Mariinsky District () is an administrative district (raion), one of the nineteen in Kemerovo Oblast, Russia. As a municipal division, it is incorporated as Mariinsky Municipal District. It is located in the north of the oblast. The area of the district is . Its administrative center is the town of Mariinsk (which is not administratively a part of the district). Population: 19,182 (2002 Census);
Within the framework of administrative divisions, Mariinsky District is one of the nineteen in the oblast. The town of Mariinsk serves as its administrative center, despite being incorporated separately as a town under oblast jurisdictionâÂÂan administrative unit with the status equal to that of the districts.
As a municipal division, the district is incorporated as Mariinsky Municipal District, with Mariinsk Town Under Oblast Jurisdiction being incorporated within it as Mariinskoye Urban Settlement.