Kadoshkinsky District (Russian: Кадо́шкинский райо́н; Moksha: Кадажень аймак; Erzya: Кадоньбуе) is an administrative and municipal district (raion), one of the twenty-two in the Republic of Mordovia, Russia. It is located in the center of the republic. The area of the district is 618.6 square kilometers (238.8 sq mi). Its administrative center is the urban locality (a work settlement) of Kadoshkino. As of the 2010 Census, the total population of the district was 7,970, with the population of Kadoshkino accounting for 59.0% of that number.