The 2009 Istanbul mayoral election for the office of mayor of the Istanbul Metropolitan Municipality (Turkish: İstanbul Büyükşehir Belediye Başkanlığı) was held on 29 March 2009 and was won by the
Justice and Development Party candidate, the incumbent
Kadir Topbaş.
The closely fought contest was noticeable in that it helped launch the national political career of
Kemal Kılıçdaroğlu, who would go on to assume the leadership of his party.