The legislative districts of Isabela are the representations of the province of Isabela and the independent component city of Santiago in the various national legislatures of the Philippines. The province and the city are currently represented in the lower house of the Congress of the Philippines through their first, second, third, fourth, fifth, and sixth congressional districts.
History The province was represented as a lone legislative district until 1972. It was part of the representation of Region II from 1978 to 1984, and from 1984 to 1986, it elected 3 assemblymen at-large. In 1986, it was redistricted into four legislative districts.
On September 27, 2018, President Rodrigo Duterte signed Republic Act No. 11080, increasing the legislative districts from four to six and reapportioned the district assignments of cities and municipalities.
Current districts The province was last redistricted on September 27, 2018, where the fifth and sixth districts were apportioned. All six representatives are part of the majority bloc in the 20th Congress.
Political parties
+Legislative districts and representatives of IsabelaDistrictCurrent RepresentativePartyConstituent LGUsPopulation (2020)AreaMapImageName1st Antonio T. Albano(since 2019)Cabagan PFP 399,196 4519.71 km² 2nd Ed Christopher S. Go(since 2019)San Mariano PFP 199,903 2890.49 km² 3rd Ian Paul L. Dy(since 2019)Alicia Lakas 282,027 686.27 km² 4th Joseph S. Tan(since 2022)Santiago PFP 268,602 1922.44 km² 5th Faustino Michael Carlos T. Dy III(since 2019)San Manuel Lakas 267,550 981.43 km² 6th Faustino D. Dy III(since 2025)Cauayan PFP 279,772 1414.59 km²
Historical districts
Four districts (1987–2019)
1st district
City: Ilagan (became a city in 2012) Municipalities: Cabagan, Delfin Albano, Divilacan, Maconacon, Palanan, San Pablo, Santa Maria, Santo Tomas, Tumauini
Period Representative 8th Congress1987–1992 Rodolfo B. Albano, Jr. 9th Congress1992–1995 10th Congress1995–1998 11th Congress1998–2001 Rodolfo T. Albano III 12th Congress2001–2004 Rodolfo B. Albano, Jr. 13th Congress2004–2007 Rodolfo T. Albano III 14th Congress2007–2010 15th Congress2010–2013 Rodolfo B. Albano, Jr. 16th Congress2013–2016 Rodolfo T. Albano III 17th Congress2016–2019
2nd district
Municipalities: Aurora, Benito Soliven, Burgos, Gamu, Mallig, Naguilian, Quezon, Quirino, Roxas, San Manuel, San Mariano
Period Representative 8th Congress1987–1992 Simplicio B. Domingo, Jr. 9th Congress1992–1995 Faustino S. Dy, Jr. 10th Congress1995–1998 11th Congress1998–2001 12th Congress2001–2004 Edwin C. Uy 13th Congress2004–2007 14th Congress2007–2010 15th Congress2010–2013 Ana Cristina S. Go 16th Congress2013–2016 17th Congress2016–2019
3rd district
City: Cauayan (became a city in 2001) Municipalities: Alicia, Angadanan, Cabatuan, Luna, Reina Mercedes, San Guillermo, San Mateo
Period Representative 8th Congress1987–1992 Santiago P. Respicio 9th Congress1992–1995 10th Congress1995–1998 11th Congress1998–2001 Ramon M. Reyes 12th Congress2001–2004 Faustino G. Dy III 13th Congress2004–2007 14th Congress2007–2010 15th Congress2010–2013 Napoleon S. Dy 16th Congress2013–2016 17th Congress2016–2019
4th district
City: Santiago (became a city in 1994) Municipalities: Cordon, Dinapigue, Echague, Jones, Ramon, San Agustin, San Isidro
Period Representative 8th Congress1987–1992 Antonio M. Abaya 9th Congress1992–1995 10th Congress1995–1998 11th Congress1998–2001 Heherson T. Alvarez 12th Congress2001–2004 Antonio M. Abaya Giorgidi B. Aggabao 13th Congress2004–2007 Anthony Miranda 14th Congress2007–2010 Giorgidi B. Aggabao 15th Congress2010–2013 16th Congress2013–2016 17th Congress2016–2019 Ma. Lourdes R. Aggabao Notes
Lone district (defunct)
Period Representative 1st Philippine Legislature1907–1909 Nicasio Claravall Dimas Guzman 2nd Philippine Legislature1909–1912 Eliseo Claravall 3rd Philippine Legislature1912–1916 4th Philippine Legislature1916–1919 Mauro Verzosa 5th Philippine Legislature1919–1922 Miguel Binag 6th Philippine Legislature1922–1925 Tolentino Verzosa 7th Philippine Legislature1925–1928 Manuel Nieto 8th Philippine Legislature1928–1931 Pascual Paguirigan 9th Philippine Legislature1931–1934 Silvestre Macutay 10th Philippine Legislature1934–1935 Silvino Gumpal 1st National Assembly1935–1938 Mauro Verzosa 2nd National Assembly1938–1941 1st Commonwealth Congress1945 Lino J. Castillejos 1st Congress1946–1949 Domingo Paguirigan 2nd Congress1949–1953 Samuel Reyes 3rd Congress1953–1957 4th Congress1957–1961 Delfin B. Albano 5th Congress1961–1965 6th Congress1965–1969 Melanio T. Singson 7th Congress1969–1972 Rodolfo B. Albano, Jr. Notes
At-Large (defunct) 1943–1944 Period Representative National Assembly1943–1944 Lino J. Castillejos Gregorio P. Formoso
1984–1986 Period Representative Regular Batasang Pambansa1984–1986 Rodolfo B. Albano, Jr. Prospero G. Bello Simplicio B. Domingo, Jr.
References