| Quan Hau | |
| Native Name: | Thị trấn Quán Hàu |
| Settlement Type: | Township |
| Pushpin Map: | Vietnam |
| Pushpin Label Position: | top |
| Pushpin Mapsize: | 300 |
| Pushpin Map Caption: | Location in Vietnam |
| Subdivision Type: | Country |
| Subdivision Type1: | Province |
| Subdivision Name1: | Quảng Bình |
| Subdivision Type2: | District |
| Subdivision Name2: | Quảng Ninh |
| Unit Pref: | Imperial |
| Population As Of: | 2004 |
| Population Blank1 Title: | Ethnicities |
| Timezone: | UTC+7 |
| Utc Offset: | +7 |
| Coordinates: | 17.4061°N 106.6475°W |
Quán Hàu is a township and town in Quảng Ninh District, Quảng Bình Province, Bắc Trung Bộ, Vietnam. The township is the district seat and located on the National Route 1,[1] about 7 km south of the provincial capital Đồng Hới city. The township is the commercial and service center serving surrounding rural areas. Prominent economic activities include: commerce, administrative service.