# Legislative districts of Ilocos Sur

The legislative districts of Ilocos Sur are the representations of the province of Ilocos Sur in the various national legislatures of the Philippines. The province is currently represented in the lower house of the Congress of the Philippines through its first and second congressional districts.
Abra last formed part of the province's representation in 1917.
The first district of Ilocos Sur is among the original representative districts from 1907 which has never changed in territorial coverage, along with Albay's first, Ilocos Norte's first and second, and Iloilo's first districts.

## History

Ilocos Sur, which at the time included the sub-province of Abra, was initially divided in 1907 into three representative districts. Abra was last represented as part of the province's now-defunct third district in 1917, after its re-establishment as a regular province on March 10, 1917, by virtue of Act No. 2683 warranted its separate representation, thereby reducing Ilocos Sur to two districts.
When the Philippine Commission detached Tagudin from Ilocos Sur and made it the capital of the sub-province of Amburayan in Mountain Province on May 15, 1907, by virtue of Act No. 1646, the town's residents were still allowed to vote as part of the Ilocos Sur's second district. This arrangement was terminated on August 10, 1916, under Act No. 2657 (the Administrative Code of the Philippine Islands), which removed the town from the second district.
The enactment of Act No. 2877 in 1920 reorganized northwestern Luzon, by abolishing the sub-province of Amburayan in the undivided Mountain Province and annexing several of its municipal entities—Alilem, Sigay, Sugpon, Suyo and its capital Tagudin—to Ilocos Sur. The Lepanto sub-province townships of Angaki, Concepcion, San Emilio and its capital Cervantes were also placed under the jurisdiction of Ilocos Sur. However residents of these areas remained represented by the Mountain Province's appointed assembly members until they were finally extended the right to vote in assembly district elections in 1935, after the passage of Act No. 4203 placed them in the second district of Ilocos Sur.
Ilocos Sur was represented in the Interim Batasang Pambansa as part of Region I from 1978 to 1984, and elected two representatives to the Regular Batasang Pambansa in 1984. The province retained its two congressional districts under the new Constitution which was proclaimed on February 11, 1987, and elected members to the restored House of Representatives starting that same year.

## 1st District

* City: Vigan (became city 2001)
* Municipalities: Cabugao, Magsingal, San Juan (Lapog), Santa Catalina, Santo Domingo, Sinait, Bantay (re-established 1911), Caoayan (re-established 1911), San Vicente (re-established 1911), San Ildefonso (re-established 1919)
* Population (2020): 298,333
| Period | Representative |
| 1st Philippine Legislature 1907–1909 | Vicente S. Encarnacion |
| 2nd Philippine Legislature 1909–1912 | Vicente S. Encarnacion |
| 2nd Philippine Legislature 1909–1912 | Alberto Reyes |
| 3rd Philippine Legislature 1912–1916 | Alberto Reyes |
| 4th Philippine Legislature 1916–1919 | Alberto Reyes |
| 5th Philippine Legislature 1919–1922 | Elpidio R. Quirino |
| 6th Philippine Legislature 1922–1925 | Vicente S. Pablo |
| 7th Philippine Legislature 1925–1928 | Simeon Ramos |
| 8th Philippine Legislature 1928–1931 | Benito Soliven |
| 9th Philippine Legislature 1931–1934 | Pedro S. Reyes |
| 10th Philippine Legislature 1934–1935 | Pedro S. Reyes |
| 1st National Assembly 1935–1938 | Benito Soliven |
| 2nd National Assembly 1938–1941 | Benito Soliven |
| 1st Commonwealth Congress 1945 | Jesus Serrano |
| 1st Congress 1946–1949 | Floro Crisologo |
| 2nd Congress 1949–1953 | Floro Crisologo |
| 3rd Congress 1953–1957 | Floro Crisologo |
| 4th Congress 1957–1961 | Faustino B. Tobia |
| 5th Congress 1961–1965 | Floro Crisologo |
| 6th Congress 1965–1969 | Floro Crisologo |
| 7th Congress 1969–1972 | Floro Crisologo |
| 7th Congress 1969–1972 | vacant |
| 8th Congress 1987–1992 | Luis C. Singson |
| 9th Congress 1992–1995 | Mariano M. Tajon |
| 10th Congress 1995–1998 | Mariano M. Tajon |
| 11th Congress 1998–2001 | Salacnib F. Baterina |
| 12th Congress 2001–2004 | Salacnib F. Baterina |
| 13th Congress 2004–2007 | Salacnib F. Baterina |
| 14th Congress 2007–2010 | Ronald V. Singson |
| 15th Congress 2010–2013 | Ronald V. Singson |
| 15th Congress 2010–2013 | Ryan Luis V. Singson |
| 16th Congress 2013–2016 | Ronald V. Singson |
| 17th Congress 2016–2019 | Deogracias Victor B. Savellano |
| 18th Congress 2019–2022 | Deogracias Victor B. Savellano |
| 19th Congress 2022–2025 | Ronald V. Singson |
Notes
* ↑ Appointed to the Philippine Commission in 1913.
* ↑ Assumed office after winning special election held on October 13, 1913, to fill vacated seat.
* ↑ Assassinated on October 18, 1970; seat remained vacant until the end of the 7th Congress.
* ↑ Resigned on March 1, 2011, after being convicted by the Hong Kong High Court for drug possession.
* ↑ Elected in a special election held on May 28, 2011; took oath of office on May 30, 2011, and served for the remainder of the 15th Congress.

