Yeravninsky District (; , Yaruunyn aimag) is an administrative and municipal district (raion), one of the twenty-one in the Republic of Buryatia, Russia. It is located in the east of the republic. The area of the district is . Its administrative center is the rural locality (a selo) of Sosnovo-Ozerskoye. As of the 2010 Census, the total population of the district was 18,705, with the population of Sosnovo-Ozerskoye accounting for 32.8% of that number.
The territory of the district is bound by foothills of large mountain ranges on all sides: from the southeast the spurs of the Yablonoi Mountains, from the south the Tsagan-Khurtei Range and from the west the Selenga Highlands. The Konda River flows across the district. The Yeravna-Khorga Lake System is located in the western part.
The district was established on September 26, 1927.
Within the framework of administrative divisions, Yeravninsky District is one of the twenty-one in the Republic of Buryatia. The district is divided into six selsoviets and eight somons, which comprise twenty-two rural localities. As a municipal division, the district is incorporated as Yeravninsky Municipal District. Its six selsoviets and eight somons are incorporated as fourteen rural settlements within the municipal district. The selo of Sosnovo-Ozerskoye serves as the administrative center of both the administrative and municipal district.