Rib Lake is a long and narrow lake in the Town of Latchford and in the Municipality of Temagami in Northeastern Ontario, Canada,[1] located about 9 kilometres (6 mi) southeast of the centre of the community of Latchford and 9 kilometres (6 mi) northeast of the community of Temagami North.

The lake is in the Ottawa River drainage basin and is the main access for canoeists en route to Rib Mountain.

With the exception of the very southern tip, the lake is in the South Part of geographic Gillies Limit Township in Timiskaming District,[3] today part of the town of Latchford;[4] the southern tip is in geographic Best Township in Nipissing District,[5] today part of the municipality of Temagami.

The Ontario Northland Railway mainline runs along the entire west side of the lake; the stops/settlements of Freeman and Rib Lake are on west shore.

Ontario Highway 11 (Frontier Route) and the TransCanada pipeline run just west of the lake.