Tuğba Koyuncu (née Karakaya; born February 16, 1991, in Kayseri, Turkey) is a Turkish middle-distance runner.

Karakaya was a member of the Fenerbahçe Athletics Club, where she was coached by Süleyman Altınok before she transferred to Enkaspor.

[2] She was born to Kasım Karakaya, a restaurant employee, and his wife İkbal, who both have seven children.

[1] She won a silver medal in 1500 m event at the 2011 European Athletics U23 Championships in Ostrava, Czech Republic.

At the 2013 Islamic Solidarity Games held in Palembang, Indonesia, Koyuncu won also a bronze medal in the 800 m event.