Cotabato's 1st congressional district

Cotabato's 1st congressional district is one of the three congressional districts of the Philippines in the province of Cotabato. It has been represented in the House of Representatives since 1987. The district covers western Cotabato, bordered on three sides by the province of Maguindanao and which, since 2019, contains several exclaves of the Bangsamoro autonomous region. It consists of the municipalities of Alamada, Aleosan, Libungan, Midsayap, Pigcawayan and Pikit. Prior to redistricting in 2012, the district also included the municipalities of Banisilan, Carmen and Kabacan. It is currently represented in the 19th Congress by Joselito S. Sacdalan of the PDP–Laban.

Representation history
{| class=wikitable ! 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;" |
 * colspan="9" style="text-align:center;" |

Cotabato's 1st district for the House of Representatives of the Philippines

 * colspan="9" style="text-align:center;" | District created February 2, 1987 from Cotabato's at-large district.
 * style="text-align:center;" | 1
 * style="color:inherit;background:;" |
 * Rodrigo B. Gutang
 * June 30, 1987
 * June 30, 1992
 * style="text-align:center;" | 8th
 * PDP–Laban
 * Elected in 1987.
 * rowspan="8" style="text-align:center;" | 1987–2013 Alamada, Aleosan, Banisilan, Carmen, Kabacan, Libungan, Midsayap, Pigcawayan, Pikit
 * rowspan="3" style="text-align:center;" | 2
 * rowspan="2" style="color:inherit;background:;" |
 * rowspan="3" | Anthony P. Dequiña
 * rowspan="3" | June 30, 1992
 * rowspan="3" | June 30, 2001
 * style="text-align:center;" | 9th
 * rowspan="2" | NPC
 * Elected in 1992.
 * style="text-align:center;" | 10th
 * Re-elected in 1995.
 * style="color:inherit;background:;" |
 * style="text-align:center;" | 11th
 * LAMMP
 * Re-elected in 1998.
 * rowspan="3" style="text-align:center;" | 3
 * style="color:inherit;background:;" |
 * rowspan="3" | Emmylou Taliño-Mendoza
 * rowspan="3" | June 30, 2001
 * rowspan="3" | June 30, 2010
 * style="text-align:center;" | 12th
 * Independent
 * Elected in 2001.
 * style="color:inherit;background:;" |
 * style="text-align:center;" | 13th
 * Nacionalista
 * Re-elected in 2004.
 * style="color:inherit;background:;" |
 * style="text-align:center;" | 14th
 * Lakas
 * Re-elected in 2007.
 * rowspan="3" style="text-align:center;" | 4
 * rowspan="2" style="color:inherit;background:;" |
 * rowspan="3" | Jesus N. Sacdalan
 * rowspan="3" | June 30, 2010
 * rowspan="3" | June 30, 2019
 * style="text-align:center;" | 15th
 * rowspan="2" | Liberal
 * Elected in 2010.
 * style="text-align:center;" | 16th
 * Re-elected in 2013.
 * rowspan=99 style="text-align:center;" | 2013–present Alamada, Aleosan, Libungan, Midsayap, Pigcawayan, Pikit
 * style="color:inherit;background:;" |
 * style="text-align:center;" | 17th
 * PDP–Laban
 * Re-elected in 2016.
 * rowspan="2" style="text-align:center;" | 5
 * rowspan="2" style="color:inherit;background:;" |
 * rowspan="2" | Joselito S. Sacdalan
 * rowspan="2" | June 30, 2019
 * rowspan="2" | Incumbent
 * style="text-align:center;" | 18th
 * rowspan="2" | PDP–Laban
 * Elected in 2019.
 * style="text-align:center;" | 19th
 * Re-elected in 2022.
 * }
 * rowspan="2" style="text-align:center;" | 5
 * rowspan="2" style="color:inherit;background:;" |
 * rowspan="2" | Joselito S. Sacdalan
 * rowspan="2" | June 30, 2019
 * rowspan="2" | Incumbent
 * style="text-align:center;" | 18th
 * rowspan="2" | PDP–Laban
 * Elected in 2019.
 * style="text-align:center;" | 19th
 * Re-elected in 2022.
 * }
 * Re-elected in 2022.
 * }