1876
| August 18, 1908
| Mountain Province was established with Amburayan, Apayao, Benguet, Bontoc, Ifugao, Kalinga, and Lepanto as sub-provinces.
| 2711
| Mar 10, 1917
| established most of the modern-day provinces of the Philippines.
| | Post-Commonwealth
|
|---|
14
| Sep 7, 1946
| changed the name of the province of Tayabas to Quezon.
| 333
| Jul 17, 1948
| declared Quezon City the capital of the Philippines.
| 537
| Jun 16, 1959
| extended the area of Quezon City.
| 2141
| Apr 8, 1959
| made Biliran a sub-province of Leyte.
| 4695
| June 18, 1966
| formed the provinces of Kalinga-Apayao, Benguet, Ifugao, and Mountain Province from the earlier Mountain Province
| 6396
| Sep 17, 1971
| made Siquijor an independent province.
| 6430
| Jun 17, 1972
| changed the name of the province of Davao del Norte to Davao.
| 6734
| Aug 1, 1989
| created the Autonomous Region in Muslim Mindanao (ARMM), which was officially inaugurated on November 6, 1990 in Cotabato City.
| 6766
| Oct 23, 1989
| provided for an Organic Act for the Cordillera Administrative Region (CAR). It mandates the creation of an autonomous government to be headed by a Regional Governor. It creates a Regional Assembly that will enact laws of regional application and a regional judiciary composed of a supreme court and lower courts.
| 7160
| May 11, 1992
| made Biliran an independent province. Biliran was previously a sub-province of Leyte.
| 7878
| Feb 14, 1995
| divided Kalinga-Apayao into Kalinga and Apayao provinces.
| 8223
| Dec 8, 1996
| converted the municipality of Marikina, Metro Manila into a city.
| 8438
| Dec 22, 1997
| created the Cordillera Autonomous Region. A plebiscite, held on March 9, 1998 to ratify the bill, was held and invalidated the act. See Cordillera Administrative Region.
| 8470
| Jan 31, 1998
| split the province of Davao into two, creating the province of Compostela Valley.
| 8471
| Jan 31, 1998
| created the Island Garden City of Samal in Davao province by combining the municipalities of Samal, Babak, and Kaputian.
| 8472
| Jan 31, 1998
| converted the municipality of Tagum, the capital of Davao, into a city.
| 8473
| Jan 31, 1998
| created the municipality of Braulio E. Dujali, Davao out of several barangays in Panabo and Carmen.
| 8491
| Feby 12, 1998
| prescribed the code of the national flag, anthem, motto, coat-of-arms and other heraldic items and devices of the Philippines.
| 8535
| Feb 23, 1998
| provided for the creation of the City of Novaliches comprising the 15 northernmost barangays of Quezon City. However, in the succeeding plebiscite on October 23, 1999, an overwhelming majority of Quezon City residents voted “no” to the bill.
| 9015
| Mar 5, 2001
| converted the municipality of Panabo, Davao into a city.
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