Sug-Aksy is a rural locality located in the Republic of Tuva, Russia. It serves as the administrative center of the Sut-Kholsky District.
According to census data, the population of Sug-Aksy has remained relatively stable over several decades. The 2010 census recorded a population of 3,184 residents, following figures of 3,077 in 2002 and 3,045 during the 1989 Soviet census.