Mariinsky Posad (Russian: Марии́нский Поса́д; Chuvash: Сĕнтĕрвăрри, Sĕntĕrvărri) is a town and the administrative center of Mariinsko-Posadsky District of the Chuvash Republic, Russia, located on the right bank of the Volga River, 36 kilometers (22 mi) east of Cheboksary. Population: 9,089 (2010 Census preliminary results); 10,273 (2002 Census); 10,443 (1989 Census).