Salmon Falls River
Salmon Falls River c. 1903
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Location
Country	United States
States	New Hampshire, Maine
Counties	Carroll, NH, Strafford, NH, York, ME
Towns and cities	Wakefield, NH, Acton, ME, Milton, NH, Lebanon, ME, Rochester, NH, Berwick, ME, Somersworth, NH, Rollinsford, NH, South Berwick, ME, Dover, NH, Eliot, ME
Physical characteristics
Source	Horn Pond
• location	Wakefield, NH/Acton, ME
• coordinates	43°33′10″N 70°57′13″W / 43.55278°N 70.95361°W / 43.55278; -70.95361
• elevation	560 ft (170 m)
Mouth	Piscataqua River
• location	Dover, NH/Eliot, ME
• coordinates	43°10′33″N 70°49′26″W / 43.17583°N 70.82389°W / 43.17583; -70.82389
• elevation	0 ft (0 m)
Length	38 mi (61 km)
Basin features
Tributaries
• left	Little River, Great Works River
• right	Branch River

The Salmon Falls River is a tributary of the Piscataqua River in the U.S. states of Maine and New Hampshire. It rises at Great East Lake, Newichawannock Canal, and Horn Pond and flows south-southeast for approximately 38 miles (61 km), forming the border between York County, Maine, and Strafford County, New Hampshire.^[1]

The Salmon Falls River joins the Cochecho River near Dover, New Hampshire, to form the Piscataqua River.^[2]

It provides hydroelectric power at the New Hampshire towns of Milton, North Rochester, East Rochester, New Hampshire, Somersworth, and Rollinsford, and in Maine at Berwick and South Berwick. The final three miles of the river, from South Berwick to the Piscataqua, are tidal.

Local Abenaki Indians called the river Newichawannock (New-ik-a-WAN-nok), meaning "river with many falls". See Newichawannock Canal

Salmon Falls River between South Berwick and Rollinsford

• List of rivers of Maine
• List of rivers of New Hampshire

• History of the Newichawannock – Salmon Falls River