Mariinsko-Posadsky District

Mariinsko-Posadsky District (Марии́нско-Поса́дский район; Сĕнтĕрвăрри районӗ, Sĕntĕrvărri rayonĕ) is an administrative and municipal district (raion), one of the twenty-one in the Chuvash Republic, Russia. It is located in the northeast of the republic. The area of the district is 686.1 km2. Its administrative center is the town of Mariinsky Posad. Population: 26,959 (2002 Census);  The population of Mariinsky Posad accounts for 38.0% of the district's total population.