Gipuzkoa () is one of the 52 constituencies represented in the Congress of Deputies, the lower chamber of the Spanish parliament, the . The constituency (whose boundaries correspond to those of the homonymous province) currently elects six deputies. The electoral system uses the D'Hondt method and closed-list proportional voting, with a minimum threshold of three percent.

Electoral system The constituency was created as per the Political Reform Law and was first contested in the 1977 general election. The Law provided for the provinces of Spain to be established as multi-member districts in the Congress of Deputies,. with this regulation being maintained under the Spanish Constitution of 1978.. Additionally, the Constitution requires for any modification of the provincial limits to be approved under an organic law, needing an absolute majority in the Cortes Generales..

Voting is based on universal suffrage, comprising all Spanish nationals over 18 years of age with full political rights, provided that they have not been deprived of the right to vote by a final sentence.. The only exception was in 1977, when this was limited to nationals over 21 years of age and in full enjoyment of their political and civil rights.; . Amendments in 2011 required non-resident citizens to apply for voting, a system known as "begged" voting ().. which was abolished in 2022. Further, amendments in 2018 granted the right to vote to those legally incapacitated. The Congress of Deputies has a minimum of 300 and a maximum of 400 seats, with electoral provisions fixing its size at 350. Of these, 348 are elected in 50 multi-member constituencies corresponding to the provinces of Spain—each of which is assigned an initial minimum of two seats and the remaining 248 distributed in proportion to population—using the D'Hondt method and closed-list proportional voting, with a three percent-threshold of valid votes (including blank ballots) in each constituency. The remaining two seats are allocated to Ceuta and Melilla as single-member districts elected by plurality voting.; ; ; . The use of this electoral method may result in a higher effective threshold depending on district magnitude and vote distribution. The law does not provide for by-elections to fill vacant seats; instead, any vacancies arising after the proclamation of candidates and during the legislative term are filled by the next candidates on the party lists or, when required, by designated substitutes.; .

The electoral law allows for parties and federations registered in the interior ministry, alliances and groupings of electors to present lists of candidates. Parties and federations intending to form an alliance are required to inform the relevant electoral commission within 10 days of the election call—15 before 1985—whereas groupings of electors need to secure the signature of at least one percent of the electorate in the constituencies for which they seek election—one permille of the electorate, with a compulsory minimum of 500 signatures, until 1985—disallowing electors from signing for more than one list. Also since 2011, parties, federations or alliances that have not obtained a mandate in either chamber of the at the preceding election are required to secure the signature of at least 0.1 percent of electors in the aforementioned constituencies.; . Amendments in 2007 required a balanced composition of men and women in the electoral lists, so that candidates of either sex made up at least 40 percent of the total composition; further amendments in 2024 required the use of a zipper system..

Deputies Deputies 1977–present Legislature Election Distribution Constituent 1977 1 3 3 1st 1979 1 1 2 2 1 2nd 1982 1 1 2 3 3rd 1986 2 1 2 2 4th 1989 2 1 2 1 1 5th 1993 1 2 1 1 1 6th 1996 1 2 1 1 1 7th 2000 1 1 2 2 8th 2004 2 1 2 1 9th 2008 3 2 1 10th 2011 3 1 1 1 11th 2015 1 2 1 2 12th 2016 1 2 1 2 13th 2019 (Apr) 2 1 1 2 14th 2019 (Nov) 2 1 1 2 15th 2023 2 2 2

General elections 2023 + Summary of the 23 July 2023 Congress of Deputies election results in Gipuzkoa Parties and alliances Popular vote Seats Votes % ±pp Total +/− Basque Country Gather (EH Bildu) 117,321 31.15 +5.31 2 ±0 Socialist Party of the Basque Country–Basque Country Left (PSE–EE (PSOE)) 87,709 23.29 +5.18 2 +1 Basque Nationalist Party (EAJ/PNV) 85,026 22.58 –7.92 2 ±0 Unite (Sumar)1 40,081 10.64 –4.34 0 –1 People's Party (PP) 32,721 8.69 +2.52 0 ±0 Vox (Vox) 7,877 2.09 +0.19 0 ±0 Animalist Party with the Environment (PACMA)2 1,568 0.42 –0.12 0 ±0 Blank Seats to Leave Empty Seats (EB) 933 0.25 +0.10 0 ±0 Workers' Front (FO) 530 0.14 New 0 ±0 Zero Cuts (Recortes Cero) 442 0.12 –0.01 0 ±0 Communist Party of the Workers of the Basque Country (PCTE/ELAK) 259 0.07 ±0.00 0 ±0 For a Fairer World (PUM+J) 149 0.04 –0.06 0 ±0 Blank ballots 2,005 0.53 +0.03 Total 376,621 6 ±0 Valid votes 376,621 99.38 –0.18 Invalid votes 2,344 0.62 +0.18 Votes cast / turnout 378,965 64.68 –1.11 Abstentions 206,908 35.32 +1.11 Registered voters 585,873 Sources

