The Cannonball River
|- location||Slope County in White Lake National Wildlife Refuge|
|- elevation||2,780 ft (850 m)|
|Confluence with Missouri River in Lake Oahe|
CANNONBALL RIVER Latitude and Longitude:
|1,611 ft (491 m)|
|Length||135 mi (217 km)|
|Progression||Cannonball River → Missouri → Mississippi → Gulf of Mexico|
It rises in the Little Missouri National Grassland, in the badlands north of Amidon in northern Slope County. It flows ESE past New England, Mott, and Burt. It is joined by Cedar Creek approximately 15 mi (24 km) southwest of Shields and flows northeast, past Shields, forming the northern border of Sioux County and the Standing Rock Indian Reservation. It joins the Missouri in Lake Oahe near Cannon Ball. The cannonball concretions found in the vicinity of this river are the source of its name. 
- Ullrich, Jan, ed. (2011). New Lakota Dictionary (2nd ed.). Bloomington, IN: Lakota Language Consortium. p. 877. ISBN 978-0-9761082-9-0. LCCN 2008922508.
- U.S. Geological Survey Geographic Names Information System: Cannonball River
- Federal Writers' Project (1938). North Dakota, a Guide to the Northern Prairie State,. WPA. p. 313. ISBN 978-1-62376-033-5.
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