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List of U.S. rivers by discharge

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This is a list of rivers in the continental United States by average discharge (streamflow) in cubic feet per second. All rivers with average discharge more than 15,000 cubic feet per second are listed. Estimates are approximate, because data are variable with time period measured and also because many rivers lack a gauging station near their point of outflow.

No	River	Length (km)	Length (miles)	Average discharge (cf/s)	Outflow
1	Mississippi River	3,730	2,320	593,000^[1]	Gulf of Mexico
2	Ohio River	1,575^[2]	979^[2]	281,500^[3]	Mississippi River
3	St. Lawrence River	965^[2]	600	348,000^[1] (275,000 at U.S.-Canada boundary)	Gulf of Saint Lawrence
4	Columbia River	2,000^[2]	1,243^[2]	273,000^[2]	Pacific Ocean
5	Yukon River	3,185^[2]	1,980^[2]	227,000^[1]	Bering Sea
6	Atchafalaya River	220	137	225,000^[1]	Gulf of Mexico
7	Niagara River	58	36	204,700^[1]	Lake Ontario
8	Detroit River	51	32	188,000^[1]	Lake Erie
9	St. Clair River	63	39	183,000^[1]	Lake St. Clair
10	Missouri River	3,767^[2]	2,341^[2]	86,300	Mississippi River
11	St. Marys River	120	75	75,000^[1]	Lake Huron-Lake Michigan
12	Tennessee River	1,049	652	68,000^[1]	Ohio River
13	Mobile River	72	45	67,000^[1]	Gulf of Mexico
14	Kuskokwim River	1,130^[2]	702^[2]	67,000^[1]	Bering Sea
15	Red River	2,190	1,360	58,000^[1]	Atchafalaya River
16	Copper River	470	290	57,400^[1]	Gulf of Alaska
17	Snake River	1,674^[2]	1,040^[2]	55,000^[4]	Columbia River
18	Stikine River	610	379	56,000^[1]	Pacific Ocean
19	Susitna River	504	313	51,000^[1]	Gulf of Alaska
20	Arkansas River	2,322^[2]	1,443^[2]	44,500^[5]	Mississippi River
21	Tanana River	940^[2]	584^[2]	41,800^[2]	Yukon River
22	Saint John River	673 ^[6]	418 ^[6]	38,800 ^[6]	Bay of Fundy
23	Susquehanna River	747	464	38,200^[1]	Chesapeake Bay
24	Willamette River	301	187	37,400^[1]	Columbia River
25	Wabash River	810^[2]	503^[2]	34,500^[7]	Ohio River
26	Alabama River	512	318	32,500^[8]	Mobile River
27	Nushagak River	450	280	32,000?^[9]	Bering Sea
28	Alsek River	386	240	31,000^[10]	Gulf of Alaska
29	Cumberland River	1,120^[2]	696^[2]	30,000?	Ohio River
30	Black River-Ouachita River	974^[2]	605^[2]	29,800^[2]	Red River
31	White River	1,159^[2]	720^[2]	29,500^[11]	Mississippi River
32	Pend Oreille River	210	130	27,000^[12]	Columbia River
33	Tombigbee River	320	200	26,300^[8]	Mobile River
34	Koyukuk River	684	425	25,000?^[13]	Yukon River
35	Illinois River	439	273	24,000^[14]	Mississippi River
36	Sacramento River	719	447	23,500^[15]	Pacific Ocean
37	Porcupine River	916	569	23,000^[1]	Yukon River
38	Colorado River	2,330^[2]	1,450^[2]	22,000^[1]	Gulf of California
39	Clark Fork River	500	310	21,900^[16]	Pend Oreille River
40	Hudson River	507	315	21,900^[17]	Atlantic Ocean
41	Yentna River	121	75	21,000?^[10]	Susitna River
42	Chitina River	180	112	20,000?	Copper River
43	Allegheny River	523	320	19,900^[18]	Ohio River
44	Apalachicola River	80	50	19,602^[19]	Gulf of Mexico
45	Connecticut River	655	407	18,400	Atlantic Ocean
46	Kvichak River	80	50	17,900^[10]	Bering Sea
47	Klamath River	423	263	17,300^[20]	Pacific Ocean
48	Santee River	230	143	17,000(approx.)^[9]	Atlantic Ocean
49	Skagit River	240	150	16,500	Pacific Ocean
50	Kootenai (Kootenay) River	781	485	27,600 (approx. 16,000? at U.S.-Canada boundary)	Columbia River
51	Coosa River	450	280	16,000^[21]	Alabama River
52	Kanawha River	156	97	16,000^[22]	Ohio River
53	Clearwater River	120	75	15,300^[23]	Snake River
54	Kobuk River	451	280	15,300^[10]	Bering Sea
55	St. Johns River	500	310	15,000?	Atlantic Ocean
56	Pee Dee River	373	232	15,000?^[9]	Atlantic Ocean

