Little River (Merrimack River tributary)

Little River
Location
CountryUnited States
StatesNew Hampshire, Massachusetts
CountiesRockingham, NH, Essex, MA
TownsKingston, NH, Plaistow, NH, Haverhill, MA
Physical characteristics
Source 
  locationKingston, NH
  coordinates42°52′37″N 71°5′20″W / 42.87694°N 71.08889°W / 42.87694; -71.08889
  elevation130 ft (40 m)
MouthMerrimack River
  location
Haverhill, MA
  coordinates
42°46′21″N 71°4′58″W / 42.77250°N 71.08278°W / 42.77250; -71.08278
  elevation
0 ft (0 m)
Length12.9 mi (20.8 km)
Basin features
Tributaries 
  leftSeaver Brook, Snows Brook
  rightKelly Brook, Bryant Brook, Foote Brook, Fishin Brook

The Little River is a 12.9-mile-long (20.8 km) river in New Hampshire and Massachusetts in the United States. It is a tributary of the Merrimack River, part of the Gulf of Maine watershed.

The Little River rises in Kingston, New Hampshire, flows south through Plaistow, and enters the city of Haverhill, Massachusetts, where it joins the Merrimack River. Most of the Little River's course is marked by suburban and urban development.