| Type: | Ortsteil |
| Municipality: | Unstrut-Hainich |
| Coordinates: | 51.1167°N 38°W |
| State: | Thüringen |
| District: | Unstrut-Hainich-Kreis |
| Elevation: | 216 |
| Area: | 11.87 |
| Population: | 417 |
| Stand: | 2017-12-31 |
| Postal Code: | 99986 |
| Area Code: | 036028 |
| Website: | www.flarchheim.de |
Flarchheim is a village and a former municipality in the Unstrut-Hainich-Kreis district of Thuringia, Germany. Since 1 January 2019, it is part of the municipality Unstrut-Hainich.
Flarchheim was the site of the Battle of Flarchheim on January 27, 1080, one of the very few times the Holy Roman Empire attempted to wage a midwinter military campaign in northern Europe.