The Wisper is a 29.7-kilometre-long (18.5 mi) river in Hesse, Germany, right tributary of the Rhine. Its source is in the western Taunus, Rheingau-Taunus-Kreis district, near a small village named Wisper (municipality Heidenrod). It flows southwest through a densely forested valley with some medieval castle ruins surrounded by a popular hiking area. A man-made lake, the Wispersee, is stocked with trout and is a popular fishing destination. The Wisper flows into the Rhine at Lorch.

Wisper
Wisper at Lorch
Location
Country	Germany
State	Hesse
Physical characteristics
Source
• location	Taunus
Mouth
• location	Rhine
• coordinates	50°02′34″N 7°48′05″E / 50.0429°N 7.8014°E / 50.0429; 7.8014
Length	29.7 km (18.5 mi) [1]
Basin size	209 km2 (81 sq mi) [1]
Basin features
Progression	Rhine→ North Sea

The river ran through the temporary state Free State Bottleneck from 1919 to 1923.