| Coordinates: | 51.2064°N 10.8133°W |
| Image Plan: | Mittelsömmern in UH.png |
| State: | Thüringen |
| District: | Unstrut-Hainich-Kreis |
| Verwaltungsgemeinschaft: | Bad Tennstedt |
| Elevation: | 290 |
| Area: | 10.08 |
| Postal Code: | 99955 |
| Area Code: | 036041 |
| Licence: | UH |
| Gemeindeschlüssel: | 16 0 64 045 |
| Website: | www.badtennstedt.de |
| Mayor: | Thomas Drengenburg[1] |
| Leader Term: | 2020 - 26 |
Mittelsömmern is a municipality in the Unstrut-Hainich-Kreis district of Thuringia, Germany.