Tuğba Koyuncu (née Karakaya; born February 16, 1991 in Kayseri, Turkey) is a Turkish middle-distance runner. She is a student of physical education and sports at the local Erciyes University. Karakaya was a member of the Fenerbahçe Athletics Club, where she was coached by Süleyman Altınok before she transferred to Enkaspor. The 169 cm (5 ft 7 in) tall athlete weighs 55 kg (121 lb). She was born to Kasım Karakaya, a restaurant employee, and his wife İkbal, who both have seven children. She is the older of two sisters. She began running at the age of 12.