Ölgii is the capital of the Bayan-Ölgii Aimag of Mongolia, located in the extreme west of the country on the banks of the Khovd River. It lies o…Ölgii is the capital of the Bayan-Ölgii Aimag of Mongolia, located in the extreme west of the country on the banks of the Khovd River. It lies on an altitude of 1,710 meters. As of 2024 it had a population of 50,126 people.