-robin format featuring home-and-away matches. The Regional Stage concluded on 21 March 2027, with the top two clubs advancing to the National Championship Stage, while the bottom-placed club was relegated to the Thailand Semi-pro League for the following season.
Seasonal Changes The 2026–27 Thai League 3 Southern Region retains 10 clubs, unchanged from the previous season. BYD Auto remains the title sponsor, with matches broadcast on AIS Play. The criteria for determining the standings have also been revised, with overall goal difference replacing head-to-head results as the primary tiebreaker.
Relegation from Thai League 2 Nakhon Si United was relegated to the 2026–27 Thai League 3 Southern Region after finishing second-bottom of the 2025–26 Thai League 2.
Promotions from Thailand Semi-pro League The following two clubs were promoted from the 2026 Thailand Semi-pro League to the 2026–27 Thai League 3 Southern Region: Nara – promoted as regional champions. Yala City – promoted as runners-up under a special quota.
Promotion to Thai League 2 PT Satun was promoted to the 2026–27 Thai League 2 as the third-place of the 2025–26 Thai League 3 National Championship Stage.
Relegation to Thailand Semi-pro League The following two clubs were relegated from the 2025–26 Thai League 3 Southern Region to the 2027 Thailand Semi-pro League: Nara United, the Southern Region champions and national champions of the 2025–26 Thai League 3, failed to obtain a Thai League 2 club licence after qualifying for promotion. The club also failed to obtain a Thai League 3 club licence and was therefore ineligible to participate in either professional division, resulting in its relegation to the Thailand Semi-pro League. Krabi was relegated to the 2027 Thailand Semi-pro League after finishing bottom of the 2025–26 Thai League 3 Southern Region.
Club name and logo changes Ranong United was renamed Ranong PJ United, with "PJ" added between "RANONG" and "UTD" on the club logo.
Teams Number of teams by province PositionProvinceNumberTeams12PSU Surat Thani City and Samui United2Yala and Yala City31Chumphon United1Nakhon Si United1Nara1Phuket Andaman1Ranong PJ United1Muang Trang United
Stadiums and locations
Team Location Stadium CoordinatesStadium of Thailand National Sports University, Chumphon CampusMuang Trang StadiumNakhon Si Thammarat Provincial StadiumNarathiwat PAO StadiumSurakul StadiumStadium of Prince of Songkla University, Surat Thani CampusRanong Provincial StadiumKo Samui Municipal International StadiumStadium of Yala Rajabhat UniversityStadium of Thailand National Sports University, Yala Campus
Road travel distances between clubs
Foreign players A T3 team can register 3 foreign players from around the world. A team can field 3 foreign players in each game.
League table Standings
Positions by round
Results by round
Results
References
External links Official website of Thai League