Modify the format of the regional government, in the reign of his Majesty King Bhumibol Adulyadej. Oldest city of Chiang Mai, so change as northwestern province and became a province in the reign of King Rama VII.
A modified form of the provincial government in the reign of King. Rama V. The city has changed as West Riding. And became a province during the reign of King Rama VII.
Modified forms of government authority in modern, H.M. King Rama V The city is changed as a มณฑลพายัพ. And became the province during the reign of King Rama VII.