Oriental Mindoro's at-large congressional district

Oriental Mindoro's at-large congressional district is a former congressional district that encompassed the area of Oriental Mindoro in the Philippines. It was represented in the House of Representatives from 1952 to 1972 and in the Regular Batasang Pambansa from 1984 to 1986. 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. 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. The district remained a single-member district until the dissolution of the lower house in 1972. It was later absorbed by the multi-member Region IV-A's at-large district for the national parliament in 1978. In 1984, provincial and city representations were restored, and Oriental Mindoro elected two members for the regular parliament. The district was abolished following the 1987 reapportionment under a new constitution.

Representation history
{| class=wikitable ! rowspan=2 | # ! colspan=2 | Term of office ! rowspan=2 | Congress ! colspan=4 | Single seat !Start!!End ! colspan="2" style="text-align:center;" | Member ! Party ! Electoral history
 * rowspan=2 |
 * - style="height:3em"
 * colspan="9" style="text-align:center;" |
 * colspan="9" style="text-align:center;" |

Oriental Mindoro's at-large district for the House of Representatives of the Philippines
! rowspan=2 | # ! colspan=2 | Term of office ! rowspan=2 | Batasang Pambansa ! colspan=4 | Seat A ! colspan=4 | Seat B !Start!!End ! colspan="2" style="text-align:center;" | Member ! Party ! Electoral history ! colspan="2" style="text-align:center;" | Member ! Party ! Electoral history
 * colspan="9" style="text-align:center;" | District created June 13, 1950 from Mindoro's at-large district.
 * style="text-align:center;" | 1
 * January 28, 1952
 * December 30, 1953
 * style="text-align:center;" | 2nd
 * rowspan=6 |
 * style="color:inherit;background:;" |
 * Raúl T. Leuterio
 * Liberal
 * Redistricted from Mindoro's at-large district.
 * style="text-align:center;" | 2
 * December 30, 1953
 * December 30, 1957
 * style="text-align:center;" | 3rd
 * style="color:inherit;background:;" |
 * Conrado M. Morente
 * Democratic
 * Elected in 1953.
 * style="text-align:center;" | 3
 * December 30, 1957
 * December 30, 1961
 * style="text-align:center;" | 4th
 * style="color:inherit;background:;" |
 * José A. Leido Sr.
 * Nacionalista
 * Elected in 1957.
 * rowspan="2" style="text-align:center;" | 4
 * rowspan="2" | December 30, 1961
 * rowspan="2" | December 30, 1969
 * style="text-align:center;" | 5th
 * rowspan="2" style="color:inherit;background:;" |
 * rowspan="2" | Luciano A. Joson
 * rowspan="2" | Liberal
 * Elected in 1961.
 * style="text-align:center;" | 6th
 * Re-elected in 1965.
 * style="text-align:center;" | 5
 * December 30, 1969
 * September 23, 1972
 * style="text-align:center;" | 7th
 * style="color:inherit;background:;" |
 * José J. Leido Jr.
 * Nacionalista
 * Elected in 1969. Removed from office after imposition of martial law.
 * colspan="9" style="text-align:center;" | District dissolved into the twenty-seat Region IV-A's at-large district for the Interim Batasang Pambansa.
 * September 23, 1972
 * style="text-align:center;" | 7th
 * style="color:inherit;background:;" |
 * José J. Leido Jr.
 * Nacionalista
 * Elected in 1969. Removed from office after imposition of martial law.
 * colspan="9" style="text-align:center;" | District dissolved into the twenty-seat Region IV-A's at-large district for the Interim Batasang Pambansa.
 * colspan="9" style="text-align:center;" | District dissolved into the twenty-seat Region IV-A's at-large district for the Interim Batasang Pambansa.
 * rowspan=2 |
 * rowspan=2 |
 * - style="height:3em"
 * colspan="14" style="text-align:center;" |
 * colspan="14" style="text-align:center;" |

Oriental Mindoro's at-large district for the Regular Batasang Pambansa

 * colspan="14" style="text-align:center;" | District re-created February 1, 1984.
 * - style="height:3em"
 * style="text-align:center;" | –
 * July 23, 1984
 * March 25, 1986
 * style="text-align:center;" | 2nd
 * style="color:inherit;background:;" |
 * Rolleo L. Ignacio
 * UNIDO
 * Elected in 1984.
 * style="color:inherit;background:;" |
 * Jose Reynaldo V. Morente
 * KBL
 * Elected in 1984.
 * colspan="14" style="text-align:center;" | District dissolved into Oriental Mindoro's 1st and 2nd districts.
 * }
 * Elected in 1984.
 * colspan="14" style="text-align:center;" | District dissolved into Oriental Mindoro's 1st and 2nd districts.
 * }
 * }