The March 2019 Istanbul mayoral election took place on 31 March 2019, as part of the 2019 Turkish local elections. In addition to a mayor for the Istanbul Metropolitan Municipality, all 39 Istanbul districts elected their own individual mayors as well as district councillors.
Early results on election night showed that People's Alliance candidate Binali Yıldırım held a small lead over his Nation Alliance rival Ekrem İmamoğlu. However, as the lead narrowed and a blackout occurred over the reporting of new results, İmamoğlu overtook Yıldırım according to the Supreme Electoral Council (YSK) on noon on 1 April. Both candidates declared victory, with banners showing Yıldırım's image and the message 'thank you Istanbul' appearing in numerous places overnight.