Chernsky District () is an administrative district (raion), one of the twenty-three in Tula Oblast, Russia. As a municipal division, it is incorporated as Chernsky Municipal District. It is located in the southwest of the oblast. The area of the district is . Its administrative center is the urban locality (a work settlement) of Chern. Population: 20,476 (2010 Census); The population of Chern accounts for 31.3% of the district's total population.