South Cotabato's 1st congressional district
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| South Cotabato's 1st congressional district | |
|---|---|
| Constituency for the House of Representatives of the Philippines | |
 Map | |
 Location of South Cotabato within the Philippines | |
| Province | South Cotabato |
| Region | Soccsksargen |
| Population | 297,574 (2024)[1] |
| Electorate | 195,438 (2025)[2] |
| Major settlements | |
| Area | 957.97 km2 (369.87 sq mi) |
| Current constituency | |
| Created | 1987 |
| Representative | Isidro D. Lumayag |
| Political party | PFP |
| Congressional bloc | Majority |
South Cotabato's 1st congressional district is one of the two congressional districts of the Philippines in the province of South Cotabato. It has been represented in the House of Representatives since 1987.[3] The district covers its southern municipalities of Polomolok, Tampakan and Tupi, and, until 2022, the independent city of General Santos.[4][5][6] It is currently represented in the 20th Congress by Isidro Lumayag of the Partido Federal ng Pilipinas.[7]
| # | Image | Member | Term of office | Congress | Party | Electoral history | Constituent LGUs | ||
|---|---|---|---|---|---|---|---|---|---|
| Start | End | ||||||||
South Cotabato's 1st district for the House of Representatives of the Philippines | |||||||||
| District created February 2, 1987 from South Cotabato's at-large district.[4] | |||||||||
| 1 | .jpg) |
Adelbert W. Antonino | June 30, 1987 | June 30, 1992 | 8th | LDP | Elected in 1987. | 1987–2022 General Santos, Polomolok, Tampakan, Tupi | |
| 2 | _(cropped).jpg) |
Luwalhati Antonino | June 30, 1992 | June 30, 2001 | 9th | Lakas | Elected in 1992. | ||
| 10th | Re-elected in 1995. | ||||||||
| 11th | LAMMP | Re-elected in 1998. | |||||||
| 3 | .jpg) |
Darlene Antonino Custodio | June 30, 2001 | June 30, 2010 | 12th | NPC | Elected in 2001. | ||
| 13th | Re-elected in 2004. | ||||||||
| 14th | Re-elected in 2007. | ||||||||
| 4 | Pedro B. Acharon Jr. | June 30, 2010 | June 30, 2019 | 15th | NPC | Elected in 2010. | |||
| 16th | Liberal (AIM) | Re-elected in 2013. | |||||||
| 17th | NPC | Re-elected in 2016. | |||||||
| Vacant | June 30, 2019 | November 4, 2019 | 18th | Election postponed to late 2019. | |||||
| 5 | .jpg) |
Shirlyn Bañas Nograles | November 4, 2019 | June 30, 2022 | PDP–Laban | Election postponement declared as unconstitutional. Elected in 2019. | |||
| 6 | .jpg) |
Isidro D. Lumayag | June 30, 2022 | Incumbent | 19th | PFP | Elected in 2022. | 2022–present Polomolok, Tampakan, Tupi | |
| 20th | Re-elected in 2025. | ||||||||
