Castellón () is one of the three constituencies () represented in the Corts Valencianes, the regional legislature of the Valencian Community. The constituency currently elects 24 deputies. Its boundaries correspond to those of the Spanish province of Castellón. The electoral system uses the D'Hondt method and closed-list proportional representation, with a minimum threshold of five percent regionally.

Electoral system The constituency was created as per the Statute of Autonomy of the Valencian Community of 1982 and was first contested in the 1983 regional election. The Statute provided for the three provinces in the Valencian Community—Alicante, Castellón and Valencia—to be established as multi-member districts in the Corts Valencianes, with this regulation being maintained under the 1987 regional electoral law. Each constituency is entitled to an initial minimum of 20 seats, with the remaining 39—29 until 2007—being distributed in proportion to their populations (provided that the seat-to-population ratio in any given province did not exceed three times that of any other). The exception was the 1983 election, when each constituency was allocated a fixed number of seats: 29 for Alicante, 25 for Castellón and 35 for Valencia.

Voting is on the basis of universal suffrage, which comprises all nationals over eighteen, registered in the Valencian Community and in full enjoyment of their political rights. Amendments to the electoral law in 2011 required for Valencians 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 a threshold of five percent of valid votes—which includes blank ballots—being applied regionally. Parties not reaching the threshold are not taken into consideration for seat distribution.

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 1983–present Corts Election Distribution 1st 1983 1 14 10 2nd 1987 1 11 3 8 3rd 1991 1 11 1 9 4th 1995 2 8 1 11 5th 1999 1 9 12 6th 2003 1 9 13 7th 2007 2 10 12 8th 2011 1 1 9 13 9th 2015 3 4 6 3 8 10th 2019 2 4 7 4 5 2 11th 2023 3 8 10 3

Regional elections 2023 + Summary of the 28 May 2023 Corts Valencianes election results in Castellón Parties and alliances Popular vote Seats Votes % ±pp Total +/− People's Party (PP) 104,023 35.99 +14.47 10 +5 Socialist Party of the Valencian Country (PSPV–PSOE) 87,364 30.22 +2.63 8 +1 Commitment: Més–Initiative–Greens Equo (Compromís) 37,825 13.09 –1.34 3 –1 Vox (Vox) 37,775 13.07 +2.60 3 +1 United We Can–United Left (Unides Podem–EUPV) 9,328 3.23 –4.55 0 –2 Citizens–Party of the Citizenry (CS) 4,005 1.39 –13.74 0 –4 Centered in Our Land (Centrats) 1,326 0.46 New 0 ±0 Republican Left of the Valencian Country (ERPV) 896 0.31 –0.04 0 ±0 Communist Party of the Peoples of Spain (PCPE) 638 0.22 +0.03 0 ±0 United Coalition (Units) 442 0.15 New 0 ±0 Zero Cuts (Recortes Cero) 409 0.14 New 0 ±0 Alliance for the Commerce and Housing (AlianzaCV) 280 0.10 New 0 ±0 Valencian Republic–European Valencianist Party (RV–PVE) 272 0.09 New 0 ±0 Decide (Decidix) 233 0.08 New 0 ±0 Blank ballots 4,251 1.47 +0.58 Total 289,067 24 ±0 Valid votes 289,067 98.53 +0.14 Invalid votes 4,301 1.47 –0.14 Votes cast / turnout 293,368 68.18 –6.92 Abstentions 136,940 31.82 +6.92 Registered voters 430,308 Sources

2019 + Summary of the 28 April 2019 Corts Valencianes election results in Castellón Parties and alliances Popular vote Seats Votes % ±pp Total +/− Socialist Party of the Valencian Country (PSPV–PSOE) 85,584 27.59 +3.61 7 +1 People's Party (PP) 66,733 21.52 –8.02 5 –3 Citizens–Party of the Citizenry (Cs) 46,941 15.13 +4.06 4 +1 Commitment: Bloc–Initiative–Greens Equo (Compromís) 44,748 14.43 +0.12 4 ±0 Vox (Vox) 32,461 10.47 +10.12 2 +2 United We Can–United Left (Unides Podem–EUPV)1 24,140 7.78 –6.93 2 –1 Animalist Party Against Mistreatment of Animals (PACMA) 3,604 1.16 +0.59 0 ±0 Republican Left of the Valencian Country (ERPV) 1,097 0.35 New 0 ±0 Forward–The Eco-pacifist Greens (Avant/Adelante–LVEP) 784 0.25 New 0 ±0 Communist Party of the Peoples of Spain (PCPE) 576 0.19 +0.08 0 ±0 Democratic People (Poble) 428 0.14 New 0 ±0 Spanish Phalanx of the CNSO (FE–JONS) 300 0.10 –0.05 0 ±0 Blank ballots 2,764 0.89 –0.58 Total 310,167 24 ±0 Valid votes 310,167 98.39 –0.03 Invalid votes 5,077 1.61 +0.03 Votes cast / turnout 315,244 75.10 +4.02 Abstentions 104,527 24.90 –4.02 Registered voters 419,771 Sources

