Lesnoye Sanatorium (Russian: санаторий Лесное) is the oldest medical institution in the city of Tolyatti, Russia.

The newspapers announcing the opening of the health resort noted that medicinal kumis (fermented horse milk) was to be a feature of the therapeutic regime.

The sanatorium applied advanced (for the time) methods of treatment, including the Mantoux test and electrification.

During World War I, the Lesnoye Sanatorium was used as a rehabilitation hospital for wounded soldiers and officers.

Among the cadets trained here were many who became well-known writers, artists and composers, including Vladimir Etush, Andrei Eshpai, S. Lvov, E. Rzhevskaya, and A. Troyanovsky.

In 1980, a large (3 metres (9.8 ft), not including pedestal and base) statue of Lenin which had been installed on the grounds was moved to Central Park to increase its public visibility.

[1] In 1989 a modern seven-story building with 360 beds and kitchens, a dining room, a recreation center, a movie theater, and other services was commissioned.

Tuberculosis patients from all regions of Russia continue to be treated at Lesnoye Sanatorium, which is now owned and operated by the Russian federal government.