The Central District of Nain County (Persian: بخش مرکزی شهرستان نایین) is a district (bakhsh) in Nain County, Isfahan Province, Iran. At the 2006 census, its population was 33,906, in 10,025 families. The District has one city: Nain. The District has four rural districts (dehestan): Bafran Rural District, Baharestan Rural District, Kuhestan Rural District, and Lay Siyah Rural District.