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

General elections 2023 + Summary of the 23 July 2023 Congress of Deputies election results in Tarragona Parties and alliances Popular vote Seats Votes % ±pp Total +/− Socialists' Party of Catalonia (PSC–PSOE) 121,126 32.91 +13.80 2 +1 Republican Left of Catalonia (ERC) 55,461 15.07 –10.56 1 –1 People's Party (PP) 51,061 13.87 +6.11 1 ±0 Unite–In Common We Can (Sumar–ECP)2 41,719 11.34 –0.76 1 ±0 Together for Catalonia (Junts)1 40,791 11.08 n/a 1 +1 Vox (Vox) 38,039 10.34 +2.26 0 ±0 Popular Unity Candidacy–For Rupture (CUP–PR) 8,700 2.36 –3.38 0 ±0 Animalist Party with the Environment (PACMA)3 3,797 1.03 –0.16 0 ±0 Catalan European Democratic Party–CiU Space (PDeCAT–E–CiU)1 2,311 0.63 n/a 0 –1 Workers' Front (FO) 661 0.18 New 0 ±0 Communist Party of the Workers of Catalonia (PCTC) 405 0.11 +0.06 0 ±0 Zero Cuts (Recortes Cero) 267 0.07 –0.07 0 ±0 Catalonia Among Neighbors (EVR) 265 0.07 New 0 ±0 United Yes (Unidos SI) 253 0.07 New 0 ±0 Blank ballots 3,168 0.86 +0.16 Total 368,024 6 ±0 Valid votes 368,024 98.82 –0.49 Invalid votes 4,402 1.18 +0.49 Votes cast / turnout 372,426 62.42 –5.09 Abstentions 224,263 37.58 +5.09 Registered voters 596,689 Sources

November 2019 + Summary of the 10 November 2019 Congress of Deputies election results in Tarragona Parties and alliances Popular vote Seats Votes % ±pp Total +/− Republican Left of Catalonia–Sovereigntists (ERC–Sobiranistes) 98,782 25.63 –1.60 2 ±0 Socialists' Party of Catalonia (PSC–PSOE) 73,641 19.11 –2.33 2 +1 Together for Catalonia–Together (JxCat–Junts) 51,461 13.35 +1.10 1 ±0 In Common We Can–Let's Win the Change (ECP–Guanyem el Canvi) 46,644 12.10 –0.09 1 ±0 Vox (Vox) 31,124 8.08 +3.27 0 ±0 People's Party (PP) 29,923 7.76 +2.65 0 ±0 Citizens–Party of the Citizenry (Cs) 22,814 5.92 –6.61 0 –1 Popular Unity Candidacy–For Rupture (CUP–PR) 22,129 5.74 New 0 ±0 Animalist Party Against Mistreatment of Animals (PACMA) 4,588 1.19 –0.29 0 ±0 Zero Cuts–Green Group (Recortes Cero–GV) 533 0.14 +0.03 0 ±0 For a Fairer World (PUM+J) 351 0.09 +0.02 0 ±0 Left in Positive (IZQP) 343 0.09 +0.04 0 ±0 Communist Party of the Workers of Catalonia (PCTC) 191 0.05 –0.06 0 ±0 Communist Party of the Catalan People (PCPC) 180 0.05 –0.01 0 ±0 Blank ballots 2,715 0.70 +0.17 Total 385,419 6 ±0 Valid votes 385,419 99.31 –0.08 Invalid votes 2,669 0.69 +0.08 Votes cast / turnout 388,088 67.51 –6.08 Abstentions 186,778 32.49 +6.08 Registered voters 574,866 Sources

April 2019 + Summary of the 28 April 2019 Congress of Deputies election results in Tarragona Parties and alliances Popular vote Seats Votes % ±pp Total +/− Republican Left of Catalonia–Sovereigntists (ERC–Sobiranistes) 113,887 27.23 +7.57 2 +1 Socialists' Party of Catalonia (PSC–PSOE) 89,650 21.44 +5.78 1 ±0 Citizens–Party of the Citizenry (Cs) 52,395 12.53 +1.19 1 ±0 Together for Catalonia–Together (JxCat–Junts)1 51,239 12.25 –1.45 1 ±0 In Common We Can–Let's Win the Change (ECP–Guanyem el Canvi) 50,979 12.19 –9.67 1 ±0 People's Party (PP) 21,376 5.11 –9.76 0 –1 Vox (Vox) 20,105 4.81 New 0 ±0 Free People–We Are Alternative–Pirates: Republican Front (Front Republicà) 8,234 1.97 New 0 ±0 Animalist Party Against Mistreatment of Animals (PACMA) 6,189 1.48 –0.17 0 ±0 Communist Party of the Workers of Catalonia (PCTC) 471 0.11 New 0 ±0 Zero Cuts–Green Group (Recortes Cero–GV) 462 0.11 –0.14 0 ±0 For a Fairer World (PUM+J) 280 0.07 New 0 ±0 Convergents (CNV) 263 0.06 New 0 ±0 Communist Party of the Catalan People (PCPC) 260 0.06 –0.06 0 ±0 Left in Positive (IZQP) 200 0.05 New 0 ±0 Blank ballots 2,202 0.53 –0.36 Total 418,192 6 ±0 Valid votes 418,192 99.39 +0.32 Invalid votes 2,580 0.61 –0.32 Votes cast / turnout 420,772 73.59 +11.80 Abstentions 151,028 26.41 –11.80 Registered voters 571,800 Sources

