Barguzinsky District (Russian: Баргузи́нский райо́н; Buryat: Баргажанай аймаг, Bargajanai aimag) is an administrative and municipal district (raion), one of the twenty-one in the Republic of Buryatia, Russia. It is located in the northeast of the republic. The area of the district is 18,553 square kilometers (7,163 sq mi). Its administrative center is the rural locality (a selo) of Barguzin. As of the 2010 Census, the total population of the district was 23,598, with the population of Barguzin accounting for 24.2% of that number.