Gantömöriin Dashdavaa (also Dashdavaa Gantumur, Mongolian: Гантөмөрийн Дашдаваа; born January 8, 1981 in Ulaanbaatar) is a Mongolian judoka, who played for the lightweight category. He won a bronze medal for the 66 kg class at the 2002 Asian Games in Busan, South Korea. He also captured two silver medals in the same division at the 2003 Asian Judo Championships in Jeju City, and at the 2004 Asian Judo Championships in Almaty, losing out to South Korea's Jung Bu-Kyung and Kazakhstan's Muratbek Kipshakbayev, respectively.