Koç, Nevbahar (b. March 10, 1972, İstanbul), née DEMİRAĞ, daughter of Turgut Demirağ and Afet Demirağ (later Karacan), and wife of Ali Y. Koç, the third son of Rahmi Koç and Çiğdem Koç (later Simavi).
Completing her elementary education in the USA, she continued her secondary education in Turkey, and received an undergraduate degree in fine arts from Loyola Marymount University in Los Angeles (1996). On October 21, 2005 she married Ali Y. Koç, and the couple had two children named Leyla Sadberk (b. 2006) and Kerim Rahmi (b. 2008) (see Koç family).
Nevbahar Koç is a current member of the board of directors of the Open Door Social Responsibility Association. She published a book in 2017, titled Bosphorus Private, written together with İrem Kınay and introducing 20 mansions on the Bosphorus.