Voin may refer to:
- Voin, alternative name of Vainius (fl. 1315–1338/1342), Prince of Polotsk
- Voin Rimsky-Korsakov (1822–1871), Russian navigator and geographer
- Voin (rural locality), a rural locality (a selo) in Namsky District of the Sakha Republic, Russia
Voin is a rural locality (a selo) in Khomustakhsky 2-y Rural Okrug of Namsky District in the Sakha Republic, Russia, located from Namtsy, the administrative center of the district and from Khatas, the administrative center of the rural okrug. Its population as of the 2002 Census was 57.