Talsperre Carlsfeld, Drinking water reservoir in Carlsfeld, Eibenstock, Germany

Talsperre Carlsfeld is a reservoir near the Carlsfeld district of Eibenstock, Saxony, held back by a curved gravity dam of quarry-stone masonry built according to the Intze principle. The dam impounds the Wilzsch, a tributary of the Zwickauer Mulde, and its crown can be walked.

Built between 1926 and 1929 by the Leipzig firm Eduard Steyer, the dam flooded the scattered settlement of Weiterswiese, whose eight houses were demolished. In 1927 the Saxon state parliament debated the project, discussing barracks for the workers, employment of unemployed fathers from the Upper Ore Mountains, mileage allowances and the provision of tools and work clothing.

The reservoir is named after Carlsfeld, the Eibenstock district it lies in; its other names, Talsperre Weiterswiese and Wilzschtalsperre, recall the hamlet of 8 houses demolished for the dam and the Wilzsch stream it impounds. The dam is a protected heritage monument, and a model at the eastern end of the wall shows its masonry build as restored in 1997–2000.

The reservoir sits in a hiking area and can be viewed from pathways around the facility, with most of these trails well-marked. The site is best accessed by driving local roads from Eibenstock.

In spring 2010 the water level was lowered and the remains of a historic tin-washing site (cassiterite) were documented on the exposed bed. Finds include a wooden box of split planks measuring 2.5 × 1.0 × 0.5 m, whose fine sediments suggest a settling channel. A board near the dam recalls the 22 June 1998 tornado that felled trees along a 6 km strip.