Kadir Topbaş (1945) is a Turkish architect, right-wing regional politician and the current mayor of İstanbul Province in Turkey.
He was born on January 8, 1945 in Altıparmak village of Yusufeli district in Artvin Province, Turkey. Kadir Topbaş moved in 1946 with his family to İstanbul. He earned a PhD in architectural history from Istanbul University following his education of theology in 1972 and architecture in 1974. After working as preacher in Edirne, teacher and freelance architect in İstanbul, he served between 1994 and 1998 as advisor to Mayor Recep Tayyip Erdoğan for the restoration and decoration of palaces and other historical buildings in İstanbul.
He entered politics as member of the religious oriented Milli Selamet Partisi (MSP) and became deputy mayor of Beyoğlu district in İstanbul, where he lives. Later on, Topbaş ran twice for the deputy of Artvin province in the parliament, first in 1977 from the MSP and then in 1987 from Refah Partisi (RP) without success. In 1999, he was elected mayor of Beyoğle district from the Fazilet Partisi (FP). In the 2004 regional elections, Kadir Topbaş ran for the post of mayor of İstanbul from the Adalet ve Kalkınma Partisi (AKP) and won. He is mayor of İstanbul since March 28, 2004.
He is married and has two sons and a daughter.