[9] Advancing to the 15 October run-off, Luisa González of the Citizen Revolution Movement secured first place with 33% of the vote, while Daniel Noboa of the National Democratic Action came in second with 24%.

[10][11] Noboa's second-place finish was considered surprising and an upset, with his debate performance seen as a key factor in his rise in popularity.

[12] Noboa ultimately defeated González in the runoff election, securing 52% of the vote, a result similar to Guillermo Lasso's victory in 2021.

[14][15] On 17 May 2023, a day after he presented his defense in an impeachment process against him, President Lasso invoked the muerte cruzada mechanism provided for in Article 148 of the 2008 Constitution to dissolve the National Assembly, bringing forward legislative and presidential elections.

[16] On 18 May, Diana Atamaint, the president of the National Electoral Council (CNE), announced 20 August 2023 as the tentative date for the legislative election and the first round of the presidential vote.

[19] The National Police claimed to have used chemical agents to protect security and public order because of the hostile behavior of González's supporters.

[22] The assassination of Villavicencio made international news, prompting condemnation of the attack and condolences by foreign countries as well as the Organization of American States, who called for an investigation.

[30] The remaining 116 members are elected from multi-member constituencies by closed list proportional representation, with all seats allocated using the Webster method.

[32] That same day, former National Assembly member and journalist Fernando Villavicencio announced his campaign with the support of the Movimiento Construye Party.

[36] The next day, former Azuay Provincial Prefect and 2021 presidential candidate Yaku Pérez Guartambel announced his candidacy and was endorsed by the Claro Que Se Puede Alliance and Pachakutik.

[42] On 13 July 2023, the National Electoral Council (CNE) officially confirmed the eight candidacies of Armijos, González, Hervas, Noboa Azín, Pérez Guartambel, Sonnenholzner, Topić and Villavicencio.

[11] Also advancing to the run-off was businessman Daniel Noboa, whose second place finish was seen as a surprise as his polling numbers were low in the days before the election.

[11] Also on the ballot were votes on a referendum on oil exploitation in the Yasuní National Park and a local one on metallic mining in the Chocó Andino.

[6][8] Voters voted to approve both measures, banning both oil exploitation in the Yasuní National Park, and metallic mining in the Chocó Andino.