Lake Manapouri is a lake in the South Island of New Zealand. Its name is Maori for "sorrowful heart", though this name is misapplied due to an early catographical error (the real Lake Manapouri was North Mavora Lake, which lies some distance to the east). Local Maori called Lake Manapouri Moturau, which means "many islands".

Lake Manapouri has four major arms, North, South, West and Hope, and the smaller indentations of Calm Bay and Shallow Bay. The lake contains some 34 islands, 22 of which are wooded. The largest of these is Pomona Island, which lies close to the centre of the lake. Other large islands include Holmwood island, Rona Island, and Mahara Island.

The Waiau River is both a natural inflow and outlet for the lake, flowing into the northeast of the lake from Lake Te Anau, 20 kilometres to the north, and flowing out from Manapouri's southeastern end. The lake's catchment is also largely served by the slopes of the Kepler Mountains, Turret Range and Hunter Mountains which surround all but the eastern shore of the lake. The small settlement of Manapouri lies on the eastern shore between the inflow and outflow of the Waiau, and is a popular destination for tourists.

The lake provides hydro-electric power via Manapouri Power Station, in West Arm, which discharges water through two 10-km tailrace tunnels to Doubtful Sound and the sea.

Wikipedia articles for Lake Manapouri

• Lake Manapouri
• Pomona Island