November 2019 + Summary of the 10 November 2019 Congress of Deputies election results in Gipuzkoa Parties and alliances Popular vote Seats Votes % ±pp Total +/− Basque Nationalist Party (EAJ/PNV) 116,761 30.50 +1.46 2 ±0 Basque Country Gather (EH Bildu) 98,951 25.84 +2.46 2 ±0 Socialist Party of the Basque Country–Basque Country Left (PSE–EE (PSOE)) 69,342 18.11 –0.75 1 ±0 United We Can (Podemos–IU) 57,363 14.98 –2.32 1 ±0 People's Party (PP) 23,619 6.17 +1.12 0 ±0 Vox (Vox) 7,274 1.90 +0.25 0 ±0 Citizens–Party of the Citizenry (Cs) 3,824 1.00 –1.89 0 ±0 Animalist Party Against Mistreatment of Animals (PACMA) 2,070 0.54 –0.23 0 ±0 Blank Seats (EB/AZ) 570 0.15 –0.01 0 ±0 Zero Cuts–Green Group (Recortes Cero–GV) 510 0.13 –0.01 0 ±0 For a Fairer World (PUM+J) 401 0.10 ±0.00 0 ±0 Communist Party of the Workers of the Basque Country (ELAK/PCTE) 276 0.07 –0.01 0 ±0 Blank ballots 1,907 0.50 –0.09 Total 382,868 6 ±0 Valid votes 382,868 99.56 +0.16 Invalid votes 1,678 0.44 –0.16 Votes cast / turnout 384,546 65.79 –5.23 Abstentions 199,915 34.21 +5.23 Registered voters 584,461 Sources

April 2019 + Summary of the 28 April 2019 Congress of Deputies election results in Gipuzkoa Parties and alliances Popular vote Seats Votes % ±pp Total +/− Basque Nationalist Party (EAJ/PNV) 119,668 29.04 +5.78 2 ±0 Basque Country Gather (EH Bildu) 96,364 23.38 +4.27 2 +1 Socialist Party of the Basque Country–Basque Country Left (PSE–EE (PSOE)) 77,720 18.86 +4.78 1 ±0 United We Can (Podemos–IU–Equo Berdeak) 71,296 17.30 –11.31 1 –1 People's Party (PP) 20,797 5.05 –4.61 0 ±0 Citizens–Party of the Citizenry (Cs) 11,892 2.89 –0.31 0 ±0 Vox (Vox) 6,783 1.65 New 0 ±0 Animalist Party Against Mistreatment of Animals (PACMA) 3,171 0.77 +0.01 0 ±0 Blank Seats (EB/AZ) 678 0.16 New 0 ±0 Zero Cuts–Green Group (Recortes Cero–GV) 593 0.14 –0.18 0 ±0 For a Fairer World (PUM+J) 429 0.10 New 0 ±0 Communist Party of the Workers of the Basque Country (ELAK/PCTE) 313 0.08 New 0 ±0 Blank ballots 2,422 0.59 –0.15 Total 412,126 6 ±0 Valid votes 412,126 99.40 –0.06 Invalid votes 2,474 0.60 +0.06 Votes cast / turnout 414,600 71.02 +7.74 Abstentions 169,145 28.98 –7.74 Registered voters 583,745 Sources

2016 + Summary of the 26 June 2016 Congress of Deputies election results in Gipuzkoa Parties and alliances Popular vote Seats Votes % ±pp Total +/− United We Can (Podemos/Ahal Dugu–IU–Equo)1 104,566 28.61 +0.56 2 ±0 Basque Nationalist Party (EAJ/PNV) 85,015 23.26 –0.20 2 ±0 Basque Country Gather (EH Bildu) 69,828 19.11 –1.76 1 ±0 Socialist Party of the Basque Country–Basque Country Left (PSE–EE (PSOE)) 51,449 14.08 +0.79 1 ±0 People's Party (PP) 35,312 9.66 +0.96 0 ±0 Citizens–Party of the Citizenry (C's) 11,683 3.20 –0.55 0 ±0 Animalist Party Against Mistreatment of Animals (PACMA) 2,788 0.76 +0.18 0 ±0 Zero Cuts–Green Group (Recortes Cero–GV) 1,172 0.32 +0.12 0 ±0 Union, Progress and Democracy (UPyD) 478 0.13 –0.21 0 ±0 Communist Party of the Peoples of Spain (PCPE) 284 0.08 New 0 ±0 Libertarian Party (P–LIB) 207 0.06 New 0 ±0 Blank ballots 2,711 0.74 +0.09 Total 365,493 6 ±0 Valid votes 365,493 99.46 –0.02 Invalid votes 1,971 0.54 +0.02 Votes cast / turnout 367,464 63.28 –4.12 Abstentions 213,242 36.72 +4.12 Registered voters 580,706 Sources

