Dedovsk (Russian: Де́довск) is a town in Istrinsky District of Moscow Oblast, Russia, located 38 kilometers (24 mi) west of Moscow and 30 kilometers (19 mi) southeast of Istra, the administrative center of the district. Population: 29,108 (2010 census); 27,662 (2002 census); 30,740 (1989 Soviet census). It was previously known as Dedovo/Dedovsky (until 1940).

It was first mentioned in 1573 (453 years ago) (1573) as the village of Dedovo (Де́дово), which would turn into a bigger settlement in the 18th century.^{[citation needed]} In 1913, a textile factory was built in the area, which would give birth to the settlement of Dedovsky (Де́довский) and absorb the village of Dedovo. In 1940, the settlement was granted town status and given its present name.^{[citation needed]}

Within the framework of administrative divisions, it is, together with two rural localities, incorporated within Istrinsky District as the Town of Dedovsk. As a municipal division, the Town of Dedovsk is incorporated within Istrinsky Municipal District as Dedovsk Urban Settlement.