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

Massachusetts

1. Connecticut River – 407 miles (655 km)
2. Housatonic River – 139 miles (224 km)
3. Merrimack River – 117 miles (188 km)
4. Charles River – 80 miles (130 km)
5. Deerfield River – 76 miles (122 km)
6. Hoosic River – 76 miles (122 km)
7. Quinebaug River – 69 miles (111 km)
8. Westfield River – 61 miles (98 km)
9. Millers River – 52 miles (84 km)
10. Blackstone River - 48 miles (77 km)

See also List of rivers of Massachusetts.