40 let Oktyabrya (Russian: 40 лет Октября) is a rural locality (a settlement) in Dzerzhinskoye Rural Settlement of Kashirsky District, Russia.

[1] 40 let Oktyabrya is located 44 km west of Kashirskoye (the district's administrative centre) by road.

Imeni Dzerzhinskogo is the nearest rural locality.

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