Rideau Lakes is a township located within Leeds and Grenville United Counties in Eastern Ontario, Canada.

[2] Rideau Lakes lies in the northwest corner of Leeds and Grenville, and is geographically the largest municipality in the county.

The waterway itself traverses the township, from the towering granite cliffs near Chaffeys Lock to the more gentle and pastoral areas of the Lower Rideau Lake.

[3] Rideau Lakes contains many villages and hamlets, including Chaffeys Lock, Chantry, Crosby, Daytown, Delta, Elgin, Forfar, Freeland, Harlem, Jones Falls, Lombardy, Morton, Newboro, Newboyne, Philipsville, Plum Hollow, Portland, Rideau Ferry, and Scotch Point.

A plaque was erected by the Ontario Heritage Foundation commemorating the founding of Newboro with the building of the Rideau Canal in 1826–32.

The economic development of the community was enabled by the shipment of iron ore from local mines via the Rideau canal to smelters in Pittsburgh and Cleveland during the latter part of the 19th century.