Kysyl-Syr (; ) is the name of several inhabited localities in the Sakha Republic, Russia.
Urban localities Kysyl-Syr, Vilyuysky District, Sakha Republic, an urban-type settlement in Vilyuysky District
Rural localities Kysyl-Syr, Namsky District, Sakha Republic, a selo in Khomustakhsky 1-y Rural Okrug of Namsky District