Sayed Ziaoddin Nabavi

Sayed Ziaoddin Nabavi (; born 21 December 1983), also known as Zia Nabavi, is an Iranian student activist. He previously served nine years of a 10-year sentence on charges of "creating unease in the public mind" before being released in February 2018.

Student activism Nabavi studied engineering at Noshirvani University of Technology in Babol, where he served on its Central Council of the Islamic Association. Shortly after, he was arrested at his home along with his cousin , Atefeh Nabavi. He was initially charged with "gathering and colluding against national security"; "propaganda against the system"; "disturbing public order"; and "moharebeh" (enmity against God), as well as accused with being a member of the People’s Mojahedin Organization of Iran, an Iranian dissident group. The charges were later reduced to "creating unease in the public mind", and he was given a sentence of 15 years in prison and 74 lashes. In May 2010, a successful appeal reduced his sentence to ten years. The International Campaign for Human Rights in Iran published a letter from Nabavi in February 2010 in which he stated that he had been held for 100 days of solitary confinement and "subjected to physical and psychological torture".

In July and August 2010, he joined sixteen other prisoners in a hunger strike to protest Evin's conditions after their families were allegedly assaulted by guards during a visiting day on 26 July.