Royal Thai Army Football Club (Thai: สโมสรฟุตบอลทหารบก) is a Thailand football club under the stewardship of Royal Thai Army based in Bangkok. The team plays their home matches at Thai Army Sports Stadium. The club is currently playing in the Thai League 3 Bangkok metropolitan region.
Prior to 2015 the club was called "Army Welfare Department F.C.". After it was promoted from winner Khǒr Royal Cup to Regional League Division 2, the club changed its name to Royal Thai Army F.C..
In 2022, Royal Thai Army competed in the Thai League 3 for the 2022–23 season. It is their 8th season in the professional league. The club started the season with a 0–1 home defeat to Royal Thai Air Force and they ended the season with a 1–3 away defeat to Royal Thai Air Force. The club has finished 9th place in the league of the Bangkok metropolitan region.