Agusan's at-large congressional district

Agusan's at-large congressional district may refer to several occasions when a provincewide at-large district was used for elections to Philippine national legislatures from the formerly undivided province of Agusan.

Agusan was created as a special province from territories previously organized under Surigao and parts of Misamis in 1907. As a special province, Agusan was under the direct supervision of the Department of the Interior Bureau of Non-Christian Tribes and was unrepresented in the Philippine Assembly. In 1913, the province was transferred to the direct control and jurisdiction of the Department of Mindanao and Sulu whose representatives to the national legislature were appointed by the Governor General as one at-large district beginning with the 4th Philippine Legislature in 1916. In 1934 following the passage of the Tydings–McDuffie Act, Agusan elected its own delegate for the first time to the 1934 Philippine Constitutional Convention which was charged with the drafting of a new constitution for the Commonwealth of the Philippines. The province then began to send a representative to the Commonwealth National Assembly from its single-member at-large district created under the 1935 constitution.

Agusan was also represented in the Second Republic National Assembly during the Pacific War. It also elected a representative to the restored House of Representatives and to the first six congresses of the Third Philippine Republic. After the 1967 division of Agusan, the district was abolished and replaced by Agusan del Norte's and Agusan del Sur's at-large districts.

Representation history
{| class=wikitable ! rowspan=2 | # ! colspan=2 | Term of office ! rowspan=2 | National Assembly ! 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;" |

Agusan's at-large district for the National Assembly (Commonwealth of the Philippines)
! rowspan=2 | # ! colspan=2 | Term of office ! rowspan=2 | National Assembly ! 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 February 8, 1935.
 * rowspan="2" style="text-align:center;" | 1
 * rowspan="2" | September 16, 1935
 * rowspan="2" | December 30, 1941
 * style="text-align:center;" | 1st
 * rowspan=2 |
 * style="color:inherit;background:;" |
 * rowspan="2" | Apolonio D. Curato
 * Nacionalista Demócrata Pro-Independencia (nominal) Liga Popular Aguseña
 * Elected in 1935.
 * style="text-align:center;" | 2nd
 * style="color:inherit;background:;" |
 * Nacionalista Liga Popular Aguseña
 * Re-elected in 1938.
 * style="color:inherit;background:;" |
 * Nacionalista Liga Popular Aguseña
 * Re-elected in 1938.
 * rowspan=2 |
 * rowspan=2 |
 * - style="height:3em"
 * colspan="14" style="text-align:center;" |
 * colspan="14" style="text-align:center;" |

Agusan's at-large district for the National Assembly (Second Philippine Republic)
! rowspan=2 | # ! colspan=2 | Term of office ! rowspan=2 | Common wealth Congress ! colspan=4 | Single seat !Start!!End ! colspan="2" style="text-align:center;" | Member ! Party ! Electoral history
 * colspan="14" style="text-align:center;" | District re-created September 7, 1943.
 * style="text-align:center;" | –
 * September 25, 1943
 * February 2, 1944
 * style="text-align:center;" | 3rd
 * style="color:inherit;background:;" |
 * Elisa Ochoa
 * KALIBAPI
 * Elected in 1943.
 * style="color:inherit;background:;" |
 * Ramón Z. Aguirre
 * KALIBAPI
 * Appointed as an ex officio member.
 * style="color:inherit;background:;" |
 * Ramón Z. Aguirre
 * KALIBAPI
 * Appointed as an ex officio member.
 * rowspan=2 |
 * rowspan=16 colspan=5 style="text-align:center;" | Seats eliminated
 * - style="height:3em"
 * colspan="9" style="text-align:center;" |
 * colspan="9" style="text-align:center;" |

Agusan's at-large district for the House of Representatives of the Commonwealth of the Philippines
! 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
 * colspan="9" style="text-align:center;" | District re-created May 24, 1945.
 * style="text-align:center;" | 2
 * June 11, 1945
 * May 25, 1946
 * style="text-align:center;" | 1st
 * style="color:inherit;background:;" |
 * Elisa Ochoa
 * Nacionalista
 * Elected in 1941.
 * Elisa Ochoa
 * Nacionalista
 * Elected in 1941.
 * rowspan=2 |
 * - style="height:3em"
 * colspan="9" style="text-align:center;" |
 * colspan="9" style="text-align:center;" |

Agusan's at-large district for the House of Representatives of the Philippines

 * rowspan="2" style="text-align:center;" | 3
 * rowspan="2" | May 25, 1946
 * rowspan="2" | December 30, 1953
 * style="text-align:center;" | 1st
 * rowspan=6 |
 * rowspan="2" style="color:inherit;background:;" |
 * rowspan="2" | Marcos M. Calo
 * rowspan="2" | Liberal
 * Elected in 1946.
 * style="text-align:center;" | 2nd
 * Re-elected in 1949.
 * rowspan="3" style="text-align:center;" | 4
 * rowspan="3" | December 30, 1953
 * rowspan="3" | December 30, 1965
 * style="text-align:center;" | 3rd
 * rowspan="3" style="color:inherit;background:;" |
 * rowspan="3" | Guillermo R. Sánchez
 * rowspan="3" | Nacionalista
 * Elected in 1953.
 * style="text-align:center;" | 4th
 * Re-elected in 1957.
 * style="text-align:center;" | 5th
 * Re-elected in 1961.
 * style="text-align:center;" | 5
 * December 30, 1965
 * December 30, 1969
 * style="text-align:center;" | 6th
 * style="color:inherit;background:;" |
 * José C. Aquino
 * Liberal
 * Elected in 1965.
 * colspan="9" style="text-align:center;" | District dissolved into Agusan del Norte's and Agusan del Sur's at-large districts.
 * }
 * style="color:inherit;background:;" |
 * José C. Aquino
 * Liberal
 * Elected in 1965.
 * colspan="9" style="text-align:center;" | District dissolved into Agusan del Norte's and Agusan del Sur's at-large districts.
 * }
 * }