Nipissing River
Location of the mouth of the Nipissing River in Ontario
Location
Country	Canada
Ontario	Ontario
Region	Northeastern Ontario
District	Nipissing
Part	Nipissing, Unorganized South
Physical characteristics
Source	Big Bob Lake
• location	Paxton Township
• coordinates	45°46′34″N 79°03′36″W / 45.77611°N 79.06000°W / 45.77611; -79.06000
• elevation	449 m (1,473 ft)
Mouth	Cedar Lake on the Petawawa River
• location	Lister Township
• coordinates	46°00′22″N 78°31′01″W / 46.00611°N 78.51694°W / 46.00611; -78.51694
• elevation	308 m (1,010 ft)
Basin features
River system	Saint Lawrence River drainage basin

The Nipissing River is a river in the Saint Lawrence River drainage basin in the Unorganized South Part of Nipissing District in northeastern Ontario, Canada.^[1][2] The river is entirely within Algonquin Provincial Park, and is a left tributary of the Petawawa River.

The river begins at Big Bob Lake in geographic Paxton Township and flows east, passes briefly through geographic Butt Township and geographic Devine Township, turns north into geographic Biggar Township, then back east, over Stewart's Dam and through the Allen Rapids, and into geographic Osler Township. It continues east over Graham's Dam, the High Falls and Gauthier's Dam, enters geographic Lister Township, flows over the Perley Dam and Rolling Dam, and empties into Cedar Lake on the Petawawa River, across the lake from the community of Brent. The Petawawa flows via the Ottawa River to the Saint Lawrence River.

• Plumb Creek (right)
• Nadine Creek (left)
• Osler Creek (left)
• Coldspring Creek (right)
• Kelley Creek (left)
• Gibson Creek (left)
• Squawk Creek (right)
• Wolfland Creek (left)
• Beaverpaw Creek (right)
• Shag Creek (right)
• Loontail Creek (right)
• Chibiabos Creek (right)

• List of rivers of Ontario