Deniz Seki (July 1, 1970, Istanbul) is a Turkish singer. Her family is rooted from Antalya. They moved to Istanbul from Antalya.
She joined TRT and met Melih Kibar. Through him she worked with Emel and Kenan Doğulu. Deniz's album Hiç kimse Değilim came out in 1997. Since then she has released five other music albums: Anlattim, Şeffaf, Aşkların En Güzeli, Aşk Denizi and Sahici.
In 2006 she appears in the movie Turks in Space.
Although she is an excellent singer and has accomplished a lot with her music, she has been known more for her "relationship" with the married musician Hüsnü Şenlendirici in the last two years. Her fame got even more damaged with the frequent statements of the obviously hurt and betrayed wife of Şenlendirici.
On the 13 February Deniz Seki was detained by police on allegations of cocaine use, after being kept in detention for two days she was released without charge, however, On 23 February 2009 Deniz Seki was rearrested by Drug Squad officers and detained in Zekeriyaköy Gendarmerie station at the request of the public prosecutor.