Sema Aydemir (born 17 August 1985) is a Turkish female sprinter, who is specializes in the 400m hurdles event.

The 1.69 m (5 ft 7 in) tall athlete at 54 kg (119 lb) is a member of Enkaspor, where she is coached by Tayfun Aygün.

Sema Apak qualified for participation in the 4 × 400 m relay event at the 2012 Summer Olympics.

[3] She is married to Olympic bronze medalist hammer thrower Eşref Apak.

[5] At the 2013 Islamic Solidarity Games held in Palembang, Indonesia, she won a gold medal in the 4x100 event with teammates Saliha Özyurt, Birsen Engin and Nimet Karakuş, a silver medal in the 4x400 event with teammates Özge Akın, Birsen Engin and Esma Aydemir as well as a bronze medal in the long jump event.