Discharge of the largest rivers in the U.S.

This statistic shows the average discharge at mouth of the largest rivers in the U.S. in 2005. The Missouri river has an average discharge of 76,2 thousand cubic feet per second at its mouth.

Average discharge at mouth of the largest rivers in the U.S. in 2005 (in 1,000 cubic feet per second)

Characteristic	Discharge in thousand cubic feet per second
Mississippi (Louisiana)*	593
St Lawrence (Canada)	348
Ohio (Illinois-Kentucky)	281
Columbia (Oregon-Washington)	265
Yukon (Alaska)	225
Missouri (Missouri)	76.2
Tennessee (Kentucky)	68
Mobile (Alabama)	67.2
Kuskokwim (Alaska)	67
Copper (Alaska)	59
Atchafalaya (Louisiana)**	58
Snake (Washington)	56.9
Stikine (Alaska)	56
Red River (Louisiana)**	56
Susitna (Alaska)	51
Arkansas (Arkansas)	41
Tanana (Alaska)	41
Susquehanna (Maryland)	38.2
Willamette (Oregon)	37.4
Nushagak (Alaska)	36
Procupine (Alaska)	23

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Release date

September 2011

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Region

United States

Survey time period

September 2005

Supplementary notes

* Includes about 167,000 cubic ft. per second diverted from the Mississippi into the Atchafalaya River but excludes the flow of the Red River.
** In east-central Louisiana, the Red River flows into the Atchafalaya River, a distributary of the Mississippi River. Data on average discharge, length, and drainage area include the Red River, but exclude all water diverted into the Atchafalaya from the Mississippi River.

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