Svirstroy (Russian: Свирьстрой) is an urban locality (an urban-type settlement) in Lodeynopolsky District of Leningrad Oblast, Russia, located on the left bank of the Svir River several kilometers northeast of the town of Lodeynoye Pole.

[8] In 1927, a large-scale construction of the Lower Svir Hydroelectric Station started, and subsequently in 1931, the concentration camp of Svirlag was established.

On May 13, 1963, during the abortive Khrushhyov administrative reform, Svirstroy was subordinated to the town of Podporozhye, but on January 13, 1965 it was transferred back to Lodeynopolsky District.

[2] The economy of the settlement is essentially based on the Lower Svir Hydroelectric Station.

A paved road connecting Lodeynoye Pole with Podporozhye and Vytegra passes Svirstroy.