Tarragona is one of the four constituencies () represented in the Parliament of Catalonia, the regional legislature of the autonomous community of Catalonia. The constituency currently elects 18 deputies. Its boundaries correspond to those of the Spanish province of Tarragona. The electoral system uses the D'Hondt method and closed-list proportional representation, with a minimum threshold of three percent.

Electoral system The constituency was created as per the Statute of Autonomy of Catalonia of 1979 and was first contested in the 1980 regional election. The Statute requires for an electoral law to be passed by a two-thirds supermajority in the Parliament of Catalonia, but transitory provisions provide for the four provinces in Catalonia—Barcelona, Girona, Lleida and Tarragona—to be established as multi-member districts in the Parliament. Each constituency is allocated a fixed number of seats: 85 for Barcelona, 17 for Girona, 15 for Lleida and 18 for Tarragona.

Voting is on the basis of universal suffrage, which comprises all nationals over eighteen, registered in Catalonia and in full enjoyment of their political rights. Amendments to the electoral law in 2011 required for Catalans abroad to apply for voting before being permitted to vote, a system known as "begged" or expat vote () which was abolished in 2022. Seats are elected using the D'Hondt method and a closed list proportional representation, with an electoral threshold of three percent of valid votes—which includes blank ballots—being applied in each constituency. The use of the D'Hondt method may result in a higher effective threshold, depending on the district magnitude.

The electoral law allows for parties and federations registered in the interior ministry, coalitions and groupings of electors to present lists of candidates. Parties and federations intending to form a coalition ahead of an election are required to inform the relevant Electoral Commission within ten days of the election call—fifteen 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-thousandth of the electorate, with a compulsory minimum of 500 signatures, until 1985—disallowing electors from signing for more than one list of candidates.

Deputies Deputies 1980–present Parliament Election Distribution 1st 1980 3 2 4 5 4 2nd 1984 1 5 10 2 3rd 1988 1 1 5 10 1 4th 1992 1 2 5 9 1 5th 1995 1 2 4 9 2 6th 1999 2 6 8 2 7th 2003 1 3 5 7 2 8th 2006 1 3 5 7 2 9th 2010 1 1 4 9 3 10th 2012 1 3 3 1 7 3 11th 2015 1 9 1 2 4 1 12th 2017 1 5 2 4 5 1 13/14th 2021 1 1 5 4 4 1 2 15th 2024 3 6 5 2 2

Regional elections 2024 + Summary of the 12 May 2024 Parliament of Catalonia election results in Tarragona Parties and alliances Popular vote Seats Votes % ±pp Total +/− Socialists' Party of Catalonia (PSC–PSOE) 81,701 25.49 +5.45 6 +2 Together+Carles Puigdemont for Catalonia (Cat–Junts+) 67,937 21.19 +1.81 5 +1 Republican Left of Catalonia (ERC) 51,330 16.01 –8.47 3 –2 People's Party (PP) 37,921 11.83 +7.52 2 +2 Vox (Vox) 32,642 10.18 +0.79 2 ±0 Popular Unity Candidacy–Let's Defend the Land (CUP–DT) 12,942 4.04 –2.75 0 –1 Commons Unite (Comuns Sumar)1 12,381 3.86 –1.06 0 –1 Catalan Alliance (Aliança.cat) 11,206 3.50 New 0 ±0 Animalist Party with the Environment (PACMA) 3,388 1.06 New 0 ±0 Citizens–Party of the Citizenry (Cs) 1,747 0.55 –4.69 0 –1 At the Same Time (Alhora)2 1,082 0.34 +0.14 0 ±0 Workers' Front (FO) 971 0.30 New 0 ±0 Communist Party of the Workers of Catalonia (PCTC) 402 0.13 –0.01 0 ±0 Convergents (CNV) 263 0.08 New 0 ±0 Zero Cuts (Recortes Cero) 257 0.08 –0.22 0 ±0 For a Fairer World (PUM+J) 234 0.07 –0.13 0 ±0 Left for Spain (IZQP–Unidos–DEf)3 186 0.06 –0.09 0 ±0 National Front of Catalonia (FNC) 159 0.05 –0.12 0 ±0 Blank ballots 3,801 1.19 +0.33 Total 320,550 18 ±0 Valid votes 320,550 98.85 +0.92 Invalid votes 3,740 1.15 –0.92 Votes cast / turnout 324,290 53.72 +4.86 Abstentions 279,401 46.28 –4.86 Registered voters 603,691 Sources

