Flows of Largest U.S. Rivers -- Length, Discharge, and Drainage Area statistics


							Average
							discharge		Drainage
RANK	River	Location of mouth	Source stream		Length		at		area
BASED			(name and location)		(miles)		mouth
ON							(1,000 cu.		(1,000
LENGTH							ft. per		sq.
							second)		miles)

1	Missouri	Missouri	Red Rock Creek, MT		2,540		76.2	⁵	529
2	Mississippi	Louisiana	Mississippi River, MN	²	2,340	³	593	⁴ ⁵	1,150
3	Yukon	Alaska	McNeil River, Canada		1,980		225	⁵	328
4	St. Lawrence	Canada	North River, MN		1,900		348	⁵	396
5	Rio Grande	Mexico-Texas	Rio Grande, CO		1,900				336
6	Arkansas	Arkansas	East Fork Arkansas River, CO		1,460		41		161
7	Colorado	Mexico	Colorado River, CO		1,450		_		246
8	Atchafalaya ⁶	Louisiana	Tierra Blanca Creek, NM		1,420		58		95.1
9	Ohio	Illinois-Kentucky	Allegheny River, PA		1,310		281		203
10	Red	Louisiana	Tierra Blanca Creek, NM		1,290		56		93.2
11	Brazos	Texas	Blackwater Draw, NM		1,280		_		45.6
12	Columbia	Oregon-Washington	Columbia River, Canada		1,240		265	⁵	258
13	Snake	Washington	Snake River, WY		1,040		56.9		108
14	Platte	Nebraska	Grizzly Creek, CO		990				84.9
15	Pecos	Texas	Pecos River, NM		926				44.3
16	Canadian	Oklahoma	Canadian River, CO		906		_		46.9
17	Tennessee	Kentucky	Courthouse Creek, NC		886		68		40.9
18	Colorado (of Texas)	Texas	Colorado River, TX		862		_		42.3
19	North Canadian	Oklahoma	Corrumpa Creek, NM		800				17.6
20	Mobile	Alabama	Tickanetley Creek, GA		774		67.2		44.6
21	Kansas	Kansas	Arikaree River, CO		743				59.5
22	Kuskokwim	Alaska	South Fork Kuskokwim River, AK		724		67		48
23	Yellowstone	North Dakota	North Folk Yellowstone River, WY		692				70
24	Tanana	Alaska	Nabesna River, AK		659		41		44.5
25	Gila	Arizona	Middle Fork Gila River, NM		649				58.2
26	Porcupine	Alaska	Porcupine River, Canada		569		23		45.1
27	Susquehanna	Maryland	Hayden Creek, NY		447		38.2		27.2
28	Stikine	Alaska	Stikine River, Canada		379		56	⁵	20
29	Susitna	Alaska	Susitna River, AK		313		51		20
30	Willamette	Oregon	Middle Fork Willamette River, OR		309		37.4		11.4
31	Copper	Alaska	Copper River, AK		286		59		24.4
32	Nushagak	Alaska	Nushagak River, AK		285		36		13.4

1 From source to mouth.
2 The length from the source of the Missouri River to the MississippiRiver and thence to the Gulf of Mexico is about 3,710 miles.
3 Includes about 167,000 cubic ft. per second diverted from theMississippi into the Atchafalaya River but excludes the flow of the RedRiver.
4 Excludes the drainage areas of the Red and Atchafalaya Rivers.
5 Drainage area includes both the U.S. and Canada.
6 In east-central Louisiana, the Red River flows into the Atchafalaya River, a distributary of the Mississippi River. Data on averagedischarge, length, and drainage area include the Red River, but excludeall water diverted into the Atchafalaya from the Mississippi River. Source: U.S. Geological Survey, Largest Rivers in the United States,Open File Report 87-242, May 1990.

http://mapping.usgs.gov/

https://allcountries.org/uscensus/386_flows_of_largest_u_s_rivers.html

These tables are based on figures supplied by the United States Census Bureau, U.S. Department of Commerce and are subject to revision by the Census Bureau.

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386. Flows of Largest U.S. Rivers -- Length, Discharge, and Drainage Area