| Type: | Ortsteil |
| Town: | Dingelstädt |
| Helmsdorf | |
| Image Coa: | Wappen Helmsdorf (Eichsfeld).png |
| Coordinates: | 51.2967°N 10.3511°W |
| State: | Thüringen |
| District: | Eichsfeld |
| Elevation: | 306 |
| Area: | 5.23 |
| Population: | 501 |
| Stand: | 2017-12-31 |
| Postal Code: | 37351 |
| Area Code: | 036075 |
| Licence: | EIC |
Helmsdorf is a village and a former municipality in the district of Eichsfeld in Thuringia, Germany. Since 1 January 2019, it is part of the town Dingelstädt. It is situated on the upper course of the river Unstrut, 12 km northwest of Mühlhausen.