Oriental Mindoro's at-large congressional district is a former congressional district that encompassed the area of Oriental Mindoro in the Philippines.
[1] The province of Oriental Mindoro was created as a result of the partition of Mindoro in 1950 and elected its first representative provincewide at-large during the 1953 Philippine House of Representatives elections.
[2] Raúl T. Leuterio, who served as representative of Mindoro's at-large congressional district during the partition was this district's first representative upon the election of a representative for Occidental Mindoro on January 25, 1952.
It was later absorbed by the multi-member Region IV-A's at-large district for the national parliament in 1978.
[1] In 1984, provincial and city representations were restored, and Oriental Mindoro elected two members for the regular parliament.