Eyvanki District (Persian: بخش ایوانکی) is a district (bakhsh) in Garmsar County, Semnan Province, Iran. At the 2006 census, its population was 17,324, in 3,555 families. The District has one city: Eyvanki. The District has one rural district (dehestan): Eyvanki Rural District. Tati is the main language of the district.