List of U.S. rivers by discharge

This is a list of rivers in the 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.

River	Length (km)	Length (miles)	Average discharge (cfs)	Outflow
Mississippi River	3,730	2,320	593,000	Gulf of Mexico
Ohio River	1,575	979	281,500	Mississippi River
Saint Lawrence River	965	600	348,000 (275,000 at U.S.-Canada boundary)	Gulf of Saint Lawrence
Columbia River	2,000	1,243	273,000	Pacific Ocean
Yukon River	3,185	1,980	227,000	Bering Sea
Atchafalaya River	220	137	225,000	Gulf of Mexico
Niagara River	58	36	204,700	Lake Ontario
Detroit River	51	32	188,000	Lake Erie
St. Clair River	63	39	183,000	Lake St. Clair
Missouri River	3,767	2,341	86,300	Mississippi River
St. Marys River	120	75	75,000	Lake Huron-Lake Michigan
Tennessee River	1,049	652	68,000	Ohio River
Mobile River	72	45	67,000	Gulf of Mexico
Kuskokwim River	1,130	702	67,000	Bering Sea
Red River	2,190	1,360	58,000	Atchafalaya River
Copper River	470	290	57,400	Gulf of Alaska
Snake River	1,674	1,040	55,000	Columbia River
Stikine River	610	379	56,000	Pacific Ocean
Susitna River	504	313	51,000	Gulf of Alaska
Arkansas River	2,322	1,443	44,500	Mississippi River
Tanana River	940	584	41,800	Yukon River
Susquehanna River	747	464	38,200	Chesapeake Bay
Willamette River	301	187	37,400	Columbia River
Wabash River	810	503	34,500	Ohio River
Alabama River	512	318	32,500	Mobile River
Nushagak River	450	280	32,000?	Bering Sea
Alsek River	386	240	31,000	Gulf of Alaska
Cumberland River	1,120	696	30,000?	Ohio River
Black River-Ouachita River	974	605	29,800	Red River
White River	1,159	720	29,500	Mississippi River
Pend Oreille River	210	130	27,000	Columbia River
Tombigbee River	320	200	26,300	Mobile River
Apalachicola River	180	112	25,000	Gulf of Mexico
Koyukuk River	684	425	25,000?	Yukon River
Illinois River	439	273	24,000	Mississippi River
Sacramento River	719	447	23,500	Pacific Ocean
Porcupine River	916	569	23,000	Yukon River
Colorado River	2,330	1,450	22,000	Gulf of California
Clark Fork River	500	310	21,900	Pend Oreille River
Yentna River	121	75	21,000?	Susitna River
Chitina River	180	112	20,000?	Copper River
Allegheny River	523	320	19,900	Ohio River
Kvichak River	80	50	17,900	Bering Sea
Connecticut River	655	407	17,500	Atlantic Ocean
Klamath River	423	263	17,300	Pacific Ocean
Santee River	230	143	17,000(approx.)	Atlantic Ocean
Skagit River	240	150	16,500	Pacific Ocean
Kootenai (Kootenay) River	781	485	27,600 (approx. 16,000? at U.S.-Canada boundary)	Columbia River
Hudson River	507	315	16,000(approx.)	Atlantic Ocean
Coosa River	450	280	16,000	Alabama River
Kanawha River	156	97	16,000	Ohio River
Clearwater River	120	75	15,300	Snake River
Kobuk River	451	280	15,300	Bering Sea
Pee Dee River	373	232	15,000?	Atlantic Ocean

See also

• List of longest rivers in the United States by state
• List of rivers by discharge