Canada: In parliamentary elections in Quebec, the Coalition Avenir Québec wins 37.4% of the vote (74 of 125 seats), the Quebec Liberal Party 24.8% (31), the Parti Québécois 17.1% (10), and Québec Solidaire 16.1% (10). Turnout is 66.4%. On October 18 François Legault is sworn in as premier.
Dominica: Parliament reelects Charles Savarin as president.
France: Interior Minister Gérard Collomb tenders his resignation to President Emmanuel Macron, but he rejects it. On October 2 Collomb reiterates his decision to resign and early on October 3 Macron accepts it, asking Prime Minister Édouard Philippe to take over the portfolio until a successor is named. In a reshuffle on October 16, Christophe Castaner is named interior minister.
Iraq: Parliament fails, due to a lack of quorum, to elect a president. A new session is called for October 2, when, in a first round (with a two-thirds majority required), Barham Salih wins 165 votes and Fuad Hussein 90; in the second round (simple majority sufficient) Salih is elected 219-22, after Hussein's withdrawal was announced (but not accepted by the parliament speaker). Salih is then sworn in and tasks Adel Abdul Mahdi with forming a government.
Mexico: Cuauhtémoc Blanco takes office as governor of Morelos and Mauricio Vila Dosal as governor of Yucatán.
Russia: Acting incumbent Aleksandr Tsybulsky, who was nominated as candidate for the post of governor of Nenets autonomous okrug together with Andrey Smychenkov and Andrey Ruzhnikov, is elected by the local assembly (12 of 17 votes) and sworn in.
San Marino: Mirco Tomassoni (Democratic Socialist Left) and Luca Santolini (Civic10) take office as captains-regent.
Vietnam: Former chairman of the Council of Ministers (1988-91) and general secretary of the Communist Party (1991-97) Do Muoi dies.
Japan: In a cabinet reshuffle, Takeshi Iwaya is appointed defense minister.
Russia: President Vladimir Putin accepts the resignation of the head of the administration of Lipetsk oblast, Oleg Korolev, and appoints Igor Artamonov as acting head of the administration. Putin also accepts the resignation of the governor of Kurgan oblast, Aleksey Kokorin, and appoints Vadim Shumkov as acting governor. Andrey Filyagin withdraws his candidature from the runoff in Khakassia, which is now scheduled for October 21 between Valentin Konovalov and fourth-placed Aleksandr Myakhar (who also withdraws on October 15, the vote then being postponed to November 11 with Konovalov as sole candidate). On October 3 Putin appoints Mikhail Razvozhayev as acting head of the republic - chairman of the government of Khakassia. Also on October 3 Putin accepts the resignation of the governor of Saint Petersburg, Georgy Poltavchenko, and appoints Aleksandr Beglov as acting governor, relieving him from his duties as plenipotentiary of the president in Severo-Zapadny federal district.
Sweden: Riksdag speaker Andreas Norlén announces that he has asked Moderate Party leader Ulf Kristersson to form a government. Kristersson abandons his attempt on October 14. On October 15 Norlén asks Prime Minister Stefan Löfven to form a new government.
United States: In mayoral elections in Juneau, Beth Weldon wins 48.9% of the vote and Saralyn Tabachnick 39.1%. Weldon takes office October 15.
Pakistan: Amanullah Khan Yasinzai is appointed as governor of Balochistan (sworn in October 4).
Japan: Denny Tamaki takes office as governor of Okinawa.
Gabon: In the first round of parliamentary elections (turnout 58.6%), the Gabonese Democratic Party wins 74 of 83 decided seats. A second round for a further 60 seats (for a total of 143) will be held on October 27.
Latvia: In parliamentary elections, Harmony wins 19.8% of the vote and 23 of 100 seats, Who Owns the State 14.3% (16), the New Conservative Party 13.6% (16), For Development/For! 12.0% (13), the National Alliance 11.0% (13), the Union of Greens and Farmers 9.9% (11), and New Unity 6.7% (8). Turnout is 54.6%.