2015 + Summary of the 24 May 2015 Corts Valencianes election results in Castellón Parties and alliances Popular vote Seats Votes % ±pp Total +/− People's Party (PP) 86,136 29.54 –18.52 8 –5 Socialist Party of the Valencian Country (PSPV–PSOE) 69,913 23.98 –7.03 6 –3 Commitment Coalition: Bloc–Initiative–Greens (Compromís) 41,710 14.31 +7.57 4 +3 We Can (Podemos/Podem) 33,680 11.55 New 3 +3 Citizens–Party of the Citizenry (C's) 32,274 11.07 New 3 +3 Citizen Agreement (EUPV–EV–ERPV–AS)1 9,207 3.16 –3.90 0 –1 Citizens of Democratic Centre (CCD) 2,510 0.86 New 0 ±0 Union, Progress and Democracy (UPyD) 2,277 0.78 –1.13 0 ±0 Let's Win Valencian Country (Ganemos) 2,147 0.74 New 0 ±0 Animalist Party Against Mistreatment of Animals (PACMA) 1,662 0.57 +0.24 0 ±0 Spain 2000 (E–2000) 1,557 0.53 –0.49 0 ±0 The Greens–The Ecologist Alternative (EV–AE) 1,149 0.39 New 0 ±0 Vox (Vox) 1,015 0.35 New 0 ±0 We Are Valencian (SOMVAL) 443 0.15 New 0 ±0 Spanish Phalanx of the CNSO (FE–JONS) 426 0.15 New 0 ±0 Communist Party of the Peoples of Spain (PCPE) 330 0.11 –0.07 0 ±0 The National Coalition (LCN) 286 0.10 New 0 ±0 Together (Junts) 272 0.09 New 0 ±0 Zero Cuts (Recortes Cero) 219 0.08 New 0 ±0 Democratic Forum (FDEE) 88 0.03 New 0 ±0 Blank ballots 4,274 1.47 –1.34 Total 291,575 24 ±0 Valid votes 291,575 98.42 +0.48 Invalid votes 4,670 1.58 –0.48 Votes cast / turnout 296,245 71.08 +1.15 Abstentions 120,559 28.92 –1.15 Registered voters 416,804 Sources

2011 + Summary of the 22 May 2011 Corts Valencianes election results in Castellón Parties and alliances Popular vote Seats Votes % ±pp Total +/− People's Party (PP) 136,353 48.06 –1.25 13 +1 Socialist Party of the Valencian Country (PSPV–PSOE) 87,983 31.01 –6.99 9 –1 Bloc–Initiative–Greens: Commitment Coalition (Compromís)1 19,115 6.74 n/a 1 ±0 United Left of the Valencian Country (EUPV)1 14,679 5.17 n/a 1 ±0 Union, Progress and Democracy (UPyD) 5,423 1.91 New 0 ±0 Greens and Eco-pacifists (VyE) 2,988 1.05 New 0 ±0 Spain 2000 (E–2000) 2,908 1.02 +0.43 0 ±0 Republican Left of the Valencian Country (ERPV) 2,372 0.84 +0.14 0 ±0 Anti-Bullfighting Party Against Mistreatment of Animals (PACMA) 931 0.33 New 0 ±0 Valencian Coalition (CVa) 827 0.29 –0.28 0 ±0 National Democracy (DN) 555 0.20 New 0 ±0 Communist Party of the Peoples of Spain (PCPE) 509 0.18 +0.04 0 ±0 Liberal Democratic Centre (CDL) 505 0.18 New 0 ±0 Family and Life Party (PFyV) 430 0.15 New 0 ±0 United for Valencia (UxV) 189 0.07 –0.04 0 ±0 Blank ballots 7,972 2.81 +1.19 Total 283,739 24 ±0 Valid votes 283,739 97.94 –1.24 Invalid votes 5,963 2.06 +1.24 Votes cast / turnout 289,702 69.93 –0.61 Abstentions 124,590 30.07 +0.61 Registered voters 414,292 Sources

2007 + Summary of the 27 May 2007 Corts Valencianes election results in Castellón Parties and alliances Popular vote Seats Votes % ±pp Total +/− People's Party (PP) 140,982 49.31 +1.16 12 –1 Socialist Party of the Valencian Country (PSPV–PSOE) 108,653 38.00 +1.51 10 +1 Commitment for the Valencian Country (Compromís PV)1 22,205 7.77 –2.47 2 +1 Republican Left of the Valencian Country (ERPV) 1,944 0.68 +0.21 0 ±0 Spain 2000 (E–2000) 1,693 0.59 +0.46 0 ±0 Valencian Coalition (CVa) 1,638 0.57 New 0 ±0 Valencian Union–The Eco-pacifist Greens (UV–LVEP) 1,570 0.55 –1.47 0 ±0 Social Democratic Party (PSD) 1,314 0.46 New 0 ±0 Communist Party of the Peoples of Spain (PCPE) 386 0.14 –0.01 0 ±0 Spanish Falange of the JONS (FE-JONS) 320 0.11 New 0 ±0 United for Valencia (UxV) 315 0.11 New 0 ±0 Authentic Phalanx (FA) 254 0.09 –0.01 0 ±0 Blank ballots 4,619 1.62 –0.08 Total 285,893 24 +1 Valid votes 285,893 99.18 +0.02 Invalid votes 2,376 0.82 –0.02 Votes cast / turnout 288,269 70.54 –2.22 Abstentions 120,401 29.46 +2.22 Registered voters 408,670 Sources

