| Type: | Ortsteil |
| Town: | Nottertal-Heilinger Höhen |
| Coordinates: | 51.1667°N 50°W |
| State: | Thüringen |
| District: | Unstrut-Hainich-Kreis |
| Elevation: | 200 |
| Area: | 3.44 |
| Population: | 126 |
| Stand: | 2018-12-31 |
| Postal Code: | 99947 |
| Area Code: | 036043 |
| Website: | www.kleinwelsbach.de |
Kleinwelsbach is a village and a former municipality in the Unstrut-Hainich-Kreis district of Thuringia, Germany. Since December 2019, it is part of the town Nottertal-Heilinger Höhen.