Fischbachsee, Reservoir in the Virngrund near Ellwangen, Germany

Fischbachsee is an artificial lake created in 1971 by damming the Fischbach stream in the Virngrund, between the Ellwangen hamlet of Kalkhöfe and Jagstzell's Dankoltsweiler. It is about 1.2 km long, up to 110 m wide and covers 8.9 hectares at a water level of 429 m above sea level. The Fischbach crosses it from east to west, and the Ellwangen–Jagstzell boundary runs through the water.

Fischbachsee was created in 1971 by the Wasserverband Obere Jagst, which dammed the Fischbach stream to hold back and store its flow during high water. The dam raised the water to a level of 429 m above sea level, flooding the stream's narrow lower valley. The lake marks the boundary between the city of Ellwangen and the municipality of Jagstzell.

The Fischbach flows through the lake from east to west, and the water surface marks the municipal boundary between Ellwangen and Jagstzell. The lake is fed by a stream whose catchment area covers about 17 km², mostly woodland. In summer, bathers use the shore near the parking areas at the upper end and below the dam.

A car park sits at the upper end of the lake near the K 3228, the road from Dankoltsweiler via the Dankoltsweiler Sägmühle to Rindelbach. Two more lie between the dam and the mouth of the Fischbach, reached by a small lane running from Rindelbach via Kalkhöfe to Schweighausen, where it meets the B 290.

A small tree-covered island sits in the upper section of the water, while alder trees grow near the dam, creating their own ecosystem. These features make the site more than a simple water storage and offer interesting things to observe during a visit.