Negros Occidental's 1st congressional district

Negros Occidental's 1st congressional district is one of the six congressional districts of the Philippines in the province of Negros Occidental. It has been represented in the House of Representatives of the Philippines since 1916 and earlier in the Philippine Assembly from 1907 to 1916. The district consists of the northern Negros Occidental cities of Escalante and San Carlos, as well as adjacent municipalities of Calatrava, Don Salvador Benedicto and Toboso. It is currently represented in the 18th Congress by Gerardo Valmayor Jr. of the Nationalist People's Coalition (NPC).

Representation history
{| class=wikitable ! rowspan="2" | # ! rowspan="2" colspan=2 | Member ! colspan=2 | Term of office ! rowspan="2" | Legislature ! rowspan="2" | Party ! rowspan="2" | Electoral history ! rowspan="2" | Constituent LGUs !Start!!End
 * colspan="9" style="text-align:center;" |
 * colspan="9" style="text-align:center;" |

Negros Occidental's 1st district for the Philippine Assembly

 * colspan="9" style="text-align:center;" | District created January 9, 1907.
 * style="text-align:center;" | 1
 * style="color:inherit;background:;" |
 * Antonio Ledesma Jayme
 * October 16, 1907
 * March 13, 1909
 * style="text-align:center;" | 1st
 * Nacionalista
 * Elected in 1907.
 * rowspan="3" style="text-align:center;" | 1907–1916 Cadiz, Escalante, Manapla, Sagay, San Carlos, Saravia, Silay, Victorias
 * style="text-align:center;" | 2
 * style="color:inherit;background:;" |
 * José López Villanueva
 * October 16, 1909
 * October 16, 1912
 * style="text-align:center;" | 2nd
 * Nacionalista
 * Elected in 1909.
 * style="text-align:center;" | 3
 * style="color:inherit;background:;" |
 * Melecio Severino
 * October 16, 1912
 * May 16, 1915
 * style="text-align:center;" | 3rd
 * Nacionalista
 * Elected in 1912. Died.
 * colspan="9" style="text-align:center;" |
 * style="text-align:center;" | 3rd
 * Nacionalista
 * Elected in 1912. Died.
 * colspan="9" style="text-align:center;" |
 * colspan="9" style="text-align:center;" |

Negros Occidental's 1st district for the House of Representatives of the Philippine Islands
! rowspan="2" | # ! rowspan="2" colspan=2 | Member ! colspan=2 | Term of office ! rowspan="2" | National Assembly ! rowspan="2" | Party ! rowspan="2" | Electoral history ! rowspan="2" | Constituent LGUs !Start!!End
 * rowspan="2" style="text-align:center;" | 4
 * rowspan="2" style="color:inherit;background:;" |
 * rowspan="2" | Lope P. Severino
 * rowspan="2" | October 16, 1916
 * rowspan="2" | June 6, 1922
 * style="text-align:center;" | 4th
 * rowspan="2" | Nacionalista
 * Elected in 1916.
 * rowspan="3" style="text-align:center;" | 1916–1925 Cadiz, Escalante, Manapla, Sagay, San Carlos, Saravia, Silay, Victorias
 * style="text-align:center;" | 5th
 * Re-elected in 1919.
 * rowspan="2" style="text-align:center;" | 5
 * style="background-color:#B22222|
 * rowspan="2" | Serafín P. Hilado
 * rowspan="2" | June 6, 1922
 * rowspan="2" | June 5, 1928
 * style="text-align:center;" | 6th
 * Nacionalista Unipersonalista
 * Elected in 1922.
 * style="color:inherit;background:;" |
 * style="text-align:center;" | 7th
 * Nacionalista Consolidado
 * Re-elected in 1925.
 * rowspan="4" style="text-align:center;" | 1925–1935 Cadiz, Calatrava, Escalante, Manapla, Sagay, San Carlos, Saravia, Silay, Victorias
 * style="text-align:center;" | 6
 * style="color:inherit;background:;" |
 * José Locsin
 * June 5, 1928
 * June 2, 1931
 * style="text-align:center;" | 8th
 * Nacionalista Consolidado
 * Elected in 1928.
 * rowspan="2" style="text-align:center;" | 7
 * style="color:inherit;background:;" |
 * rowspan="2" | Enrique Magalona
 * rowspan="2" | June 2, 1931
 * rowspan="2" | September 16, 1935
 * style="text-align:center;" | 9th
 * Nacionalista Consolidado
 * Elected in 1931.
 * style="color:inherit;background:;" |
 * style="text-align:center;" | 10th
 * Nacionalista Democrático
 * Re-elected in 1934.
 * Nacionalista Consolidado
 * Elected in 1931.
 * style="color:inherit;background:;" |
 * style="text-align:center;" | 10th
 * Nacionalista Democrático
 * Re-elected in 1934.
 * Re-elected in 1934.
 * colspan="9" style="text-align:center;" |
 * colspan="9" style="text-align:center;" |

