Agusan del Sur's at-large congressional district is an obsolete congressional district that encompassed the entire province of Agusan del Sur in the Philippines.
[1] The province of Agusan del Sur was created as a result of the partition of Agusan in 1967 and elected its first representative provincewide at-large during the 1969 Philippine House of Representatives elections.
[2] It was a short-lived district for the Third Philippine Republic Congress, having been eliminated following the dissolution of the lower house in 1972.
The province was later absorbed by the multi-member Region X's at-large district for the national parliament in 1978.
[1] In 1984, provincial and city representations were restored and Agusan del Sur elected a member for the regular parliament.