36 years, 82 days António de Oliveira Salazar from 1932 to 1968 11 years, 26 days Fontes Pereira de Melo from 1871 to 1877, 1878 to 1879 and 1881 to 1886 9 years, 356 days Aníbal Cavaco Silva from 1985 to 1995 155 days Maria de Lourdes Pintasilgo from 1979 to 1980; the first and still only woman to hold the office of Prime Minister in Portuguese history. The shortest time in office was that of Francisco José Fernandes Costa , who was appointed Prime Minister on 15 January 1920 and resigned after having not taken office during the same day, due to protests. This is a list of Portuguese prime ministers by time in office . The first "modern" Prime Minister was the Duke of Palmela , using the title of President of the Council of Ministers , who took office during the constitutional monarchy in 1834.
Of the 90 prime ministers, 8 have served more than eight years, while 55 have served less than one year.
António Oliveira Salazar is the longest serving prime minister in Portuguese history, with more than 36 years in office, although he ruled as a dictator . In more democratic systems, during the constitutional monarchy, Fontes Pereira de Melo served as prime minister for 11 years, although in three separate terms; while in the Third Republic , Aníbal Cavaco Silva held office for 10 years. During the turbulent First Portuguese Republic , António José de Almeida held office for just over one year, while Francisco Fernandes Costa didn't even serve as prime minister because he refused to take the oath of office.
Rank by time in office Rank Prime Minister Time in office Cabinets Party 1 António de Oliveira Salazar 36 years, 82 days 3 National Union 2 Fontes Pereira de Melo 11 years, 26 days 3 Regenerator 3 Aníbal Cavaco Silva 9 years, 356 days 3 Social Democratic 4 José Luciano de Castro 8 years, 288 days 3 Progressive 5 Duke of Saldanha 8 years, 203 days 4 Regenerator 6 Ernesto Hintze Ribeiro 8 years, 131 days 3 Regenerator 7 António Costa 8 years, 128 days 3 Socialist 8 Duke of Loulé 8 years, 123 days 3 Historic 9 António Guterres 6 years, 160 days 2 Socialist 10 José Sócrates 6 years, 101 days 2 Socialist 11 Duke of Terceira 5 years, 290 days 4 Regenerator 12 Marcello Caetano 5 years, 210 days 1 National Union 13 Mário Soares 4 years, 187 days 3 Socialist 14 Pedro Passos Coelho 4 years, 158 days 2 Social Democratic 15 Marquess of Sá da Bandeira 3 years, 310 days 5 Reformist 16 Joaquim António de Aguiar 3 years, 64 days 3 Regenerator 17 Domingos Oliveira 2 years, 166 days 1 National Union 18 Francisco Pinto Balsemão 2 years, 151 days 2 Social Democratic 19 António Maria da Silva 2 years, 132 days 4 Democratic 20 Duke of Ávila 2 years, 119 days 3 Reformist 21 José Manuel Durão Barroso 2 years, 102 days 1 Social Democratic 22 Afonso Costa 1 year, 329 days 3 Democratic 23 Costa Cabral, Marquess of Tomar 1 year, 312 days 2 Chartist 24 Anselmo José Braamcamp 1 year, 297 days 1 Progressive 25 António Óscar Carmona 1 year, 284 days 1 26 João Franco 1 year, 261 days 1 Liberal Regenerator 27 Count of Bonfim 1 year, 195 days 1 Septemberist 28 Luís Montenegro 2 Social Democratic 29 João Crisóstomo 1 year, 95 days 1 30 José Vicente de Freitas 1 year, 81 days 1 31 Vasco Gonçalves 1 year, 63 days 1 32 António José de Almeida 1 year, 40 days 1 Evolutionist 33 José Dias Ferreira 1 