Tolstaya Dubrova (Russian: Толстая Дуброва) is a rural locality (a selo) and the administrative center of Dubrovsky Selsoviet, Aleysky District, Altai Krai, Russia.

Tolstaya Dubrova is located on the Beloborodskoye Lake, 46 km southeast of Aleysk (the district's administrative centre) by road.

Oskolkovo is the nearest rural locality.

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