# Agusan del Sur's 1st congressional district

Agusan del Sur's 1st congressional district is the congressional district of the Philippines in Agusan del Sur. It has been represented in the House of Representatives of the Philippines since 2010. Previously included in Agusan del Sur's at-large congressional district from 1987 to 2010, it encompasses the northern part of the province, bordering Agusan del Norte. It is currently represented in the 18th Congress by Alfel Bascug of the National Unity Party.

## Representation history

| # | Image | Image | Member | Term of office | Term of office | Congress | Party | Electoral history | Constituent LGUs |
| # | Image | Image | Member | Start | End | Congress | Party | Electoral history | Constituent LGUs |
| District created October 20, 2008 from Agusan del Sur's at-large district. ||||||||||
| 1 | | | Maria Valentina Plaza | June 30, 2010 | June 30, 2019 | 15th | Lakas | Elected in 2010. | 2010–present: Bayugan, Esperanza, Prosperidad, San Luis, Sibagat, Talacogon |
| 1 | | | Maria Valentina Plaza | June 30, 2010 | June 30, 2019 | 16th | NUP | Re-elected in 2013. | 2010–present: Bayugan, Esperanza, Prosperidad, San Luis, Sibagat, Talacogon |
| 1 | | | Maria Valentina Plaza | June 30, 2010 | June 30, 2019 | 17th | PDP–Laban | Re-elected in 2016. | 2010–present: Bayugan, Esperanza, Prosperidad, San Luis, Sibagat, Talacogon |
| 2 | | | Alfel Bascug | June 30, 2019 | Incumbent | 18th | NUP | Elected in 2019. | 2010–present: Bayugan, Esperanza, Prosperidad, San Luis, Sibagat, Talacogon |
| 2 | | | Alfel Bascug | June 30, 2019 | Incumbent | 19th | NUP | Re-elected in 2022. | 2010–present: Bayugan, Esperanza, Prosperidad, San Luis, Sibagat, Talacogon |

## Election results
### 2010

Philippine House of Representatives election at Agusan del Sur's 1st district :
| Party | Party | Candidate | Votes | % |
| | Lakas–Kampi | Maria Valentina Plaza | 75,986 | 65.25 |
| | Liberal | Roberto Aquino | 40,464 | 34.75 |
| Valid ballots | Valid ballots | Valid ballots | 116,450 | 91.57 |
| Invalid or blank votes | Invalid or blank votes | Invalid or blank votes | 10,720 | 8.43 |
| Total votes | Total votes | Total votes | 127,170 | 100.00 |
| | Lakas–Kampi win (new seat) | Lakas–Kampi win (new seat) | Lakas–Kampi win (new seat) | Lakas–Kampi win (new seat) |

### 2013

2013 Philippine House of Representatives election at Agusan del Sur's 1st district :
| Party | Party | Candidate | Votes |
| | Liberal | Roberto Aquino | |
| | NUP | Maria Valentina Plaza | |
| Margin of victory | Margin of victory | Margin of victory | |
| Rejected ballots | Rejected ballots | Rejected ballots | |
| Turnout | Turnout | Turnout | |
| | NUP hold | NUP hold | Swing |

### 2016

2016 Philippine House of Representatives election at Agusan del Sur's 1st District :
| Party | Party | Candidate | Votes | % |
| | NUP | Ma. Valentina Plaza-Cornelio | | |
| Total votes | Total votes | Total votes | | |
| | NUP hold | NUP hold | NUP hold | NUP hold |

### 2019

2016 Philippine House of Representatives election in Agusan del Sur City :
| Party | Party | Candidate | Votes | % |
| | NUP | Alfelito Bascug | 82,984 | 64.18% |
| | PDSP | Boyet Plaza | 46,307 | 35.81% |
| Valid ballots | Valid ballots | Valid ballots | 129,291 | 80.33 |
| Invalid or blank votes | Invalid or blank votes | Invalid or blank votes | 30657 | 19.17 |
| Total votes | Total votes | Total votes | 159,948 | 100.00 |
| | NUP gain from PDP–Laban | NUP gain from PDP–Laban | NUP gain from PDP–Laban | NUP gain from PDP–Laban |