2021 + Summary of the 14 February 2021 Parliament of Catalonia election results in Tarragona Parties and alliances Popular vote Seats Votes % ±pp Total +/− Republican Left of Catalonia (ERC) 68,095 24.48 +0.75 5 ±0 Socialists' Party of Catalonia (PSC–PSOE) 55,755 20.04 +8.27 4 +2 Together for Catalonia (JxCat)1 53,917 19.38 n/a 4 +2 Vox (Vox) 26,126 9.39 New 2 +2 Popular Unity Candidacy–A New Cycle to Win (CUP–G) 18,896 6.79 +2.79 1 +1 Citizens–Party of the Citizenry (Cs) 14,566 5.24 –22.11 1 –4 In Common We Can–We Can In Common (ECP–PEC)2 13,687 4.92 –0.43 1 ±0 People's Party (PP) 11,992 4.31 –0.26 0 –1 Catalan European Democratic Party (PDeCAT)1 7,726 2.78 n/a 0 –2 We Are the Ebre Lands (Som Terres de l'Ebre) 1,415 0.51 New 0 ±0 Zero Cuts–Green Group–Municipalists (Recortes Cero–GV–M) 827 0.30 +0.12 0 ±0 For a Fairer World (PUM+J) 554 0.20 New 0 ±0 Primaries for the Independence of Catalonia Movement (MPIC) 552 0.20 New 0 ±0 National Front of Catalonia (FNC) 486 0.17 New 0 ±0 United for Democracy+Retirees (Unidos SI–DEf–PDSJE–Somos España) 429 0.15 New 0 ±0 Communist Party of the Workers of Catalonia (PCTC) 381 0.14 New 0 ±0 Nationalist Party of Catalonia (PNC) 292 0.10 New 0 ±0 Red Current Movement (MCR) 94 0.03 New 0 ±0 Blank ballots 2,385 0.86 +0.39 Total 278,175 18 ±0 Valid votes 278,175 97.93 –1.55 Invalid votes 5,893 2.07 +1.55 Votes cast / turnout 284,068 48.86 –29.55 Abstentions 297,378 51.14 +29.55 Registered voters 581,446 Sources

2017 + Summary of the 21 December 2017 Parliament of Catalonia election results in Tarragona Parties and alliances Popular vote Seats Votes % ±pp Total +/− Citizens–Party of the Citizenry (Cs) 120,825 27.35 +7.94 5 +1 Republican Left–Catalonia Yes (ERC–CatSí)1 104,832 23.73 n/a 5 +2 Together for Catalonia (JuntsxCat)1 96,031 21.74 n/a 4 ±0 Socialists' Party of Catalonia (PSC–PSOE) 52,017 11.77 –0.06 2 ±0 Catalonia in Common–We Can (CatComú–Podem)2 23,653 5.35 –1.12 1 ±0 People's Party (PP) 20,188 4.57 –4.35 1 ±0 Popular Unity Candidacy (CUP) 17,687 4.00 –3.39 0 –1 Animalist Party Against Mistreatment of Animals (PACMA) 3,645 0.83 +0.14 0 ±0 Zero Cuts–Green Group (Recortes Cero–GV) 794 0.18 –0.05 0 ±0 Republican Dialogue (Diàleg) 0 0.00 New 0 ±0 Together for Yes (Independents) (JxSí)1 n/a n/a n/a 0 –2 Blank ballots 2,094 0.47 –0.16 Total 441,766 18 ±0 Valid votes 441,766 99.48 +0.06 Invalid votes 2,302 0.52 –0.06 Votes cast / turnout 444,068 78.41 +4.22 Abstentions 122,275 21.59 –4.22 Registered voters 566,343 Sources

2015 + Summary of the 27 September 2015 Parliament of Catalonia election results in Tarragona Parties and alliances Popular vote Seats Votes % ±pp Total +/− Together for Yes (JxSí)1 172,537 41.63 –5.22 9 –1 Citizens–Party of the Citizenry (C's) 80,374 19.39 +12.39 4 +3 Socialists' Party of Catalonia (PSC–PSOE) 49,016 11.83 –1.75 2 –1 People's Party (PP) 36,968 8.92 –6.04 1 –2 Popular Unity Candidacy (CUP) 30,613 7.39 +3.80 1 +1 Catalonia Yes We Can (CatSíqueesPot)2 26,808 6.47 –0.38 1 ±0 Democratic Union of Catalonia (unio.cat) 11,120 2.68 New 0 ±0 Animalist Party Against Mistreatment of Animals (PACMA) 2,862 0.69 +0.11 0 ±0 Zero Cuts–The Greens (Recortes Cero–EV) 965 0.23 New 0 ±0 Let's Win Catalonia (Ganemos) 626 0.15 New 0 ±0 Blank ballots 2,611 0.63 –1.16 Total 414,500 18 ±0 Valid votes 414,500 99.42 +0.71 Invalid votes 2,417 0.58 –0.71 Votes cast / turnout 416,917 74.19 +9.02 Abstentions 145,018 25.81 –9.02 Registered voters 561,935 Sources