Bosnia and Herzegovina: In the election to the tripartite presidency, Milorad Dodik wins the Serb seat with 53.9% of the vote (against Mladen Ivanic with 43.0%), Sefik Dzaferovic the Bosniak seat with 36.5% (against Denis Becirovic with 33.6%), and Zeljko Komsic the Croat seat with 54.1% (against Dragan Covic with 34.6%). Zeljka Cvijanovic is elected president of the Republika Srpska with 47.5% of the vote, against Vukota Govedarica with 43.0%.
Brazil: In the first round of presidential elections, Jair Bolsonaro of the Social Liberal Party (PSL) wins 46.0% of the vote, Fernando Haddad of the Workers' Party (PT) 29.3%, Ciro Gomes of the Democratic Labour Party (PDT) 12.5%, and Geraldo Alckmin of the Brazilian Social Democratic Party (PSDB) 4.8%. The runoff is to be held October 28. In the parliamentary elections, the PT wins 56 of 513 seats in the Chamber of Deputies, the PSL 52, the Progressive Party (PP) 37, the Brazilian Democratic Movement (MDB) 34, the Social Democratic Party (PSD) 34, the Party of the Republic (PR) 33, the Brazilian Socialist Party (PSB) 32, the Brazilian Republican Party (PRB) 30, the PSDB 29, the Democrats (DEM) 29, the PDT 28, Solidarity (SD) 13, Podemos (PODE) 11, the Socialism and Liberty Party (PSOL) 10, and the Brazilian Labour Party (PTB) 10. Results of gubernatorial elections (first round):
Cameroon: In presidential elections, incumbent Paul Biya (Cameroon People's Democratic Movement) wins 71.3% of the vote and Maurice Kamto (Cameroon Renaissance Movement) 14.2%. Turnout is 53.5%.
- Acre: Gladson de Lima Cameli (PP) 53.7%, Marcus Alexandre Médici Aguiar Viana da Silva (PT) 34.5%, Ulysses Freitas Pereira de Araújo (PSL) 10.8%.
- Alagoas: Gov. José Renan Vasconcelos Calheiros Filho (MDB) 77.3%, Josan Leite Pereira Barros (PSL) 11.1%.
- Amapá: Gov. Antônio Waldez Góes da Silva (PDT) 33.6%, João Alberto Rodrigues Capiberibe (PSB) 30.1%, David Samuel Alcolumbre Tobelem (DEM) 23.7%, Antonio Cirilo Fernandes Borges (PSL) 11.4%.
- Amazonas: Wilson Miranda Lima (Social Christian Party) 33.7%, Gov. Amazonino Armando Mendes (PDT) 32.7%, David Antonio Abisai Pereira de Almeida (PSB) 23.6%.
- Bahia: Gov. Rui Costa dos Santos (PT) 75.5%, José Ronaldo de Carvalho (DEM) 22.3%.
- Ceará: Gov. Camilo Sobreira de Santana (PT) 80.0%, Guilherme Cals Theophilo Gaspar de Oliveira (PSDB) 11.3%.
- Distrito Federal: Ibaneis Rocha Barros Júnior (MDB) 42.0%, Gov. Rodrigo Sobral Rollemberg (PSB) 13.9%, Rogério Schumann Rosso (PSD) 11.2%.
- Espírito Santo: José Renato Casagrande (PSB) 55.5%, Carlos Humberto Mannato (PSL) 27.2%.
- Goiás: Ronaldo Ramos Caiado (DEM) 59.7%, Daniel Elias Carvalho Vilela (MDB) 16.1%, Gov. José Eliton de Figueiredo Júnior (PSDB) 13.7%.
- Maranhão: Gov. Flávio Dino de Castro e Costa (PCdoB) 59.3%, Roseana Macieira Sarney Murad (MDB) 30.1%.
- Mato Grosso: Mauro Mendes Ferreira (DEM) 58.7%, Wellington Antonio Fagundes (PR) 19.6%, Gov. José Pedro Gonçalves Taques (PSDB) 19.0%.
- Mato Grosso do Sul: Gov. Reinaldo Azambuja Silva (PSDB) 44.6%, Odilon de Oliveira (PDT) 31.6%, Oswaldo Mochi Júnior (MDB) 11.6%, Humberto Carlos Ramos Amaducci (PT) 10.3%.
