| Date | R | Home v Away | - |
|---|
Dome FC
Bangkok United II
Samut Prakan FC
Look Isan FC
Chanthaburi FC
PTU Pathum Thani FC
Sisaket United
Bangkok Christian College
Thonburi University
Hua Hin City
Buriram United Reserves
Saimit Kabin United
Assumption United
Air Force Robinson FC
North Bangkok University
North Bangkok FC
Ratchaburi FC Reserves
Looktabfah FC
Pathum Thani Seeker
Bangkok Glass Reserves
Singburi FC
Uttaradit FC
Phan Thong FC
Muang Loei United
Surin City FC
Chiangrai Utd Reserves
Pattani FC
Nan FC
Kopoon Warrior
Samut Songkhram
Phitsanulok FC
Yala FC
Suphanburi FC Reserves
Surat Thani
Kalasin FC
Yasothon FC
BTU United
Nakhon Nayok FC
Nonthaburi FC
Royal Thai Army
Ayutthaya FC
Patum Thani Utd
Mukdahan Lamkhong
Chonburi II
Pattaya FC
Chumphon FC
Prachinburi United
Paknampho NSRU
Nakhon Pathom FC
Nakhon Sawan
Thai League 4 (Thai: ไทยลีก 4), commonly known as the T4, was the fourth level association football league in Thailand. In 2009, it was divided into five groups by geographic region. Each group contained 16 clubs except for the Southern Region group which contained 13 clubs. It was sponsored by AIS and therefore officially known as the AIS Regional League Division 2. In 2016, Khor Royal Cup became a trophy for Regional League Division 2.
In 2017, Football Association of Thailand rebranded the league to Thai League 4.