Tyazhinsky District () is an administrative district (raion), one of the nineteen in Kemerovo Oblast, Russia. As a municipal division, it is incorporated as Tyazhinsky Municipal District. It is located in the northeast of the oblast. The area of the district is . Its administrative center is the urban locality (an urban-type settlement) of Tyazhinsky. Population: 32,782 (2002 Census); The population of the administrative center accounts for 43.4% of the district's total population.