2003 + Summary of the 25 May 2003 Corts Valencianes election results in Castellón Parties and alliances Popular vote Seats Votes % ±pp Total +/− People's Party (PP) 139,118 48.15 –1.15 13 +1 Socialist Party of the Valencian Country (PSPV–PSOE) 105,447 36.49 +1.92 9 ±0 Valencian Nationalist Bloc–Green Left (Bloc–EV) 16,864 5.84 +0.54 0 ±0 United Left–The Greens–Valencian Left: The Agreement (L'Entesa) 12,707 4.40 +0.23 1 ±0 Union–Valencian Union (UV) 5,843 2.02 –2.33 0 ±0 Republican Left of the Valencian Country (ERPV) 1,348 0.47 New 0 ±0 Federal Republican Party (PRF) 586 0.20 +0.10 0 ±0 Communist Party of the Peoples of Spain (PCPE) 442 0.15 New 0 ±0 Spain 2000 (E–2000) 384 0.13 New 0 ±0 Regional Party of the Valencian Community (PRCV) 360 0.12 New 0 ±0 Humanist Party (PH) 336 0.12 ±0.00 0 ±0 Democratic and Social Centre (CDS) 301 0.10 New 0 ±0 Authentic Phalanx (FA) 288 0.10 New 0 ±0 Blank ballots 4,920 1.70 –0.16 Total 288,944 23 +1 Valid votes 288,944 99.16 +0.02 Invalid votes 2,450 0.84 –0.02 Votes cast / turnout 291,394 72.76 +2.33 Abstentions 109,077 27.24 –2.33 Registered voters 400,471 Sources

1999 + Summary of the 13 June 1999 Corts Valencianes election results in Castellón Parties and alliances Popular vote Seats Votes % ±pp Total +/− People's Party (PP) 132,300 49.30 +3.69 12 +1 Spanish Socialist Workers' Party–Progressives (PSOE–p) 92,771 34.57 –1.02 9 +1 Valencian Nationalist Bloc–The Greens (BNV–EV)1 14,220 5.30 +1.10 0 ±0 Valencian Union (UV) 11,681 4.35 –0.01 0 –1 United Left of the Valencian Country (EUPV) 11,186 4.17 –4.03 1 –1 Spanish Phalanx of the CNSO (FE–JONS) 331 0.12 New 0 ±0 Humanist Party (PH) 315 0.12 New 0 ±0 Valencian Nationalist Left (ENV) 294 0.11 +0.01 0 ±0 Federal Republican Left–Federal Republican Party (IRF–PRF) 267 0.10 New 0 ±0 Blank ballots 5,002 1.86 +0.83 Total 268,367 22 ±0 Valid votes 268,367 99.14 –0.26 Invalid votes 2,315 0.86 +0.26 Votes cast / turnout 270,682 70.43 –5.86 Abstentions 113,653 29.57 +5.86 Registered voters 384,335 Sources

1995 + Summary of the 28 May 1995 Corts Valencianes election results in Castellón Parties and alliances Popular vote Seats Votes % ±pp Total +/− People's Party (PP) 127,777 45.61 +10.33 11 +2 Spanish Socialist Workers' Party (PSOE) 99,700 35.59 –5.78 8 –3 United Left–The Greens (EU–EV)1 22,982 8.20 +1.80 2 +1 Valencian Union–Independents–Centrists (UV–FICVA–CCV) 12,218 4.36 –0.84 1 ±0 Valencian People's Union–Nationalist Bloc (UPV–BN) 11,754 4.20 –0.72 0 ±0 Democratic and Social Centre (CDS) 1,075 0.38 –4.32 0 ±0 Platform of Independents of Spain (PIE) 574 0.20 New 0 ±0 Communist Party of the Peoples of Spain (PCPE) 413 0.15 +0.02 0 ±0 Autonomist Republican Party (PRA) 375 0.13 New 0 ±0 Valencian Nationalist Left (ENV)2 277 0.10 New 0 ±0 United Alicante (AU) 118 0.04 New 0 ±0 Blank ballots 2,887 1.03 –0.04 Total 280,150 22 ±0 Valid votes 280,150 99.40 +0.11 Invalid votes 1,689 0.60 –0.11 Votes cast / turnout 281,839 76.29 +3.99 Abstentions 87,595 23.71 –3.99 Registered voters 369,434 Sources

1991