Rock River may refer to:

• the Rock River, a tributary of the Mississippi River in Wisconsin and Illinois in the United States
• the Rock River, a tributary of the Big Sioux River in Minnesota and Iowa in the United States
• any of three Rock Rivers in Michigan in the United States
• Rock River Township, Michigan
• the village of Rock River, Wyoming
• The firearm company Rock River Arms.

The Rock River is a tributary of the Mississippi River, approximately 285 miles (459 km) long, in the U.S. states of Wisconsin and Illinois. ... Length 6,270 km Elevation of the source 450 m Average discharge Saint Louis¹: 5,500 m³/s Vicksburg²: 16,800 m³/s Baton Rouge³: 12,800 m³/s Area watershed 2,980,000 km² Origin Lake Itasca Mouth Gulf of Mexico Basin countries United States (98. ... One of the periods of glaciation was also termed the Wisconsin glaciation. ... State nickname: Land of Lincoln, The Prairie State Other U.S. States Capital Springfield Largest city Chicago Governor Rod Blagojevich Official languages English Area 149,998 km² (25th)  - Land 143,968 km²  - Water 6,030 km² (4. ... The Big Sioux River is a tributary of the Missouri River in the upper Midwest of the United States. ... State nickname: North Star State Other U.S. States Capital Saint Paul Largest city Minneapolis Governor Tim Pawlenty Official languages None Area 225,365 km² (12th)  - Land 206,375 km²  - Water 18,990 km² (8. ... State nickname: The Hawkeye State Other U.S. States Capital Des Moines Largest city Des Moines Governor Thomas Vilsack Official languages English Area 145,743 km² (26th)  - Land 144,701 km²  - Water 1,042 km² (0. ... State nickname: Wolverine State or Great Lakes State Other U.S. States Capital Lansing Largest city Detroit Governor Jennifer Granholm Official languages English Area 250,941 km² (11th)  - Land 147,255 km²  - Water 103,687 km² (41. ... Rock River Township is a township located in Alger County, Michigan. ... Rock River is a town located in Albany County, Wyoming. ...

See also

• Little Rock River