Thandaung Gyi (Phlone ဍုံသင်တင်ဍောဟ်; Burmese: သံတောင်ကြီးမြို့; S'gaw Karen: သါတီကၠံၤတ၀ီ) is a town in Kayin State, Myanmar.

It is the capital of Thandaunggyi Township.

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