| Coordinates: | 51.1833°N 26°W |
| Image Plan: | Südeichsfeld in UH.png |
| State: | Thüringen |
| District: | Unstrut-Hainich-Kreis |
| Elevation: | 310 |
| Area: | 63.8 |
| Postal Code: | 99976, 99988 |
| Area Code: | 036027 |
| Licence: | UH |
| Gemeindeschlüssel: | 16 0 64 074 |
| Mayor: | Abdreas Dieter Henning[1] |
| Leader Term: | 2024 - 30 |
Südeichsfeld is a municipality in the Unstrut-Hainich-Kreis district, Thuringia, Germany. It was formed by the merger of the previously independent municipalities Heyerode, Katharinenberg, Hildebrandshausen and Lengenfeld unterm Stein, on 1 December 2011. On 1 January 2024, it absorbed the former municipality Hallungen.[2]