| Subject Name: | Altdorf |
| Municipality Type: | former |
| Canton: | Schaffhausen |
| Iso-Code-Region: | CH-SH |
| District: | n.a. |
| Coordinates: | 47.7833°N 47°W |
| Postal Code: | 8243 |
| Municipality Code: | 2911 |
| Area: | 3.04 |
| Elevation: | 516 |
| Population: | 208 |
| Populationof: | December 2007 |
| Popofyear: | 2007 |
| Neighboring Municipalities: | Hofen, Opfertshofen, Tengen (DE-BW) |
Altdorf was a municipality in the canton of Schaffhausen in northern Switzerland. On 1 January 2009 Altdorf merged with Bibern, Hofen, Opfertshofen and Thayngen to form the municipality of Thayngen.[1]