Cowanesque River

{{Use American English|date=February 2025}}

{{Infobox river

| name = Cowanesque River

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| image = Cowanesque River.jpg

| image_caption = Cowanesque River near the Pennsylvania/New York border

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| pushpin_map = USA New York

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| pushpin_map_caption= Location of the mouth of the Cowanesque River in New York State.

| subdivision_type1 = Country

| subdivision_name1 = United States

| subdivision_type2 = State

| subdivision_name2 = Pennsylvania, New York

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| length = {{convert|41.4|mi|km|abbr=on}}

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| source1_location = Near Ulysses, Potter County, Pennsylvania

| source1_coordinates= {{coord|41|55|33|N|77|43|43|W|display=inline}}

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| mouth = Tioga River

| mouth_location = Near Lawrenceville, Pennsylvania, Steuben County, New York

| mouth_coordinates = {{coord|42|00|05|N|77|06|58|W|display=inline,title}}

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The Cowanesque River is a {{convert|41.4|mi|km|adj=mid|-long}}U.S. Geological Survey. National Hydrography Dataset high-resolution flowline data. [http://viewer.nationalmap.gov/viewer/ The National Map] {{webarchive |url=https://web.archive.org/web/20120329155652/http://viewer.nationalmap.gov/viewer/ |date=2012-03-29 }}, accessed August 8, 2011 tributary of the Tioga River in Potter and Tioga counties, Pennsylvania, and Steuben County, New York, in the United States.{{cite GNIS|947597|Cowanesque River|April 18, 2016}} It joins the Tioga River soon after crossing from Pennsylvania into New York, near the borough of Lawrenceville, Pennsylvania.Gertler, Edward. Keystone Canoeing, Seneca Press, 2004. {{ISBN|0-9749692-0-6}}

The name of the Cowanesque River is of Native American origin, derived either from Go-wan-is-que ("briary or thorn bushy"), or from Ka-hwe-nes-ka ("on the long island").{{cite book |last1=Beauchamp |first1=William Martin |title=Aboriginal Place Names of New York (New York State Museum Bulletin, Volume 108) |date=1907 |publisher=New York State Education Department |page=207 |url=https://books.google.com/books?id=MBQTAAAAYAAJ&pg=PA207 |access-date=April 18, 2016}}

In Tioga County, the Cowanesque Dam was constructed by the US Army Corps of Engineers in 1980. The dam created Cowanesque Lake, which helps prevent flooding within the valley. The {{convert|1085|acre|km2|adj=on}} lake also facilitates various forms of recreation; the Tompkins Recreation Area and Campground is located along the lake's north shore, and the south shore hosts two day-use areas.{{cite web |url=https://www.nab.usace.army.mil/Missions/Dams-Recreation/Cowanesque-Lake/ |title=Cowanesque Lake |publisher=US Army Corps of Engineers |access-date=April 19, 2016}}