List of Longest Rivers in The United States By State - Wisconsin

Wisconsin

1. Mississippi River – 2,320 miles (3,730 km)
2. Wisconsin River – 430 miles (690 km)
3. Rock River – 299 miles (481 km)
4. Wolf River – 225 miles (362 km)
5. Oconto River – 209 miles (336 km)
6. Fox River (Green Bay tributary) – 200 miles (322 km)
7. Fox River (Illinois River tributary) – 199 miles (320 km)
8. Pecatonica River - 194 miles (312 km)
9. Saint Louis River – 192 miles (309 km)
10. Black River – 190 miles (310 km)

• The Wisconsin River is the longest river that is entirely within Wisconsin, though its source is a lake that is partially in the Upper Peninsula of Michigan.

See also List of rivers of Wisconsin.