- Minas Gerais: Romeu Zema Neto (New Party) 42.7%, Antonio Augusto Junho Anastasia (PSDB) 29.1%, Gov. Fernando Damata Pimentel (PT) 23.1%.
- Pará: Helder Zahluth Barbalho (MDB) 47.7%, Marcio Desidério Teixeira Miranda (DEM) 30.2%, Paulo Roberto Galvão da Rocha (PT) 17.1%.
- Paraíba: João Azevedo Lins Filho (PSB) 58.2%, Lucélio Cartaxo Pires de Sá (Green Party) 23.4%, José Targino Maranhão (MDB) 17.4%.
- Paraná: Carlos Roberto Massa Júnior (PSD) 56.3%, Gov. Cida Borghetti (PP) 14.6%, João José de Arruda Júnior (MDB) 12.4%.
- Pernambuco: Gov. Paulo Henrique Saraiva Câmara (PSB) 50.7%, Armando de Queiroz Monteiro Neto (PTB) 36.0%.
- Piauí: Gov. José Wellington Barroso de Araújo Dias (PT) 55.6%, José Pessoa Leal (SD) 20.5%, Luciano Nunes Santos Filho (PSDB) 17.3%.
- Rio de Janeiro: Wilson José Witzel (Social Christian Party) 40.8%, Eduardo da Costa Paes (DEM) 19.3%, Tarcísio Motta de Carvalho (PSOL) 10.6%.
- Rio Grande do Norte: Maria de Fatima Bezerra (PT) 46.2%, Carlos Eduardo Nunes Alves (PDT) 32.5%, Gov. Robinson Mesquita de Faria (PSD) 11.9%.
- Rio Grande do Sul: Eduardo Figueiredo Cavalheiro Leite (PSDB) 35.9%, Gov. José Ivo Sartori (MDB) 31.1%, Miguel Soldatelli Rossetto (PT) 17.8%, Jairo Jorge da Silva (PDT) 11.1%.
- Rondônia: Expedito Gonçalves Ferreira Júnior (PSDB) 30.1%, Marcos José Rocha dos Santos (PSL) 22.9%, Mauro de Carvalho (MDB) 21.6%, Vinicius Valentin Raduan Miguel (Sustainability Network) 13.8%.
- Roraima: Antônio Olivério Garcia de Almeida (PSL) 42.3%, José de Anchieta Júnior (PSDB) 38.8%, Gov. Maria Suely Silva Campos (PP) 11.1%.
- Santa Catarina: Gelson Luiz Merísio (PSD) 31.1%, Carlos Moisés da Silva (PSL) 29.7%, Mauro Mariani (MDB) 23.2%, Décio Nery de Lima (PT) 12.8%.
- São Paulo: João Agripino da Costa Doria Júnior (PSDB) 31.8%, Gov. Márcio França (PSB) 21.5%, Paulo Antonio Skaf (MDB) 21.1%, Luiz Marinho (PT) 12.7%.
- Sergipe: Gov. Belivaldo Chagas Silva (PSD) 40.8%, Antônio Carlos Valadares Filho (PSB) 21.5%, Eduardo Alves do Amorim (PSDB) 20.5%.
- Tocantins: Gov. Mauro Carlesse (Humanist Party of Solidarity) 57.4%, Carlos Enrique Franco Amastha (PSB) 31.2%.
Libya: In a reshuffle of Fayez al-Sarraj's government, Fathi Bashagha is appointed interior minister and Faraj Bumatari finance minister.
São Tomé and Príncipe: In parliamentary elections, the Independent Democratic Action wins 43.6% of the vote (25 of 55 seats), the Movement for the Liberation of São Tomé and Príncipe/Social Democratic Party (MLSTP/PSD) 42.1% (23), and the coalition of Democratic Convergence Party, Union for Democracy and Development, and Democratic Movement Force of Change 9.9% (5). Turnout is about 81%. In the elections in the autonomous region of Príncipe, the Union for Change and Progress in Príncipe wins 62.6% of the vote (5 of 7 seats), the Green Movement for the Development of Príncipe 27.5% (2), and the MLSTP/PSD 9.9% (0).