## 2nd District

* City: Candon (became city 2001)
* Municipalities: Banayoyo, Burgos, Galimuyod, Lidlidda, Nagbukel, Narvacan, Salcedo (Baugen), San Esteban, Santa, Santa Cruz, Santa Lucia, Santa Maria, Santiago, Alilem, Cervantes, Gregorio del Pilar (Concepcion), Quirino (Angaki), San Emilio, Sigay, Sugpon, Suyo, Tagudin
* Population (2020): 407,676
| Period | Representative |
| 1st National Assembly 1935–1938 | Sixto Brillantes |
| 2nd National Assembly 1938–1941 | Prospero Sanidad |
| 1st Commonwealth Congress 1945 | Prospero Sanidad |
| 1st Congress 1946–1949 | Fidel Villanueva |
| 2nd Congress 1949–1953 | Ricardo Gacula |
| 3rd Congress 1953–1957 | Ricardo Gacula |
| 4th Congress 1957–1961 | Godofredo S. Reyes |
| 5th Congress 1961–1965 | Pablo Sanidad |
| 6th Congress 1965–1969 | Pablo Sanidad |
| 7th Congress 1969–1972 | Lucas V. Cauton |
| 8th Congress 1987–1992 | Eric D. Singson |
| 9th Congress 1992–1995 | Eric D. Singson |
| 10th Congress 1995–1998 | Eric D. Singson |
| 11th Congress 1998–2001 | Grace G. Singson |
| 12th Congress 2001–2004 | Eric D. Singson |
| 13th Congress 2004–2007 | Eric D. Singson |
| 14th Congress 2007–2010 | Eric D. Singson |
| 15th Congress 2010–2013 | Eric G. Singson, Jr. |
| 16th Congress 2013–2016 | Eric D. Singson |
| 17th Congress 2016–2019 | Eric D. Singson |
| 18th Congress 2019–2022 | Kristine Singson-Meehan |
| 19th Congress 2022–2025 | Kristine Singson-Meehan |
Notes
* 1 2 3 4 5 6 7 8 9 Annexed to Ilocos Sur on February 4, 1920, but remained represented as part of the representation of Mountain Province until 1935. Extended the right to elect the representative of the second district of Ilocos Sur in 1935.
* ↑ Removed from list of members of the House of Representatives on January 25, 1960, after running in the November 10, 1959, election for governor of Ilocos Sur.
* ↑ Only took oath of office for second term on January 21, 1969, following a long legal battle over results of election contested by retired Brig. Gen. Lucas V. Cauton.

### 1907–1916

* Municipalities: Candon, Narvacan, Santa Cruz, Santa Lucia, Santa Maria, Santiago, Tagudin, San Esteban (re-established 1911)
| Period | Representative |
| 1st Philippine Legislature 1907–1909 | Maximino Mina |
| 2nd Philippine Legislature 1909–1912 | Jose Ma. del Valle |
| 3rd Philippine Legislature 1912–1916 | Gregorio Talavera |
Notes
* ↑ Annexed to Amburayan sub-province, Mountain Province May 15, 1907, but remained represented as part of the first district of Ilocos Sur until the arrangement was terminated on August 10, 1916, by virtue of Act No. 2657.

### 1916–1919

* Municipalities: Candon, Narvacan, San Esteban, Santa Cruz, Santa Lucia, Santa Maria, Santiago
| Period | Representative |
| 4th Philippine Legislature 1916–1919 | Ponciano Morales |

### 1919–1935

* Municipalities: Candon, Narvacan, San Esteban, Santa, Santa Cruz, Santa Lucia, Santa Maria, Santiago, Banayoyo (established 1919), Lidlidda (established 1919), Nagbuquel (established 1919), Burgos (Nueva Coveta) (established 1920), Bauguen (established 1922), Galimuyod (established 1922)
| Period | Representative |
| 5th Philippine Legislature 1919–1922 | Ponciano Morales |
| 6th Philippine Legislature 1922–1925 | Lupo Biteng |
| 7th Philippine Legislature 1925–1928 | Lupo Biteng |
| 8th Philippine Legislature 1928–1931 | Fidel Villanueva |
| 9th Philippine Legislature 1931–1934 | Fidel Villanueva |
| 10th Philippine Legislature 1934–1935 | Prospero Sanidad |

## 3rd District (defunct)

* Municipalities: Bangued, Bucay, Dolores, La Paz, Pidigan, Pilar, San Quintin, Santa, Tayum
| Period | Representative |
| 1st Philippine Legislature 1907–1909 | Juan Villamor |
| 2nd Philippine Legislature 1909–1912 | Juan Villamor |
| 3rd Philippine Legislature 1912–1916 | Julio Borbon |
| 4th Philippine Legislature 1916–1917 | Eustaquio Purungganan |

## At-Large (defunct)
### 1943–1944

| Period | Representatives |
| National Assembly 1943–1944 | Fidel Villanueva |
| National Assembly 1943–1944 | Alejandro Quirologico (ex officio) |

### 1984–1986

| Period | Representatives |
| Regular Batasang Pambansa 1984–1986 | Salacnib F. Baterina |
| Regular Batasang Pambansa 1984–1986 | Eric D. Singson |