The June 2019 Istanbul mayoral election was held on 23 June 2019. It was a repeat of the March 2019 mayoral election, which was annulled by the Supreme Electoral Council (YSK) on 6 May 2019. The original election had resulted in a narrow 0.2% margin of victory for opposition candidate Ekrem İmamoğlu, causing the governing Justice and Development Party (AK Party) to successfully petition for a by-election.
The Nation Alliance (formed of the Republican People's Party (CHP) and the Good Party) fielded their initial candidate Ekrem İmamoğlu, who ran a positive campaign under the slogan Her Şey Çok Güzel Olacak (Everything will be fine). The governing People's Alliance (formed by the AK Party and the Nationalist Movement Party) reselected their initially unsuccessful candidate Binali Yıldırım. The non-aligned Peoples' Democratic Party (HDP) did not stand their own candidate and announced their support for İmamoğlu. The election featured a televised debate between the two main candidates, for the first time in Turkey since 2002. Campaigning focused highly on rival accusations of misconduct during and after the initial March 2019 election, during which both sides alleged that they had been a victim of the other's antics.