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.
Six Districts (2019-Present)
1st District
City: Ilagan
Municipalities: Cabagan, Delfin Albano, Divilacan, Maconacon, San Pablo, Santa Maria, Santo Tomas, Tumauini Population (2020): 399,196
2nd District
Municipalities: Benito Soliven, Gamu, Naguilian, Palanan, Reina Mercedes, San Mariano Population (2020): 199,903
3rd District
Municipalities: Alicia, Angadanan, Cabatuan, Ramon, San Mateo
Population (2020): 282,027
4th District
City: Santiago
Municipalities: Cordon, Dinapigue, Jones, San Agustin
Population (2020): 268,602
5th District
Municipalities: Aurora, Burgos, Luna, Mallig, Quezon, Quirino, Roxas, San Manuel
Population (2020): 267,550
6th District
City: Cauayan
Municipalities: Echague, San Guillermo, San Isidro
Population (2020): 279,772
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
2nd District
Municipalities: Aurora, Benito Soliven, Burgos, Gamu, Mallig, Naguilian, Quezon, Quirino, Roxas, San Manuel, San Mariano
3rd District
City: Cauayan (became a city in 2001) Municipalities: Alicia, Angadanan, Cabatuan, Luna, Reina Mercedes, San Guillermo, San Mateo
4th District
City: Santiago (became a city in 1994) Municipalities: Cordon, Dinapigue, Echague, Jones, Ramon, San Agustin, San Isidro
Notes
Lone District (defunct)
Notes
At-Large (defunct)
1943–1944
1984–1986
References
Isabela
Politics of Isabela (province)