| Agusan del Sur's 1st congressional district | |
| Population: | 342,618[1] |
| Blank2 Name: | Congressional bloc |
| Blank1 Info: | NUP |
| Blank1 Name: | Political party |
| Members: | Alfel Bascug |
| Members Label: | Representative |
| Towns: | Bayugan, Esperanza, Prosperidad, San Luis, Sibagat, Talacogon |
| Region: | Caraga |
| Parl Name: | House of Representatives of the Philippines |
| Region Label: | Region |
| District: | Agusan del Sur |
| District Label: | City |
| Caption2: | Location of Agusan del Sur within the Philippines |
| Blank2 Info: | Majority |
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.[2]
| Member | Term of office | Congress | Party | Electoral history | ConstituentLGUs | |||
|---|---|---|---|---|---|---|---|---|
| Start | End | |||||||
| District created October 20, 2008 from Agusan del Sur's at-large district.[3] | ||||||||
| 1 | Maria Valentina Plaza | June 30, 2010 | June 30, 2019 | 15th | NUP | Elected in 2010. | 2010–present: Bayugan, Esperanza, Prosperidad, San Luis, Sibagat, Talacogon | |
| 16th | Re-elected in 2013. | |||||||
| 17th | PDP–Laban | Re-elected in 2016. | ||||||
| 2 | Alfel Bascug | June 30, 2019 | Incumbent | 18th | NUP | Elected in 2019. | ||
| 19th | Re-elected in 2022. | |||||||