Davao del Sur's at-large congressional district

Davao del Sur's at-large congressional district is the sole congressional district of the Philippines in the province of Davao del Sur. It was originally created by the 1967 division of the old Davao province and was eliminated following the 1972 abolition of the House of Representatives. The district was restored as a plural member district for the 1984 national parliament known as the Batasang Pambansa but was reconfigured after Davao City gained its own representation. It was eliminated again following the 1987 reapportionment that created an additional district. The district's current configuration dates from 2013 when Davao del Sur lost a seat following the creation of the province of Davao Occidental covering much of its 2nd district. The district is represented in the 19th Congress by John Tracy Cagas of the Nacionalista Party (NP).

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;" |

Davao del Sur'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 May 8, 1967 from Davao's at-large district.
 * rowspan="2" style="text-align:center;" | 1
 * rowspan="2" | January 22, 1968
 * rowspan="2" | September 23, 1972
 * style="text-align:center;" | 6th
 * rowspan="2" |
 * rowspan="2" style="color:inherit;background:;" |
 * rowspan="2" | Artemio A. Loyola
 * rowspan="2" | Nacionalista
 * Elected in 1967 special election.
 * style="text-align:center;" | 7th
 * Re-elected in 1969. Removed from office after imposition of martial law.
 * colspan="9" style="text-align:center;" | District dissolved into the ten-seat Region XI's at-large district for the Interim Batasang Pambansa.
 * style="text-align:center;" | 7th
 * Re-elected in 1969. Removed from office after imposition of martial law.
 * colspan="9" style="text-align:center;" | District dissolved into the ten-seat Region XI's at-large district for the Interim Batasang Pambansa.
 * colspan="9" style="text-align:center;" | District dissolved into the ten-seat Region XI'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;" |

Davao del Sur's at-large district for the Regular Batasang Pambansa
! 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="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:;" |
 * Alejandro Almendras
 * KBL
 * Elected in 1984.
 * style="color:inherit;background:;" |
 * Douglas R. Cagas
 * PDP–Laban
 * Elected in 1984.
 * colspan="14" style="text-align:center;" | District dissolved into Davao del Sur's 1st and 2nd districts.
 * PDP–Laban
 * Elected in 1984.
 * colspan="14" style="text-align:center;" | District dissolved into Davao del Sur's 1st and 2nd districts.
 * colspan="14" style="text-align:center;" | District dissolved into Davao del Sur's 1st and 2nd districts.
 * rowspan=2 |
 * rowspan=99 colspan=5 style="text-align:center;" | Seats eliminated
 * - style="height:3em"
 * colspan="9" style="text-align:center;" |
 * colspan="9" style="text-align:center;" |

Davao del Sur's at-large district for the House of Representatives of the Philippines

 * colspan="9" style="text-align:center;" | District re-created January 14, 2013.
 * rowspan="2" style="text-align:center;" | 2
 * rowspan="2" | June 30, 2016
 * rowspan="2" | June 30, 2022
 * style="text-align:center;" | 17th
 * rowspan=99 |
 * rowspan="2" style="color:inherit;background:;" |
 * rowspan="2" | Mercedes C. Cagas
 * rowspan="2" | Nacionalista
 * Redistricted from the 1st district and re-elected in 2016.
 * style="text-align:center;" | 18th
 * Re-elected in 2019.
 * style="text-align:center;" | 3
 * June 30, 2022
 * Incumbent
 * style="text-align:center;" | 19th
 * style="background: |
 * John Tracy F. Cagas
 * Nacionalista
 * Elected in 2022.
 * }
 * John Tracy F. Cagas
 * Nacionalista
 * Elected in 2022.
 * }