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United States Rivers

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Merrimack River

StatesMassachusetts (47 mi), New Hampshire (67 mi)
Length116.8 miles
Watershed Length*1,116 miles
MouthAtlantic Ocean


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Name Distance
from Mouth
Beaver Brook402828
Cohas Brook681717
Concord River3916107
Contoocook River10174170
Little River191313
Nashua River5543113
Pemigewasset River11766247
Piscataquog River713768
Powwow River72626
Salmon Brook531212
Shawsheen River282727
Soucook River862525
Souhegan River623447
Spicket River281414
Suncook River833851
Winnipesaukee River1172134
Watercourse ‐ ‐ ‐ Watershed

* Note: Watershed is mostly rivers/streams 15+ miles in length.

Data from United States Geological Survey