Canusio Lake has a total length of 17.2 kilometres (10.7 mi) and a maximum width of 2.4 kilometres (1.5 mi) in its southern part. This lake has a complex shape with an archipelago of islands, several peninsulas and bays. On the west side, this lake has a large swamp area. The surface of this lake is an altitude: 393 metres (1,289 ft).

Canusio Lake is fed by the Saint-Cyr River South (coming from the Northeast) and the Mégiscane River (coming from the South).

The mouth of Lake Canusio is located on the north shore of the lake, at:

• 29.0 kilometres (18.0 mi) northwest of the dam at the mouth of the lac du Poète which allows the diversion of water from the upper part of the Mégiscane River to Gouin Reservoir;
• 31.7 kilometres (19.7 mi) west of a bay on the west shore of Gouin Reservoir;
• 98.8 kilometres (61.4 mi) north-east of the mouth of the Mégiscane River (confluence with Parent Lake (Abitibi);
• 374 kilometres (232 mi) south-east of the mouth of the Nottaway River (confluence with Rupert Bay);
• 65.2 kilometres (40.5 mi) south-west of the village center of Obedjiwan;
• 101.2 kilometres (62.9 mi) south-east of the village center of Lebel-sur-Quévillon.^[1]

The main hydrographic slopes near Canusio Lake are:

• north side: Saint-Cyr Lake (Saint-Cyr River South), Saint-Cyr River South, Cherrier Lake, Mesplet Lake;
• east side: Dumont Lake, Pascagama Lake, Deschamps Lake, Pascagama River;
• south side: Ouiscatis Lake, Pascagama Lake, Mégiscane River, Suzie River;
• west side: Mégiscane lake, Mégiscane river.

• James Bay
• Nottaway River, a watercourse
• Matagami Lake, a body of water
• Bell River, a watercourse
• Parent Lake (Abitibi), a body of water
• Mégiscane River, a watercourse
• Saint-Cyr River South, a watercourse
• Mégiscane Lake, a watercourse
• Senneterre, a city
• List of lakes of Canada