2015 + Summary of the 20 December 2015 Congress of Deputies election results in Gipuzkoa Parties and alliances Popular vote Seats Votes % ±pp Total +/− We Can (Podemos/Ahal Dugu) 98,533 25.30 New 2 +2 Basque Nationalist Party (EAJ/PNV) 91,359 23.46 +1.08 2 +1 Basque Country Gather (EH Bildu)1 81,257 20.87 –13.91 1 –2 Socialist Party of the Basque Country–Basque Country Left (PSE–EE (PSOE)) 51,764 13.29 –7.69 1 ±0 People's Party (PP) 33,884 8.70 –5.03 0 –1 Citizens–Party of the Citizenry (C's) 14,608 3.75 New 0 ±0 United Left–Popular Unity in Common (IU–UPeC) 10,722 2.75 –0.62 0 ±0 Animalist Party Against Mistreatment of Animals (PACMA) 2,276 0.58 +0.05 0 ±0 Union, Progress and Democracy (UPyD) 1,313 0.34 –1.19 0 ±0 Zero Cuts–Green Group (Recortes Cero–GV) 782 0.20 New 0 ±0 Navarrese Freedom (Ln) 368 0.09 New 0 ±0 Blank ballots 2,537 0.65 –0.48 Total 389,403 6 ±0 Valid votes 389,403 99.48 +0.32 Invalid votes 2,030 0.52 –0.32 Votes cast / turnout 391,433 67.40 +1.85 Abstentions 189,292 32.60 –1.85 Registered voters 580,725 Sources

2011 + Summary of the 20 November 2011 Congress of Deputies election results in Gipuzkoa Parties and alliances Popular vote Seats Votes % ±pp Total +/− Amaiur (Amaiur)1 130,055 34.78 +21.72 3 +3 Basque Nationalist Party (EAJ/PNV) 83,703 22.38 –1.38 1 –1 Socialist Party of the Basque Country–Basque Country Left (PSE–EE (PSOE)) 78,462 20.98 –18.02 1 –2 People's Party (PP) 51,362 13.73 –0.87 1 ±0 United Left–The Greens: Plural Left (IU–LV) 12,595 3.37 –1.45 0 ±0 Union, Progress and Democracy (UPyD) 5,734 1.53 +0.73 0 ±0 Equo (Equo) 4,390 1.17 New 0 ±0 Animalist Party Against Mistreatment of Animals (PACMA) 1,990 0.53 +0.20 0 ±0 For a Fairer World (PUM+J) 1,038 0.28 +0.08 0 ±0 Communist Unification of Spain (UCE) 399 0.11 New 0 ±0 Blank ballots 4,239 1.13 –1.16 Total 373,967 6 ±0 Valid votes 373,967 99.16 +0.05 Invalid votes 3,152 0.84 –0.05 Votes cast / turnout 377,119 65.55 +8.17 Abstentions 198,215 34.45 –8.17 Registered voters 575,334 Sources

2008 + Summary of the 9 March 2008 Congress of Deputies election results in Guipúzcoa Parties and alliances Popular vote Seats Votes % ±pp Total +/− Socialist Party of the Basque Country–Basque Country Left (PSE–EE (PSOE)) 127,840 39.00 +12.69 3 +1 Basque Nationalist Party (EAJ/PNV) 77,903 23.76 –7.20 2 ±0 People's Party (PP) 47,858 14.60 –0.66 1 ±0 Basque Solidarity (EA) 25,455 7.77 –3.76 0 –1 Aralar (Aralar) 17,332 5.29 –0.71 0 ±0 United Left–Greens–Alternative (EB–B) 15,812 4.82 –2.87 0 ±0 Union, Progress and Democracy (UPyD) 2,620 0.80 New 0 ±0 The Greens (B/LV) 2,003 0.61 New 0 ±0 Anti-Bullfighting Party Against Mistreatment of Animals (PACMA) 1,089 0.33 New 0 ±0 For a Fairer World (PUM+J) 642 0.20 New 0 ±0 Family and Life Party (PFyV) 422 0.13 New 0 ±0 Engine and Sports Alternative (AMD) 375 0.11 New 0 ±0 Carlist Party of the Basque Country–Carlist Party (EKA–PC) 240 0.07 +0.01 0 ±0 Humanist Party (PH) 203 0.06 –0.25 0 ±0 Citizens–Party of the Citizenry (C's) 185 0.06 New 0 ±0 National Democracy (DN) 131 0.04 –0.03 0 ±0 Spanish Phalanx of the CNSO (FE de las JONS) 85 0.03 ±0.00 0 ±0 Spanish Alternative (AES) 63 0.02 New 0 ±0 Liberal Centrist Union (UCL) 44 0.01 New 0 ±0 Blank ballots 7,513 2.29 +0.81 Total 327,815 6 ±0 Valid votes 327,815 99.11 +10.80 Invalid votes 2,958 0.89 –10.80 Votes cast / turnout 330,773 57.38 –15.17 Abstentions 245,728 42.62 +15.17 Registered voters 576,501 Sources

2004