Sim is a town in Ashinsky District of Chelyabinsk Oblast, Russia. It is located on the Sim River, 340 kilometers west of Chelyabinsk and is t…Sim is a town in Ashinsky District of Chelyabinsk Oblast, Russia. It is located on the Sim River, 340 kilometers west of Chelyabinsk and is the administrative center of the oblast. Population: 14,466 ; 16,377 ; 20,164.