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

General elections 2023 + Summary of the 23 July 2023 Congress of Deputies election results in Zamora Parties and alliances Popular vote Seats Votes % ±pp Total +/− People's Party (PP) 46,196 44.67 +11.10 2 +1 Spanish Socialist Workers' Party (PSOE) 33,601 32.49 –0.33 1 ±0 Vox (Vox) 13,652 13.20 –3.87 0 –1 Unite (Sumar)1 5,839 5.65 –1.37 0 ±0 Zamora Yes (ZSí) 1,843 1.78 New 0 ±0 Leonese People's Union (UPL) 526 0.51 +0.14 0 ±0 Animalist Party with the Environment (PACMA)1 313 0.30 –0.13 0 ±0 Regionalist Party of the Leonese Country (PREPAL) 166 0.16 –0.12 0 ±0 Workers' Front (FO) 121 0.12 New 0 ±0 Communist Party of the Workers of Spain (PCTE) 100 0.10 –0.02 0 ±0 For a Fairer World (PUM+J) 81 0.08 –0.06 0 ±0 Zero Cuts (Recortes Cero) 50 0.05 –0.08 0 ±0 Blank ballots 922 0.89 –0.32 Total 103,410 3 ±0 Valid votes 103,410 98.80 +0.32 Invalid votes 1,261 1.20 –0.32 Votes cast / turnout 104,671 64.22 +4.00 Abstentions 58,327 35.78 –4.00 Registered voters 162,998 Sources

November 2019 + Summary of the 10 November 2019 Congress of Deputies election results in Zamora Parties and alliances Popular vote Seats Votes % ±pp Total +/− People's Party (PP) 33,495 33.57 +3.97 1 ±0 Spanish Socialist Workers' Party (PSOE) 32,747 32.82 +1.52 1 ±0 Vox (Vox) 17,036 17.07 +5.42 1 +1 United We Can (Podemos–IU) 7,001 7.02 –1.28 0 ±0 Citizens–Party of the Citizenry (Cs) 6,835 6.85 –10.08 0 –1 Animalist Party Against Mistreatment of Animals (PACMA) 432 0.43 –0.10 0 ±0 Leonese People's Union (UPL) 369 0.37 New 0 ±0 Regionalist Party of the Leonese Country (PREPAL) 278 0.28 –0.09 0 ±0 For a Fairer World (PUM+J) 143 0.14 +0.01 0 ±0 Zero Cuts–Green Group–PCAS–TC (Recortes Cero–GV–PCAS–TC) 129 0.13 ±0.00 0 ±0 Communist Party of the Workers of Spain (PCTE) 120 0.12 +0.02 0 ±0 Blank ballots 1,206 1.21 +0.24 Total 99,791 3 ±0 Valid votes 99,791 98.48 –0.04 Invalid votes 1,543 1.52 +0.04 Votes cast / turnout 101,334 60.22 –6.15 Abstentions 66,934 39.78 +6.15 Registered voters 168,268 Sources

April 2019 + Summary of the 28 April 2019 Congress of Deputies election results in Zamora Parties and alliances Popular vote Seats Votes % ±pp Total +/− Spanish Socialist Workers' Party (PSOE) 34,628 31.30 +7.38 1 ±0 People's Party (PP) 32,750 29.60 –18.66 1 –1 Citizens–Party of the Citizenry (Cs) 18,729 16.93 +5.52 1 +1 Vox (Vox) 12,887 11.65 New 0 ±0 United We Can (Podemos–IU–Equo) 9,187 8.30 –5.85 0 ±0 Animalist Party Against Mistreatment of Animals (PACMA) 585 0.53 +0.04 0 ±0 Regionalist Party of the Leonese Country (PREPAL) 405 0.37 +0.22 0 ±0 Zero Cuts–Green Group–PCAS–TC (Recortes Cero–GV–PCAS–TC) 147 0.13 –0.03 0 ±0 For a Fairer World (PUM+J) 141 0.13 New 0 ±0 Communist Party of the Workers of Spain (PCTE) 116 0.10 New 0 ±0 Blank ballots 1,070 0.97 +0.04 Total 110,645 3 ±0 Valid votes 110,645 98.52 –0.17 Invalid votes 1,660 1.48 +0.17 Votes cast / turnout 112,305 66.37 +2.71 Abstentions 56,895 33.63 –2.71 Registered voters 169,200 Sources

2016 + Summary of the 26 June 2016 Congress of Deputies election results in Zamora Parties and alliances Popular vote Seats Votes % ±pp Total +/− People's Party (PP) 52,555 48.26 +5.70 2 ±0 Spanish Socialist Workers' Party (PSOE) 26,045 23.92 +0.96 1 ±0 United We Can (Podemos–IU–Equo–CLI–AS)1 15,403 14.15 –4.74 0 ±0 Citizens–Party of the Citizenry (C's) 12,423 11.41 –1.50 0 ±0 Animalist Party Against Mistreatment of Animals (PACMA) 537 0.49 +0.05 0 ±0 Union, Progress and Democracy (UPyD) 256 0.24 –0.42 0 ±0 Leonese People's Union (UPL) 201 0.18 New 0 ±0 Zero Cuts–Green Group (Recortes Cero–GV) 174 0.16 –0.01 0 ±0 Regionalist Party of the Leonese Country (PREPAL) 158 0.15 –0.07 0 ±0 Communist Party of the Peoples of Spain (PCPE) 131 0.12 +0.01 0 ±0 Blank ballots 1,010 0.93 –0.15 Total 108,893 3 ±0 Valid votes 108,893 98.69 +0.03 Invalid votes 1,446 1.31 –0.03 Votes cast / turnout 110,339 63.66 –2.09 Abstentions 62,981 36.34 +2.09 Registered voters 173,320 Sources

