Lanao's at-large congressional district

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

The single-member district was first created ahead of the 1935 Philippine legislative election following the 1934 constitutional convention where voters had been selected in electing a delegate for the province. Lanao had been admitted as a special province under the Department of Mindanao and Sulu since 1914 but was only previously represented through a multi-member delegation appointed by the Governor General covering all of Mindanao territory except Misamis and Surigao beginning in 1916. The district encompassed the entire territory formerly known as the Lanao District that was previously organized under Moro Province in 1903 from the same Spanish politico-military district (Distrito Septimo de Lanao) that existed since the late 19th century.

Tomás Cabili of the Nacionalista Demócrata Pro-Independencia was elected as the district's first representative in 1935 by a select group of electors composed of municipal and municipal district presidents, vice-presidents and councilors, among others. The first time a representative from the province was elected through popular vote was during the succeeding 1938 Philippine legislative election after the passage of Commonwealth Act No. 44 in 1936 which removed the restrictions on qualified voters in the former Bureau of Non-Christian Tribes-designated jurisdiction.

Lanao was also represented in the Second Republic National Assembly by two members during the Pacific War. It reverted to single-member representation for the restored Commonwealth and subsequent Third Republic House of Representatives. It continued to elect representatives until it was made obsolete by the 1959 division of Lanao into two provinces with separate congressional districts beginning in 1961.

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;" |

Lanao'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 from Mindanao and Sulu's at-large district.
 * 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" | Tomás Cabili
 * Nacionalista Demócrata Pro-Independencia
 * Elected in 1935.
 * style="text-align:center;" | 2nd
 * style="color:inherit;background:;" |
 * Nacionalista
 * Re-elected in 1938.
 * style="color:inherit;background:;" |
 * Nacionalista
 * Re-elected in 1938.
 * rowspan=2 |
 * rowspan=2 |
 * - style="height:3em"
 * colspan="14" style="text-align:center;" |
 * colspan="14" style="text-align:center;" |

Lanao'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;" | 1st
 * style="color:inherit;background:;" |
 * Bato Ali
 * KALIBAPI
 * Elected in 1943.
 * style="color:inherit;background:;" |
 * Ciriaco B. Raval
 * KALIBAPI
 * Appointed as an ex officio member.
 * style="color:inherit;background:;" |
 * Ciriaco B. Raval
 * KALIBAPI
 * Appointed as an ex officio member.
 * rowspan=2 |
 * rowspan=15 colspan=5 style="text-align:center;" | Seats eliminated
 * - style="height:3em"
 * colspan="9" style="text-align:center;" |
 * colspan="9" style="text-align:center;" |

Lanao'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 9, 1945
 * May 25, 1946
 * style="text-align:center;" | 1st
 * style="color:inherit;background:;" |
 * Salvador T. Lluch
 * Nacionalista
 * Elected in 1941.
 * Salvador T. Lluch
 * Nacionalista
 * Elected in 1941.
 * rowspan=2 |
 * - style="height:3em"
 * colspan="9" style="text-align:center;" |
 * colspan="9" style="text-align:center;" |

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

 * style="text-align:center;" | 3
 * May 25, 1946
 * December 30, 1949
 * style="text-align:center;" | 1st
 * rowspan=6 |
 * style="color:inherit;background:;" |
 * Manalao A. Mindalano
 * Nacionalista
 * Elected in 1946.
 * style="text-align:center;" | 4
 * December 30, 1949
 * December 30, 1953
 * style="text-align:center;" | 2nd
 * style="color:inherit;background:;" |
 * Mohammad Ali B. Dimaporo
 * Liberal
 * Elected in 1949.
 * style="text-align:center;" | 5
 * December 30, 1953
 * December 30, 1955
 * rowspan="3" style="text-align:center;" | 3rd
 * style="color:inherit;background:;" |
 * Domocao Alonto
 * Nacionalista
 * Elected in 1953. Resigned on election as senator.
 * style="text-align:center;" | –
 * December 30, 1955
 * May 21, 1957
 * vacant
 * No special election held to fill vacancy pending result of electoral protest against Alonto.
 * style="text-align:center;" | (4)
 * May 21, 1957
 * December 30, 1957
 * style="color:inherit;background:;" |
 * Mohammad Ali B. Dimaporo
 * Liberal
 * Declared winner of 1953 elections.
 * style="text-align:center;" | 6
 * December 30, 1957
 * December 30, 1961
 * style="text-align:center;" | 4th
 * style="color:inherit;background:;" |
 * Laurentino Ll. Badelles
 * Nacionalista
 * Elected in 1957. Redistricted to Lanao del Norte's at-large district.
 * colspan="9" style="text-align:center;" | District dissolved into Lanao del Norte's and Lanao del Sur's at-large districts.
 * }
 * December 30, 1961
 * style="text-align:center;" | 4th
 * style="color:inherit;background:;" |
 * Laurentino Ll. Badelles
 * Nacionalista
 * Elected in 1957. Redistricted to Lanao del Norte's at-large district.
 * colspan="9" style="text-align:center;" | District dissolved into Lanao del Norte's and Lanao del Sur's at-large districts.
 * }
 * }