Nakhon Si Thammarat

Early years

The club was founded in 2014 under the name Ratchaphruek Muangnont United Football Club located in Pak Kret, Nonthaburi. They used Potinimitwittayakom school's stadium to be their ground. Then, during 2014 season, they relocated to Thanyaburi, Pathum Thani and used Queen Sirikit 60th Anniversary Stadium to be their ground. After that, in 2015, season they relocated to Phutthamonthon, Nakhon Pathom and used Rajamangala University of Technology Rattanakosin Salaya campus's stadium to be their ground.

2016, Renaming

In 2016, the club's boards have renamed this club to Rajapruk University Football Club. Then, relocated to Nong Khaem, Bangkok and used Thonburi University Stadium to be their ground.

2017, Takeover and merger with Nakhon Si Heritage football club

In 2017, this club has taken over by Nakhon Si Heritage's boards and merged it with Nakhon Si Heritage a football club that played in 2016 Regional League Division 2 Southern region. Then, renamed it to Nakhon Si Thammarat Unity Football Club and relocated to Ron Phibun, Nakhon Si Thammarat. They used Nakhon Si Thammarat PAO Stadium to be their ground.

2018, Takeover and merger with Muangkhon United football club

In 2018, this club has taken over by Muangkhon United's boards and merged it with Muangkhon United a football club that played in 2017 Thailand Amateur League Southern region. Then, renamed it to WU Nakhon Si United Football Club and relocated to Tha Sala, Nakhon Si Thammarat. They used Walailak University Stadium to be their ground.

2019, End of contract with Walailak University

In 2019, this club has end of contract with Walailak University and renamed to Nakhon Si United. For this reason, they have removed the text WU out from their logo in this season.