Lyambirsky District
Lyambirsky District (; ; ) is an administrative and municipal district (raion), one of the twenty-two in the Republic of Mordovia, Russia. It is located in the northern and central parts of the republic. The area of the district is . Its administrative center is the rural locality (a "selo") of Lyambir. As of the 2010 Census, the total population of the district was 34,142, with the population of Lyambir accounting for 24.8% of that number. Administrative and municipal status. Within the framework of administrative divisions, Lyambirsky District is one of the twenty-two in the republic. The district is divided  into sixteen selsoviets which comprise seventy rural localities. As a municipal division, the district is incorporated as Lyambirsky Municipal District. Its sixteen selsoviets are incorporated into sixteen rural settlements within the municipal district. The "selo" of Lyambir serves as the administrative center of both the administrative and municipal district.