Gydan
Gydan is:
- Gydan Peninsula , peninsula in the Krasnoyarsk region and in the Yamal-Nenets Autonomous Okrug, northwest Siberia, Russia
 - Gydan (river) , river in the Yamal-Nenets Autonomous Okrug, northwest Siberia, Russia
 - Gydan (locality) , port in the Yamal-Nenets Autonomous Okrug, Northwestern Siberia, Russia
 
- one of the names for the main ridge of the Kolyma Mountains , Eastern Siberia, Russia