Russia: Vladimir Sipyagin takes office as governor of Vladimir oblast.
South Africa: Finance Minister Nhlanhla Nene resigns. Tito Mboweni is appointed and sworn in as finance minister.
United States: UN ambassador Nikki Haley resigns, effective at the end of the year.
France: Former president of the Regional Council of Centre (1979-83) Jean Delaneau dies.
Russia: Stanislav Voskresensky takes office as governor of Ivanovo oblast.
Russia: President Vladimir Putin accepts the resignation of the head of the republic of Bashkortostan, Rustem Khamitov, and appoints Rady Khabirov as acting head of the republic. Putin also accepts the resignation of the governor of Kursk oblast, Aleksandr Mikhailov, and appoints Roman Starovoyt as acting governor.
Philippines: Teodoro Locsin, Jr., is named as foreign secretary (sworn in October 17).
Portugal: Defense Minister José Alberto Azeredo Lopes resigns. On October 14 João Gomes Cravinho is named defense minister (taking office October 15).
South Africa: Former foreign minister (1977-94) Roelof Botha dies.
Czech Republic: Elections for 27 of 81 seats in the Senate are held in two rounds October 5-6 and 12-13. Only 2 seats are decided in the first round (turnout 42.3%). The second round (turnout 16.5%) leads to the following distribution of seats: Civic Democratic Party 10, Mayors and Independents 5 (1 from the first round), Christian and Democratic Union-Czechoslovak People's Party 2 (1 from the first round), Action of Dissatisfied Citizens 2011 1, Czech Social Democratic Party 1, Pirate Party 1, Tradition Responsibility Prosperity 09 1, smaller parties and independents 6.
Germany: In state elections in Bayern, the Christian Social Union wins 37.2% of the vote (85 of 205 seats), the Greens 17.5% (38), the Free Voters 11.6% (27), the Alternative for Germany 10.2% (22), the Social Democratic Party 9.7% (22), the Free Democratic Party 5.1% (11), and the Left 3.2% (0). Turnout is 72.4%.
Luxembourg: In parliamentary elections, the Christian Social People's Party wins 28.3% of the vote (21 of 60 seats), the Socialist Workers' Party 17.6% (10), the Democratic Party 16.9% (12), the Greens 15.1% (9), the Alternative Democratic Reform Party 8.3% (4), the Pirate Party 6.4% (2), and the Left 5.5% (2). Turnout is 89.7%. On October 16 Grand Duke Henri asks Prime Minister Xavier Bettel to form a new government.
Yemen: President Abdu Rabu Mansour Hadi dismisses Ahmad Obaid Bin Daghr and appoints Maeen Abdul Malik as prime minister (sworn in October 18).
Armenia: Prime Minister Nikol Pashinyan resigns.
China: Former chairman of the government of Xinjiang (1979-85) Ismail Amat dies.
Czech Republic: President Milos Zeman appoints Tomás Petrícek as foreign minister.
Ethiopia: In a cabinet reshuffle, Aisha Mohammed is named defense minister and Ahmed Shide finance minister.
Nigeria: Kayode Fayemi is sworn in as governor of Ekiti.
Greece: Foreign Minister Nikos Kotzias resigns. Prime Minister Alexis Tsipras becomes acting foreign minister; on October 20 he is sworn in as foreign minister.
Bhutan: In the second round of parliamentary elections, Druk Nyamrup Tshogpa wins about 55% of the vote (30 of 47 seats) and Druk Phuensum Tshogpa about 45% (17). Turnout is 70.7%.
India: Former chief minister of Uttar Pradesh (1976-77, 1984-85, 1988-89), foreign minister (1986-87), chief minister of Uttaranchal (2002-07), and governor of Andhra Pradesh (2007-09) Narain Dutt Tiwari dies.
Rwanda: In a cabinet reshuffle, Richard Sezibera is appointed foreign minister and Gen. Albert Murasira defense minister. The new cabinet is sworn in October 19.
The Sudan: Former head of state (1985-86) Abdel Rahman Swar al-Dahab dies.
The Netherlands: Former prime minister (1994-2002) Wim Kok dies.