Negros Occidental's 1st district for the National Assembly (Commonwealth of the Philippines)
! rowspan="2" | # ! rowspan="2" colspan=2 | Member ! colspan=2 | Term of office ! rowspan="2" | Common wealth Congress ! rowspan="2" | Party ! rowspan="2" | Electoral history ! rowspan="2" | Constituent LGUs !Start!!End
 * rowspan="2" style="text-align:center;" | (7)
 * style="color:inherit;background:;" |
 * rowspan="2" | Enrique Magalona
 * rowspan="2" | September 16, 1935
 * rowspan="2" | December 30, 1941
 * style="text-align:center;" | 1st
 * Nacionalista Democrático
 * Re-elected in 1935.
 * rowspan="2" style="text-align:center;" | 1935–1941 Cadiz, Calatrava, Escalante, Manapla, Sagay, San Carlos, Saravia, Silay, Victorias
 * style="color:inherit;background:;" |
 * style="text-align:center;" | 2nd
 * Nacionalista
 * Re-elected in 1938.
 * colspan="9" style="text-align:center;" | District dissolved into the two-seat Negros Occidental's at-large district for the National Assembly (Second Philippine Republic).
 * Re-elected in 1938.
 * colspan="9" style="text-align:center;" | District dissolved into the two-seat Negros Occidental's at-large district for the National Assembly (Second Philippine Republic).
 * colspan="9" style="text-align:center;" | District dissolved into the two-seat Negros Occidental's at-large district for the National Assembly (Second Philippine Republic).
 * colspan="9" style="text-align:center;" |
 * colspan="9" style="text-align:center;" |

Negros Occidental's 1st district for the House of Representatives of the Commonwealth of the Philippines
! rowspan="2" | # ! rowspan="2" colspan=2 | Member ! colspan=2 | Term of office ! rowspan="2" | Congress ! rowspan="2" | Party ! rowspan="2" | Electoral history ! rowspan="2" | Constituent LGUs !Start!!End
 * colspan="9" style="text-align:center;" | District re-created May 24, 1945.
 * style="text-align:center;" | (7)
 * style="color:inherit;background:;" |
 * Enrique Magalona
 * June 11, 1945
 * May 25, 1946
 * style="text-align:center;" | 1st
 * Nacionalista
 * Re-elected in 1941.
 * style="text-align:center;" | 1945–1946 Cadiz, Calatrava, Escalante, Manapla, Sagay, San Carlos, Saravia, Silay, Victorias
 * Re-elected in 1941.
 * style="text-align:center;" | 1945–1946 Cadiz, Calatrava, Escalante, Manapla, Sagay, San Carlos, Saravia, Silay, Victorias
 * colspan="9" style="text-align:center;" |
 * colspan="9" style="text-align:center;" |

Negros Occidental's 1st district for the House of Representatives of the Philippines

