The Juodkiškiai Reservoir is an artificial lake in Kėdainiai District Municipality, central Lithuania. It is located 2 kilometres (1.2 mi) east from Kėdainiai, next to Taučiūnai village. It was created in 1980, when a dam on the Obelis river was built next to Juodkiškiai hamlet. In 1995, the dam was reconstructed and a small hydroelectric plant (of 510 kW) built.

Shores of the reservoir are low; agriculture lands stretch around the lake. The Bubliai Reservoir and some smaller reservoirs (the Koliupė Reservoir, the Malčius Reservoir) empty into the Juodkiškiai Reservoir. The A8 highway crosses the lake.