Kiasar (, also Romanized as Kīāsar, Keyāsar, and Kīya Sar) is a city in and capital of Chahardangeh District, in Sari County, Mazandaran Province, Iran. At the 2006 census, its population was 3,590, in 913 families.
Kiasar is a city in Mazandaran Province, Iran.
Kiasar may also refer to:
- Kiasar, Alborz
- Kiasar, Gilan
- Kiasar, Behshahr, Mazandaran Province