| Settlement Type: | Town |
| Official Name: | Thandaung Gyi |
| Native Name: | |
| Pushpin Label Position: | bottom |
| Pushpin Map: | Myanmar |
| Pushpin Map Caption: | Location in Myanmar (Burma) |
| Subdivision Type: | Country |
| Subdivision Type1: | State |
| Subdivision Type2: | District |
| Subdivision Name2: | Hpa-an District |
| Subdivision Type3: | Township |
| Subdivision Name3: | Thandaunggyi Township |
| Unit Pref: | Imperial |
| Population: | 16,056[1] |
| Population As Of: | 2014 |
| Population Blank1 Title: | Ethnicities |
| Population Blank2: | Christian |
| Population Blank2 Title: | Religions |
| Population Density Km2: | auto |
| Coordinates: | 19.0734°N 96.6755°W |
| Leader Title: | Mayor |
| Timezone: | MMT |
| Utc Offset: | +6.30 |
Thandaung Gyi (Phlone ; Burmese: သံတောင်ကြီးမြို့; သါတီကၠံၤတ၀ီ) is a town in Kayin State, Myanmar. It is the capital of Thandaunggyi Township.