Sirin Yazıcıoğlu Cemgil (11 May 1945; Buldan, Denizli, Turkey – 17 April 2009; Duisburg, Germany) was a Turkish lawyer; she was a significant activist in the 1968 student movement.
Actively involved in the 1968 student movement, she participated in the Turkish Workers' Party and the Federation of Clubs of Opinion.
Whilst she was a law student at Ankara University, she married Sinan Cemgil, the symbolic persona of the 1968 movement and student of Middle East Technical University Architecture department, on February 8, 1969.
Her husband Sinan Cemgil, was shot during gendarme raid in the Nurhak Mountains in Kahramanmaraş, where he headed with Deniz Gezmiş and his friends to prepare for the guerilla battle.
Following her husband's death, Cemgil married Mehmet Özler which lasted for a few years.