2012 + Summary of the 25 November 2012 Parliament of Catalonia election results in Tarragona Parties and alliances Popular vote Seats Votes % ±pp Total +/− Convergence and Union (CiU) 113,657 31.74 –7.58 7 –2 Republican Left of Catalonia–Catalonia Yes (ERC–CatSí) 54,093 15.11 +6.60 3 +2 People's Party (PP) 53,591 14.96 +1.59 3 ±0 Socialists' Party of Catalonia (PSC–PSOE) 48,642 13.58 –4.65 3 –1 Citizens–Party of the Citizenry (C's) 26,039 7.27 +4.54 1 +1 Initiative for Catalonia Greens–United and Alternative Left (ICV–EUiA) 24,538 6.85 +1.77 1 ±0 Popular Unity Candidacy–Left Alternative (CUP) 12,840 3.59 New 0 ±0 Catalan Solidarity for Independence (SI) 5,493 1.53 –1.88 0 ±0 Platform for Catalonia (PxC) 4,103 1.15 –1.44 0 ±0 Blank Seats (EB) 2,108 0.59 +0.18 0 ±0 Animalist Party Against Mistreatment of Animals (PACMA) 2,065 0.58 +0.25 0 ±0 Union, Progress and Democracy (UPyD) 1,373 0.38 +0.23 0 ±0 Hartos.org (Hartos.org) 1,323 0.37 New 0 ±0 Pirates of Catalonia (Pirata.cat) 1,199 0.33 +0.16 0 ±0 Socialists and Republicans (SyR) 333 0.09 New 0 ±0 Communist Unification of Spain (UCE) 287 0.08 +0.05 0 ±0 Blank ballots 6,427 1.79 –0.92 Total 358,111 18 ±0 Valid votes 358,111 98.71 –0.32 Invalid votes 4,681 1.29 +0.32 Votes cast / turnout 362,792 65.17 +8.38 Abstentions 193,910 34.83 –8.38 Registered voters 556,702 Sources

2010 + Summary of the 28 November 2010 Parliament of Catalonia election results in Tarragona Parties and alliances Popular vote Seats Votes % ±pp Total +/− Convergence and Union (CiU) 121,836 39.32 +6.89 9 +2 Socialists' Party of Catalonia (PSC–PSOE) 56,481 18.23 –7.75 4 –1 People's Party (PP) 41,418 13.37 +2.37 3 +1 Republican Left of Catalonia (ERC) 26,355 8.51 –9.11 1 –2 Initiative for Catalonia Greens–United and Alternative Left (ICV–EUiA) 15,747 5.08 –1.43 1 ±0 Catalan Solidarity for Independence (SI) 10,581 3.41 New 0 ±0 Citizens–Party of the Citizenry (C's) 8,453 2.73 +0.31 0 ±0 Platform for Catalonia (PxC) 8,017 2.59 New 0 ±0 Independence Rally (RI.cat) 2,887 0.93 New 0 ±0 Reus Independent Coordinator (CORI) 2,040 0.66 New 0 ±0 The Greens–European Green Group (EV–GVE) 1,501 0.48 New 0 ±0 Blank Seats–Citizens for Blank Votes (EB–CenB)1 1,264 0.41 +0.28 0 ±0 Anti-Bullfighting Party Against Mistreatment of Animals (PACMA) 1,022 0.33 –0.04 0 ±0 Pirates of Catalonia (Pirata.cat) 523 0.17 New 0 ±0 Union, Progress and Democracy (UPyD) 452 0.15 New 0 ±0 From Below (Des de Baix) 371 0.12 New 0 ±0 Pensioners in Action Party (PDLPEA) 335 0.11 New 0 ±0 Internationalist Socialist Workers' Party (POSI) 284 0.09 –0.15 0 ±0 Communist Party of the Catalan People (PCPC) 282 0.09 –0.13 0 ±0 Spanish Phalanx of the CNSO (FE de las JONS) 249 0.08 New 0 ±0 Left Republican Party–Republican Left (PRE–IR) 244 0.08 –0.03 0 ±0 Family and Life Party (PFiV) 227 0.07 –0.04 0 ±0 For a Fairer World (PUM+J) 204 0.07 +0.06 0 ±0 We Are All Equal (GLBTH/TSI) 186 0.06 New 0 ±0 Democratic and Social Centre (CDS) 161 0.05 New 0 ±0 Communist Unification of Spain (UCE) 85 0.03 New 0 ±0 Internationalist Solidarity and Self-Management (SAIn) 82 0.03 New 0 ±0 Republican Social Movement (MSR) 67 0.02 –0.03 0 ±0 Social and Liberal Alternative (ALS) 54 0.02 New 0 ±0 Democratic Web (DW) 46 0.01 New 0 ±0 Blank ballots 8,386 2.68 +0.95 Total 309,840 18 ±0 Valid votes 309,840 99.03 –0.32 Invalid votes 3,042 0.97 +0.32 Votes cast / turnout 312,882 56.79 +2.66 Abstentions 238,029 43.21 –2.66 Registered voters 550,911 Sources

2006