South Cotabato's 1st congressional district

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	3 LGUs Municipalities Polomolok Tampakan Tupi
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]

Representation history

#	Image		Member	Term of office		Congress	Party	Electoral history	Constituent LGUs
				Start	End
District created February 2, 1987 from South Cotabato's at-large district. [4]
1			Adelbert W. Antonino	June 30, 1987	June 30, 1992	8th	LDP	Elected in 1987.	1987–2022 General Santos, Polomolok, Tampakan, Tupi
2			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			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 delayed to late 2019.
5			Shirlyn Bañas Nograles	November 4, 2019	June 30, 2022		PDP–Laban	Delayed election declared as unconstitutional. Elected in 2019.
6			Isidro D. Lumayag	June 30, 2022	Incumbent	19th	PFP	Elected in 2022.	2022–present Polomolok, Tampakan, Tupi

Election results

2022

2022 Philippine House of Representatives election in South Cotabato's 1st congressional district

Party		Candidate	Votes	%
	PFP	Isidro Lumayag	80,501	58.95
	PDP–Laban	Danny Nograles	56,053	41.05
Total votes			136,554	100.00

2013

2013 Philippine House of Representatives election at South Cotabato's 1st district

Party		Candidate	Votes	%
	NPC	Pedro Acharon	138,079	51.43
	UNA	Rogelio Pacquiao	130,377	48.57
Total votes			268,456	100.00
	NPC hold

2010

2010 Philippine House of Representatives election at South Cotabato's 1st district

Party		Candidate	Votes	%
	NPC	Pedro Acharon Jr.	163,590	63.24
	Independent	Ramon Melliza	51,306	19.83
	Liberal	Rogelio Garcia	14,053	5.43
	Independent	Franklin Gacal, Jr.	6,327	2.45
	Independent	Aldwin Angangan	985	0.38
	Independent	Abelardo Plaza	731	0.28
Valid ballots			236,992	91.61
Invalid or blank votes			21,694	8.39
Total votes			258,686	100.00
	NPC hold

2007

2007 Philippine House of Representatives election at South Cotabato's 1st district

Party		Candidate	Votes	%
	NPC	Darlene Antonino-Custodio	139,061	64.49
	Liberal	Manny Pacquiao	75,908	35.51
Valid ballots			214,969	100.00
	NPC hold

See also

• Legislative districts of South Cotabato
• South Cotabato's 2nd congressional district
• South Cotabato's 3rd congressional district
• General Santos's lone congressional district
• Legislative districts of Cotabato
• Legislative districts of Sarangani
• Legislative districts of Sultan Kudarat

References

1. "TABLE 1. Population of legislative districts by Region, Province, and selected Highly Urbanized/Component City : 2020" (PDF). Philippine Statistics Authority . Retrieved June 17, 2022.
2. "Data on the Total Number Established and Clustered Precincts, Registered Voters and Voting Centers" (PDF). Commission on Elections. Retrieved July 30, 2025.
3. "Roster of Philippine legislators". House of Representatives of the Philippines . Retrieved March 2, 2021.
4. "The 1987 Constitution of the Republic of the Philippines". Chan Robles Virtual Law Library. Retrieved March 2, 2021.
5. Republic Act No. 11243 (March 11, 2019), An Act Reapportioning the First Legislative District of the Province of South Cotabato Therby Creating the Lone Legislative District of General Santos City (PDF), retrieved March 2, 2021
6. Commission on Elections (Philippines) (July 25, 2019). "COMELEC Resolution No. 10552" (PDF). Retrieved March 2, 2021.
7. "House Members". House of Representatives of the Philippines . Retrieved September 18, 2023.