Gydan may refer to:
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Gydan Peninsula
The Gyda Peninsula () is a geographical feature of the Siberian coast in the Kara Sea. It takes its name from the river Gyda, that flows on the peninsula. It is roughly 400 km long and 360 km wide. This wide peninsula lies between t ...
, a peninsula in the Kara Sea
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Gydan Bay, a bay in the Kara Sea
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Gydan Nature Reserve, the northernmost nature reserve in Western Siberia
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Gydan Mountains, an obsolete name for the Kolyma Mountains
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Yamal-Gydan tundra, an ecoregion in Northern Siberia
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