Korotoyak (Russian: Коротояк) is the name of several rural localities in Russia:
- Korotoyak, Altai Krai, a selo in Korotoyaksky Selsoviet of Khabarsky District in Altai Krai; 53°45′N 79°40′E / 53.750°N 79.667°E
- Korotoyak, Voronezh Oblast, a selo in Korotoyakskoye Rural Settlement of Ostrogozhsky District in Voronezh Oblast