Here’s a list of the top 15 largest rivers in the United States, ranked by length:
1. Missouri River
Length: 2,341 miles
Source: Rocky Mountains (Montana)
Mouth: Mississippi River (Missouri)
2. Mississippi River
Length: 2,340 miles
Source: Lake Itasca (Minnesota)
Mouth: Gulf of Mexico (Louisiana)
3. Yukon River
Length: 1,982 miles
Source: Atlin Lake (British Columbia, Canada)
Mouth: Bering Sea (Alaska)
4. Rio Grande
Length: 1,896 miles
Source: San Juan Mountains (Colorado)
Mouth: Gulf of Mexico (Texas)
5. Arkansas River
Length: 1,469 miles
Source: Rocky Mountains (Colorado)
Mouth: Mississippi River (Arkansas)
6. Colorado River
Length: 1,450 miles
Source: Rocky Mountains (Colorado)
Mouth: Gulf of California (Mexico)
7. Red River
Length: 1,360 miles
Source: Harmon County (Oklahoma)
Mouth: Atchafalaya River (Louisiana)
8. Columbia River
Length: 1,243 miles
Source: Columbia Lake (British Columbia, Canada)
Mouth: Pacific Ocean (Oregon/Washington)
9. Snake River
Length: 1,078 miles
Source: Yellowstone National Park (Wyoming)
Mouth: Columbia River (Washington)
10. Ohio River
Length: 981 miles
Source: Pittsburgh (Pennsylvania)
Mouth: Mississippi River (Illinois)
11. Tennessee River
Length: 652 miles
Source: Knoxville (Tennessee)
Mouth: Ohio River (Kentucky)
12. Platte River
Length: 649 miles
Source: Rocky Mountains (Colorado/Wyoming)
Mouth: Missouri River (Nebraska)
13. Pecos River
Length: 926 miles
Source: Sangre de Cristo Mountains (New Mexico)
Mouth: Rio Grande (Texas)
14. Kansas River
Length: 148 miles
Source: Junction City (Kansas)
Mouth: Missouri River (Kansas City)
15. Susquehanna River
Length: 444 miles
Source: Otsego Lake (New York)
Mouth: Chesapeake Bay (Maryland)
This list ranks rivers by their total length, including stretches that extend into neighboring countries when applicable.
