Kirdar (from , "deed") is a surname.
It originally refers to the prominent Iraqi Turkmen Kirdar family, from the city of Kirkuk.
Notable people with the surname are as follows:
Birkan Kirdar (born 2002), Australian association football player Gökhan Kırdar (born 1970), Turkish musician Gözde Kırdar (born 1985), Turkish female volleyball player Lütfi Kırdar (1887–1961), Turkish politician Nemir Kirdar (1936–2020), Iraqi businessman Özge Kırdar (born 1985), Turkish female volleyballer Rena Kirdar Sindi (born 1969), Iraqi author Üner Kirdar (born 1933), Turkish author and United Nations official