Nadvoitsy (Russian: Надво́ицы; Karelian: Vojačču; Finnish: Vojatsu) is an urban locality (an urban-type settlement) in Segezhsky District of the Republic of Karelia, Russia, located on the shore of Lake Vygozero, 287 kilometers (178 mi) north of Petrozavodsk, the capital of the republic.

[citation needed] Urban-type settlement status was granted to it in 1942.

[citation needed] Within the framework of administrative divisions, the urban-type settlement of Nadvoitsy is subordinated to Segezhsky District.

[1] As a municipal division, Nadvoitsy, together with six rural localities, is incorporated within Segezhsky Municipal District[3] as Nadvoitskoye Urban Settlement.

In 2013, the aluminum production became unprofitable, and the plant stopped operation, with the prospective of being scrapped.