Suoyarvi is a town located in the Republic of Karelia, Russia. It serves as the administrative center of the Suoyarvsky District and is situated approximately 140 kilometers (87 miles) northwest of the city of Petrozavodsk.
According to census data, the population of the town has fluctuated over recent decades. The 2010 census recorded a population of 9,766 residents, following figures of 11,600 in 2002 and 11,772 during the 1989 Soviet census.