| Allendorf | |
| Coordinates: | 50.65°N 21°W |
| Image Plan: | Allendorf in SLF.png |
| State: | Thüringen |
| District: | Saalfeld-Rudolstadt |
| Elevation: | 350 |
| Area: | 8.76 |
| Postal Code: | 07426 |
| Area Code: | 036730 |
| Licence: | SLF |
| Gemeindeschlüssel: | 16 0 73 001 |
| Divisions: | 2 |
| Mayor: | Christian Bechmann[1] |
| Leader Term: | 2019 - 25 |
Allendorf (pronounced as /de/) is a municipality in the district Saalfeld-Rudolstadt, in Thuringia, Germany.