References

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^ ^a ^b ^c ^d ^e ^f ^g ^h ⁱ ^j ^k ^l ^m ⁿ ^o ^p ^q ^r ^s U.S. Geological Survey (1992). "Largest Rivers in the United States" (PDF).

^ ^a ^b ^c ^d ^e ^f ^g ^h ⁱ ^j ^k ^l ^m ⁿ ^o ^p ^q ^r ^s ^t ^u ^v ^w ^x ^y ^z ^aa ^ab ^ac ^ad Benke, Arthur C., ed., and Cushing, Colbert E., ed. Rivers of North America. Burlington, Mass.: Elsevier Academic Press. {{cite book}}: |author= has generic name (help)CS1 maint: multiple names: authors list (link)

^ Leeden, Frits van der (1990). The Water Encyclopedia (2nd ed.). Chelsea, Mich.: Lewis Publishers. p. 126. ISBN 0-87371-120-3.

^ "Snake River below Ice Harbor Dam, WA" (PDF). National Water Information System. United States Geological Survey. 1963–2000. Retrieved 20 April 2011.

^ U.S. Geological Survey (1949). "Large Rivers of the United States, Circular 44" (PDF).

^ ^a ^b ^c "Saint John River". The Canadian Encyclopedia. Archived from the original on 27 December 2018. Retrieved 27 December 2018.

^ "USGS Water Data for Indiana".

^ ^a ^b "USGS Water Data for Alabama".

^ ^a ^b ^c ""U.S. Geological Survey National Water Summary 1985: State Summaries of Surface-Water Resources". 1987.

^ ^a ^b ^c ^d "USGS Water Data for Alaska".

^ "USGS Water Data for Arkansas".

^ "USGS Gage #12396500 on the Pend Oreille River below Box Canyon, near Ione, WA" (PDF). National Water Information System. U.S. Geological Survey. 1952–2013. Retrieved 2014-10-13.

^ "U.S. Geological Survey National Water Summary 1985: State Summaries of Surface-Water Resources". 1987.

^ "USGS Gage #05586100 on the Illinois River at Valley City, IL" (PDF). National Water Information System. U.S. Geological Survey. 1939–2012. Retrieved 2013-11-09.

^ "USGS Gage #11447650 on the Sacramento River at Freeport, CA (Water-Data Report 2009)" (PDF). Water Resources of the United States. U.S. Geological Survey.

^ "Montana Water Resources Data 2004"., file "Mill Creek above Bassoo Creek, near Niarada to Clark Fork at Whitehorse Rapids, near Cabinet, ID" (PDF)..

^ "Estimates of monthly and annual net discharge, in cubic feet per second, of Hudson River at New York, N.Y." United States Geological Survey. October 15, 2010. Archived from the original on March 4, 2016. Retrieved December 30, 2014.

^ http://wdr.water.usgs.gov/wy2009/pdfs/03049500.2009.pdf ^{[bare URL PDF]}

^ "The Apalachicola-Chattahoochee-Flint (ACF) River National Water Quality Assessment (NAWQA) Program study".

^ "Water-Data Report 2013: 11530500 Klamath River near Klamath, CA" (PDF). U.S. Geological Survey.

^ "Water resources data for the United States, Water Year 2009; gage 02411000, Coosa River at Jordan Dam near Wetumpka, AL" (PDF). USGS.

^ United States Geological Survey; USGS 03193000 KANAWHA RIVER AT KANAWHA FALLS, WV.

^ "USGS Gage #13343000 on the Clearwater River near Lewiston". United States Geological Survey National Water Information System.