as part of the Thesaphiban administrative reform, Mueang Nakhon Chai Si became the capital city of Monthon Nakhon Chai Si. Later, after the system was abolished, Mueang Nakhon Chai Si was downgraded to a district under Nakhon Pathom province.

The name Nakhon Chai Si was given in remembrance of King Chaiyasiri of the Singhanavati Kingdom, who was the son of King Phrom and believed by the people of Ayutthaya