| Phong Nha | |
| Settlement Type: | Township (Class-5) |
| Official Name: | Phong Nha township |
| Native Name: | Thị trấn Phong Nha |
| Pushpin Map: | Vietnam |
| Pushpin Map Caption: | Location in Vietnam |
| Pushpin Mapsize: | 300 |
| Subdivision Type: | Country |
| Subdivision Type1: | Region |
| Subdivision Name1: | North Central Coast |
| Subdivision Type2: | Province |
| Subdivision Name2: | Quảng Bình |
| Subdivision Type3: | District |
| Subdivision Name3: | Bố Trạch District |
| Unit Pref: | Imperial |
| Area Total Km2: | 99.48 |
| Population Total: | 12.475 |
| Population Density Km2: | 125 |
| Timezone: | UTC + 7 |
| Utc Offset: | +7 |
| Coordinates: | 17.6119°N 106.3053°W |
Phong Nha is a township (thị trấn) in Bố Trạch District, Quảng Bình Province, North Central Coast Region of Vietnam. The township was formerly the rural commune of Sơn Trạch.
Phong Nha township is located by Son River and contains part of Phong Nha-Kẻ Bàng National Park, a UNESCO's World Heritage Site.[1] Tourist service facilities for this national park are located in this township. Phong Nha was a fierce battlefield during the Vietnam War. The local inhabitants live mainly on agriculture and tourism.