Dzhidinsky District (; ) is an administrative and municipal district (raion), one of the twenty-one in the Republic of Buryatia, Russia. It is located in the south of the republic. The area of the district is . Its administrative center is the rural locality (a selo) of Petropavlovka. As of the 2010 Census, the total population of the district was 29,352, with the population of Petropavlovka accounting for 25.4% of that number.