Dmytro Valeriyovych Nazarenko (also Deniz Nazar, Ukrainian: Дмитро Валерійович Назаренко; born August 19, 1980) is a Ukrainian-born Turkish former swimmer, who specialized in individual medley events.

[1] He is a fifth-place finalist in the 400 m individual medley at the 2002 European Short Course Swimming Championships in Riesa, Germany (4:12.07).

Swimming in heat three of the men's 400 m individual medley, he edged out Slovenia's Marko Milenkovič to take a fifth seed and twenty-eighth overall by a 1.36-second margin in 4:25.26.

Swimming in heat four on the morning prelims, Nazar saved a seventh spot and twenty-sixth overall against China's Liu Weijia, who finished behind him by less than 0.13 of a second, with a time of 4:26.15.

[7] For his third time in the 400 m individual medley, Nazar challenged five other swimmers in heat one, including two-time Olympians Vasilii Danilov of Kyrgyzstan and Hocine Haciane of Andorra.