| Name of Town | Date of Foundation | Basis / Source |
| Natonin, Mountain Province | 25 June 1963 | E.O. 42 s. of 1963 |
In the 1918 Census of the Philippine Islands, Natonin was classified as a township of the sub-province of Bontoc. Act No. 2711 or the 1917 Administrative Code of the Philippines, enacted on 10 March 1917, and the 1920 Report of the Governor-General of the Philippine Islands, cited Natonin as a municipal district.
Nonetheless, as indicated in Chapter 1, Article I, Section 2 of Act No. 2711, the term “municipality” refers to a municipality proper and does not include a township or municipal district. During the American Period, certain areas were designated as municipal districts before becoming actual municipalities.
Natonin was elevated to the status of a municipality by virtue of Executive Order No. 42, enacted on 25 June 1963.
References:
Administrative Code of the Philippine Islands of 1917. Manila: Bureau of Printing, 1917.
Census of the Philippine Islands: Taken Under the Direction of the Philippine Legislature in the Year 1918. Manila: Bureau of Printing, 1921.
Macapagal, D. (1963). Executive Order No. 42: Declaring Certain Municipal Districts in the Philippines as Municipalities. Official Gazette of the Republic of the Philippines, 59 (27), 4185-4186.
Report of the Governor General Philippine Islands: Message From This President of the United States Transmitting Report of the Governor General of the Philippine Islands, Together With Reports of the Heads of the Departments of the Philippine Government, for the Fiscal Year Ended December 31, 1920. Washington: Government Printing Office, 1923.