year, 35 days 1 34 Bernardino Machado 1 year, 23 days 2 Democratic 35 Sidónio Pais 1 year, 9 days 1 National Republican 36 Duke of Palmela 363 days 3 Chartist 37 Francisco Sá Carneiro 336 days 1 Social Democratic 38 Francisco Ferreira do Amaral 326 days 1 39 Teófilo Braga 323 days 1 Republican 40 Domingos Pereira 278 days 3 Democratic José Pinheiro de Azevedo 278 days 1 41 António de Serpa Pimentel 270 days 1 Regenerator 42 Carlos Mota Pinto 252 days 1 Social Democratic 43 Pedro Santana Lopes 238 days 1 Social Democratic 44 António Rodrigues Sampaio 236 days 1 Regenerator 45 Baron of Ribeira de Sabrosa 222 days 1 Septemberist Venceslau de Lima 222 days 1 46 Augusto de Vasconcelos 216 days 1 Republican 47 Álvaro de Castro 212 days 1 Nationalist Republican 48 Duarte Leite 207 days 1 Republican 49 Alfredo de Sá Cardoso 205 days 1 Democratic 50 Artur Ivens Ferraz 197 days 1 51 José de Castro 196 days 1 Democratic 52 Francisco da Veiga Beirão 186 days 1 Regenerator 53 António Granjo 174 days 2 Republican Liberal 54 Maria de Lourdes Pintasilgo 155 days 1 55 José Jorge Loureiro 154 days 1 56 Alfredo Rodrigues Gaspar 138 days 1 Democratic 57 Vitorino Guimarães 136 days 1 Democratic 58 Artur de Campos Henriques 106 days 1 Joaquim Pimenta de Castro 106 days 1 59 António Teixeira de Sousa 101 days 1 Regenerator 60 Tomé de Barros Queirós 99 days 1 Republican Liberal 61 Liberato Pinto 92 days 1 Democratic 62 António Maria Baptista 90 days 1 Democratic 63 Alfredo Nobre da Costa 86 days 1 64 José Domingues dos Santos 85 days 1 Democratic Leftwing Republican 65 João Chagas 72 days 1 Republican 66 Adelino da Palma Carlos 63 days 1 67 António Dias de Oliveira 62 days 1 Septemberist José Relvas 62 days 1 68 Count of Lumiares 55 days 1 Septemberist 69 Francisco Cunha Leal 53 days 1 Democratic 70 Vítor Hugo de Azevedo Coutinho 47 days 1 Democratic 71 Carlos Maia Pinto 41 days 1 72 Diogo Freitas do Amaral 36 days 1 Democratic and Social Centre 73 João Tamagnini Barbosa 35 days 1 National Republican 74 Sebastião Sousa Teles 33 days 1 António Ginestal Machado 33 days 1 Nationalist Republican 75 Vasco de Almeida e Costa 30 days 1 76 Count of Linhares 23 days 1 77 National Salvation Junta 21 days 1 78 José Ramos Preto 20 days 1 Democratic José Mendes Cabeçadas 20 days 1 Manuel Gomes da Costa 20 days 1 79 Manuel Maria Coelho 17 days 1 80 João do Canto e Castro 9 days 1 National Republican 81 Marquess of Valença 1 day 1 Constitutional Junta 1 day 1 82 Francisco Fernandes Costa less than a day – Republican Liberal
By party Rank Party Time in office Prime ministers 1 National Union 44 years, 93 days 3 2 Regenerator 38 years, 176 days 9 3 Socialist 25 years, 211 days 4 4 Social Democratic 8 5 Independent 11 years, 307 days 25 6 Progressist 10 years, 220 days 2 7 Democratic 8 years, 279 days 13 8 Historic 8 years, 123 days 1 9 Reformist 6 years, 64 days 2 10 Chartist 2 years, 310 days 2 11 Septemberist 2 years, 169 days 4 12 Republican 2 years, 88 days 4 13 Liberal Regenerator 1 year, 261 days 1 14 Evolutionist 1 year, 40 days 1 15 National Republican 1 year, 53 days 3 16 Republican Liberal 273 days 3 17 Nationalist Republican 245 days 2 18 Democratic Leftwing Republican 85 days 1 19 Democratic and Social Centre 36 days 1 20 23 days 1
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