Ayutthaya FC

Sena Municipality

Sena Municipality Football Club was established in 2007. They are the local football team of Sena district, Ayutthaya and they played in the "Royal football Cup". In 2008, Sena Municipality took part in the Khor Royal Cup. They were in round of 16 before losing to Assumption College Sriracha football club 2–3. In 2008–09, they again reached the round of 16 before losing to Hua-Hin Municipality 0–1.

In 2013, Sena Municipality reached the semi-final. They lost to Korat United but earned promotion to the Khǒr Royal Cup. In 2014, Sena Municipality football club played in Khǒr Royal Cup for the first time. In 2015, Sena Municipality advanced to the semi-final. Despite being defeated by Institute of Physical Education Samut Sakhon, they gained promotion.

As Ayutthaya United

After Sena Municipality got promoted to the regional division, they changed the club name to Ayutthaya United. The club played their home matches at Senabodee Stadium. On 19 March 2016, Ayutthaya United played their first match at Nakhon Sawan Province Stadium with Nakhon Sawan. Ayutthaya United won 1–0 by the goal of Rungroj Sawangsri. On 7 December 2016, Ayutthaya Warrior merged with Ayutthaya United.

First Division

On 26 April 2025, Ayutthaya United secured promotion to Thai League 1 for the first time in their history, after defeating Bangkok FC 5–1 and finishing the 2024–25 Thai League 2 season as runners-up.