2016 + Summary of the 26 June 2016 Congress of Deputies election results in Tarragona Parties and alliances Popular vote Seats Votes % ±pp Total +/− In Common We Can–Let's Win the Change (ECP) 75,328 21.86 +1.22 1 ±0 Republican Left–Catalonia Yes (ERC–CatSí) 67,759 19.66 +2.17 1 ±0 Socialists' Party of Catalonia (PSC–PSOE) 53,967 15.66 –0.13 1 ±0 People's Party (PP) 51,241 14.87 +2.64 1 ±0 Democratic Convergence of Catalonia (CDC)1 47,226 13.70 –1.59 1 ±0 Citizens–Party of the Citizenry (C's) 39,082 11.34 –2.90 1 ±0 Animalist Party Against Mistreatment of Animals (PACMA) 5,680 1.65 +0.53 0 ±0 Zero Cuts–Green Group (Recortes Cero–GV) 853 0.25 +0.01 0 ±0 Communist Party of the Catalan People (PCPC) 424 0.12 –0.07 0 ±0 Blank ballots 3,060 0.89 +0.17 Total 344,620 6 ±0 Valid votes 344,620 99.07 –0.05 Invalid votes 3,241 0.93 +0.05 Votes cast / turnout 347,861 61.79 –5.10 Abstentions 215,129 38.21 +5.10 Registered voters 562,990 Sources

2015 + Summary of the 20 December 2015 Congress of Deputies election results in Tarragona Parties and alliances Popular vote Seats Votes % ±pp Total +/− In Common We Can (En Comú)1 77,036 20.64 +15.29 1 +1 Republican Left of Catalonia–Catalonia Yes (ERC–CatSí) 65,272 17.49 +10.07 1 +1 Socialists' Party of Catalonia (PSC–PSOE) 58,922 15.79 –10.31 1 –1 Democracy and Freedom (DiL)2 57,071 15.29 –15.24 1 –1 Citizens–Party of the Citizenry (C's) 53,152 14.24 New 1 +1 People's Party (PP) 45,619 12.23 –11.41 1 –1 Democratic Union of Catalonia (unio.cat) 6,324 1.69 New 0 ±0 Animalist Party Against Mistreatment of Animals (PACMA) 4,170 1.12 +0.50 0 ±0 Zero Cuts–Green Group (Recortes Cero–GV) 894 0.24 New 0 ±0 Communist Party of the Catalan People (PCPC) 705 0.19 –0.02 0 ±0 Union, Progress and Democracy (UPyD) 686 0.18 –0.88 0 ±0 Blank Seats (EB) 625 0.17 –0.71 0 ±0 Blank ballots 2,684 0.72 –1.33 Total 373,160 6 ±0 Valid votes 373,160 99.12 +0.97 Invalid votes 3,324 0.88 –0.97 Votes cast / turnout 376,484 66.89 +3.22 Abstentions 186,315 33.11 –3.22 Registered voters 562,799 Sources

2011 + Summary of the 20 November 2011 Congress of Deputies election results in Tarragona Parties and alliances Popular vote Seats Votes % ±pp Total +/− Convergence and Union (CiU) 105,846 30.53 +9.40 2 +1 Socialists' Party of Catalonia (PSC–PSOE) 90,496 26.10 –18.82 2 –2 People's Party (PP) 81,977 23.64 +5.87 2 +1 Republican Left of Catalonia–Rally–Catalonia Yes (ERC–RI.cat) 25,724 7.42 –1.98 0 ±0 Initiative for Catalonia Greens–United and Alternative Left: Plural L. (ICV–EUiA) 18,561 5.35 +2.31 0 ±0 Union, Progress and Democracy (UPyD) 3,672 1.06 +0.93 0 ±0 Platform for Catalonia (PxC) 3,097 0.89 New 0 ±0 Blank Seats (EB) 3,046 0.88 +0.77 0 ±0 Animalist Party Against Mistreatment of Animals (PACMA) 2,133 0.62 +0.34 0 ±0 Pirates of Catalonia (Pirata.cat) 1,703 0.49 New 0 ±0 Hartos.org (Hartos.org) 1,069 0.31 New 0 ±0 Anti-capitalists (Anticapitalistas) 880 0.25 New 0 ±0 Communist Party of the Catalan People (PCPC) 712 0.21 +0.07 0 ±0 Left Republican Party–Republicans (PRE–R) 419 0.12 New 0 ±0 Communist Unification of Spain (UCE) 267 0.08 New 0 ±0 Blank ballots 7,106 2.05 +0.69 Total 346,708 6 ±0 Valid votes 346,708 98.15 –1.10 Invalid votes 6,536 1.85 +1.10 Votes cast / turnout 353,244 63.67 –6.20 Abstentions 201,555 36.33 +6.20 Registered voters 554,799 Sources

2008