2015 + Summary of the 20 December 2015 Congress of Deputies election results in Zamora Parties and alliances Popular vote Seats Votes % ±pp Total +/− People's Party (PP) 48,160 42.56 –15.20 2 ±0 Spanish Socialist Workers' Party (PSOE) 25,985 22.96 –6.72 1 ±0 We Can (Podemos) 15,865 14.02 New 0 ±0 Citizens–Party of the Citizenry (C's) 14,608 12.91 New 0 ±0 United Left–Popular Unity in Common (IU–UPeC) 5,514 4.87 –0.35 0 ±0 Union, Progress and Democracy (UPyD) 747 0.66 –3.27 0 ±0 Animalist Party Against Mistreatment of Animals (PACMA) 502 0.44 +0.11 0 ±0 Regionalist Party of the Leonese Country (PREPAL) 246 0.22 –0.14 0 ±0 Zero Cuts–Green Group (Recortes Cero–GV) 187 0.17 New 0 ±0 Communist Party of the Peoples of Spain (PCPE) 128 0.11 New 0 ±0 Blank ballots 1,227 1.08 –0.66 Total 113,169 3 ±0 Valid votes 113,169 98.66 +0.03 Invalid votes 1,534 1.34 –0.03 Votes cast / turnout 114,703 65.75 –1.39 Abstentions 59,742 34.25 +1.39 Registered voters 174,445 Sources

2011 + Summary of the 20 November 2011 Congress of Deputies election results in Zamora Parties and alliances Popular vote Seats Votes % ±pp Total +/− People's Party (PP) 68,228 57.76 +6.34 2 ±0 Spanish Socialist Workers' Party (PSOE) 35,059 29.68 –13.10 1 ±0 United Left of Castile and León: Plural Left (IUCyL) 6,161 5.22 +2.96 0 ±0 Union, Progress and Democracy (UPyD) 4,641 3.93 +3.00 0 ±0 Blank Seats (EB) 649 0.55 New 0 ±0 Regionalist Party of the Leonese Country (PREPAL) 429 0.36 –0.01 0 ±0 Animalist Party Against Mistreatment of Animals (PACMA) 395 0.33 +0.17 0 ±0 For a Fairer World (PUM+J) 298 0.25 +0.14 0 ±0 Anti-capitalists (Anticapitalistas) 205 0.17 New 0 ±0 Blank ballots 2,057 1.74 +0.55 Total 118,122 3 ±0 Valid votes 118,122 98.63 –0.23 Invalid votes 1,637 1.37 +0.23 Votes cast / turnout 119,759 67.14 –7.74 Abstentions 58,606 32.86 +7.74 Registered voters 178,365 Sources

2008 + Summary of the 9 March 2008 Congress of Deputies election results in Zamora Parties and alliances Popular vote Seats Votes % ±pp Total +/− People's Party (PP) 68,276 51.42 –1.93 2 ±0 Spanish Socialist Workers' Party (PSOE) 56,793 42.78 +2.85 1 ±0 United Left–Alternative (IU) 3,002 2.26 –0.25 0 ±0 Union, Progress and Democracy (UPyD) 1,234 0.93 New 0 ±0 Regionalist Party of the Leonese Country (PREPAL) 491 0.37 –0.06 0 ±0 The Greens of Europe (LVdE) 381 0.29 New 0 ±0 Anti-Bullfighting Party Against Mistreatment of Animals (PACMA) 211 0.16 New 0 ±0 For a Fairer World (PUM+J) 152 0.11 New 0 ±0 Spanish Phalanx of the CNSO (FE de las JONS) 92 0.07 +0.02 0 ±0 Communist Party of the Castilian People (PCPC–PCPE) 90 0.07 +0.03 0 ±0 Citizens–Party of the Citizenry (C's) 89 0.07 New 0 ±0 National Democracy (DN) 80 0.06 +0.02 0 ±0 Liberal Centrist Union (UCL) 80 0.06 –0.04 0 ±0 Humanist Party (PH) 76 0.06 New 0 ±0 Commoners' Land (TC) 68 0.05 –0.02 0 ±0 Centrist Party (PCTR) 40 0.03 New 0 ±0 Spanish Alternative (AES) 36 0.03 New 0 ±0 Blank ballots 1,580 1.19 –0.69 Total 132,771 3 ±0 Valid votes 132,771 98.86 –0.30 Invalid votes 1,526 1.14 +0.30 Votes cast / turnout 134,297 74.88 +0.44 Abstentions 45,058 25.12 –0.44 Registered voters 179,355 Sources

2004