From the Wikipedia page 
Olkhonsky District (Russian: Ольхонский райо́н) is an administrative district, one of the thirty-three in Irkutsk Oblast, Russia. Municipally, it is incorporated as Olkhonsky Municipal District. The area of the district is 15,900 square kilometers (6,100 sq mi). Its administrative center is the rural locality (a selo) of Yelantsy.