Tionesta Creek is a tributary of the Allegheny River in Forest, Clarion, Warren, McKean, and Elk Counties in Pennsylvania in the United States. Together with its West Branch, Tionesta Creek is 61.9 miles (99.6 km) long, flows generally south, and its watershed is 480 square miles (1,243 km²) in area.

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Tionesta Creek
The Tionesta Creek, deep in the Allegheny National Forest.
Location of the mouth of Tionesta Creek in Pennsylvania
Location
Country	United States
State	Pennsylvania
Counties	Warren, McKean, Elk, Clarion, Forest
Physical characteristics
Source
• location	Sheffield, Warren County, Pennsylvania
• coordinates	41°40′36″N 79°2′4″W[1]
• elevation	1,925 ft (587 m)[2]
Mouth	Allegheny River
• location	Tionesta, Forest County, Pennsylvania
• coordinates	41°29′15″N 79°27′24″W[1]
• elevation	1,046 ft (319 m)[2]
Length	61.9 mi (99.6 km)[2]
Basin size	480 sq mi (1,200 km2)[2]
Discharge
• location	Tionesta Creek Dam
• average	906 cu ft/s (25.7 m3/s)[3]
Basin features
Progression	Allegheny River → Ohio River → Mississippi River → Gulf of Mexico
River system	Allegheny River
Tributaries
• left	Mead Run, Thad Shanty Run, Watsontown Run, Rocky Run, Hastings Run, Wildcat Run, Blood Run, Logan Run, Phelps Run, Panther Run, Salmon Creek, Carpenter Run, Lamentation Run, Bear Creek, Little Coon Creek, Coon Creek, Piney Run, Johns Run
• right	Rock Run, Duck Eddy Run, Pell Run, Messenger Run, Bush Creek, Martin Run, Reagan Run, Upper Sheriff Run, Fools Creek, Minister Run, Porcupine Run, Bobbs Creek, Little Minister Creek, Fork Run, Church Run, Ross Run, Jakes Run, Jug Handle Run, Sugar Run, Little Piney Run, Peters Run

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• List of rivers of Pennsylvania
• List of tributaries of the Allegheny River