Jänukjärv is a lake of Estonia. The Piigaste oja stream flows through the lake. The village of Piigaste is located 930 meters from the 11.4-hectare lake and Lake Peipus (Peipsi-Pihkva järv), which is 3555 km² in size, is 40 kilometers away. With an average depth of 3.7 meters and a maximum depth of 9.3 meters, it is quite deep.

• List of lakes of Estonia