 * style="text-align:center;" | 8
 * style="color:inherit;background:;" |
 * Vicente F. Gustilo Sr.
 * May 25, 1946
 * December 30, 1949
 * style="text-align:center;" | 1st
 * Nacionalista
 * Elected in 1946.
 * style="text-align:center;" | 1946–1949 Cadiz, Calatrava, Escalante, Manapla, Sagay, San Carlos, Saravia, Silay, Victorias
 * style="text-align:center;" | 9
 * style="color:inherit;background:;" |
 * Francisco Ferrer
 * December 30, 1949
 * December 30, 1953
 * style="text-align:center;" | 2nd
 * Liberal
 * Elected in 1949.
 * rowspan="6" style="text-align:center;" | 1949–1969 Cadiz, Calatrava, Escalante, Manapla, Sagay, San Carlos, Saravia, Silay, Toboso, Victorias
 * style="text-align:center;" | 10
 * style="color:inherit;background:;" |
 * José B. Puey
 * December 30, 1953
 * December 30, 1957
 * style="text-align:center;" | 3rd
 * Democratic
 * | Elected in 1953.
 * rowspan="2" style="text-align:center;" | (8)
 * rowspan="2" style="color:inherit;background:;" |
 * rowspan="2" | Vicente F. Gustilo Sr.
 * rowspan="2" | December 30, 1957
 * rowspan="2" | December 17, 1962
 * style="text-align:center;" | 4th
 * rowspan="2" | Nacionalista
 * Elected in 1957.
 * rowspan="2" style="text-align:center;" | 5th
 * Re-elected in 1961. Died.
 * rowspan="3" style="text-align:center;" | 11
 * rowspan="3" style="color:inherit;background:;" |
 * rowspan="3" | Armando C. Gustilo
 * rowspan="3" | January 27, 1964
 * rowspan="3" | September 23, 1972
 * rowspan="3" | Nacionalista
 * Elected in 1963 to finish Gustilo Sr.'s term.
 * style="text-align:center;" | 6th
 * Re-elected in 1965.
 * style="text-align:center;" | 7th
 * Re-elected in 1969. Removed from office after imposition of martial law.
 * style="text-align:center;" | 1969–1972 Cadiz, Calatrava, Enrique B. Magalona, Escalante, Manapla, Sagay, San Carlos, Silay, Toboso, Victorias
 * colspan="9" style="text-align:center;" | District dissolved into the sixteen-seat Region VI's at-large district for the Interim Batasang Pambansa, followed by the seven-seat Negros Occidental's at-large district for the Regular Batasang Pambansa.
 * colspan="9" style="text-align:center;" | District re-created February 2, 1987.
 * style="text-align:center;" | 12
 * style="color:inherit;background:;" |
 * Salvador S. Laguda
 * June 30, 1987
 * June 30, 1992
 * style="text-align:center;" | 8th
 * Lakas ng Bansa
 * Elected in 1987.
 * rowspan="12" style="text-align:center;" | 1987–present Calatrava, Escalante, Don Salvador Benedicto, San Carlos, Toboso
 * style="text-align:center;" | 13
 * style="color:inherit;background:;" |
 * Tranquilino B. Carmona
 * June 30, 1992
 * June 30, 1995
 * style="text-align:center;" | 9th
 * NPC
 * Elected in 1992.
 * rowspan="3" style="text-align:center;" | 14
 * rowspan="3" style="color:inherit;background:;" |
 * rowspan="3" | Julio A. Ledesma IV
 * rowspan="3" | June 30, 1995
 * rowspan="3" | June 30, 2004
 * style="text-align:center;" | 10th
 * rowspan="3" | NPC
 * Elected in 1995.
 * style="text-align:center;" | 11th
 * Re-elected in 1998.
 * style="text-align:center;" | 12th
 * Re-elected in 2001.
 * style="text-align:center;" | (13)
 * style="color:inherit;background:;" |
 * Tranquilino B. Carmona
 * June 30, 2004
 * June 30, 2007
 * style="text-align:center;" | 13th
 * Lakas
 * Re-elected in 2004.
 * rowspan="3" style="text-align:center;" | (14)
 * rowspan="3" style="color:inherit;background:;" |
 * rowspan="3" | Julio A. Ledesma IV
 * rowspan="3" | June 30, 2007
 * rowspan="3" | June 30, 2016
 * style="text-align:center;" | 14th
 * rowspan="3" | NPC
 * Elected in 2007.
 * style="text-align:center;" | 15th
 * Re-elected in 2010.
 * style="text-align:center;" | 16th
 * Re-elected in 2013.
 * style="text-align:center;" | 15
 * style="color:inherit;background:;" |
 * Melecio J. Yap Jr.
 * June 30, 2016
 * June 30, 2019
 * style="text-align:center;" | 17th
 * NPC
 * Elected in 2016.
 * rowspan="2" style="text-align:center;" | 16
 * rowspan="2" style="color:inherit;background:;" |
 * rowspan="2" | Gerardo P. Valmayor Jr.
 * rowspan="2" | June 30, 2019
 * rowspan="2" | Incumbent
 * style="text-align:center;" | 18th
 * rowspan="2" | NPC
 * Elected in 2019.
 * style="text-align:center;" | 19th
 * Re-elected in 2022.
 * }
 * style="text-align:center;" | 15
 * style="color:inherit;background:;" |
 * Melecio J. Yap Jr.
 * June 30, 2016
 * June 30, 2019
 * style="text-align:center;" | 17th
 * NPC
 * Elected in 2016.
 * rowspan="2" style="text-align:center;" | 16
 * rowspan="2" style="color:inherit;background:;" |
 * rowspan="2" | Gerardo P. Valmayor Jr.
 * rowspan="2" | June 30, 2019
 * rowspan="2" | Incumbent
 * style="text-align:center;" | 18th
 * rowspan="2" | NPC
 * Elected in 2019.
 * style="text-align:center;" | 19th
 * Re-elected in 2022.
 * }
 * style="text-align:center;" | 19th
 * Re-elected in 2022.
 * }