Mozhaysky District () is an administrative and municipal district (raion), one of the thirty-six in Moscow Oblast, Russia. It is located in the west of the oblast and borders with Smolensk Oblast in the west, Kaluga Oblast in the south, Shakhovskoy District in the north, Volokolamsky District in the northeast, Ruzsky District in the east, and with Naro-Fominsky District in the southeast. The area of the district is . Its administrative center is the town of Mozhaysk. Population: 72,745 (2010 Census); The population of Mozhaysk accounts for 43.1% of the district's total population.
The territory of the district is mostly hilly with the highest point of about above sea level. Major rivers include the Moskva, the Protva, the Luzha, and the Vorya. Mozhaysk Reservoir is located in the district. About 42% of the district's territory is covered by forests.
The district was established in 1929.
The structure of local government bodies of the Mozhaysky District is:
According to the results of the elections on 1 March 2009, the Council of Deputies of the Mozhaysky District has the following party composition: