New Brunswick receives precipitation year-round, which feeds numerous streams and rivers. There are two main discharge basins: the Gulf of Saint Lawrence to the east and north and the Bay of Fundy to the south. The major rivers are the St. John River (Wolastoq) and the Miramichi.
>| Official Name | Type 1 | Type 2 | Tributary of/Watercourse | Start County | End or 2nd County | Deepest Point/Drop | Watershed area | Width | Notes | | Bouctouche River | River | Bouctouche Bay | Kent County | Kent County |
| Bouctouche Bay | Bay | Bouctouche Harbour | Kent County | Kent County |
| Bouctouche Harbour | Harbour | Northumberland Strait | Kent County | Kent County |
| Caraquet Bay | Bay | Chaleur Bay | Gloucester County | Gloucester County |
| Caraquet River | River | Caraquet Bay | Gloucester County | Gloucester County |
| Chaleur Bay | Bay | Gulf of Saint Lawrence | Gloucester County | Restigouche County |
| Chockpish River | River | Northumberland Strait | Kent County | Kent County |
| Cocagne River | River | Cocagne Harbour | Kent County | Westmorland County |
| Cocagne Harbour | Harbour | Northumberland Strait | Kent County | Kent County |
| Gounamitz River | River | Little Main Restigouche River | Madawaska County | Victoria County |
| North Branch Gounamitz River | River | Gounamitz River | Restigouche County | Madawaska County |
| West Branch Gounamitz River | River | Gounamitz River | Restigouche County | Madawaska County |
| Green River | River | First Lake | Madawaska County | Madawaska County |
| Jacquet River | River | Chaleur Bay | Restigouche County | Restigouche County |
| Kouchibouguac Bay | Bay | Northumberland Strait | Kent County | Kent County |
| Kouchibouguac River | River | Kouchibouguac Bay | Kent County | Kent County |
| Kouchibouguacis River | River | Kouchibouguac Bay | Kent County | Kent County |
| Little Bouctouche River | River | Bouctouche Bay | Kent County | Kent County |
| Mascogne River | River | Bouctouche Harbour | Kent County | Kent County |
| Miramichi Bay | Bay | Gulf of Saint Lawrence | Northumberland County | Northumberland County |
| Nerepis River | River | Saint John River | Kings County | Sunbury County |
| Miramichi River | River | Miramichi Bay | Northumberland County | Northumberland County |
| Barnaby River | River | Miramichi River | Northumberland County | Northumberland County |
| Bartibogue River | River | Miramichi River | Northumberland County | Northumberland County |
| Northwest Miramichi River | River | Miramichi River | Northumberland County | Northumberland County |
| Rimouski River | River | St. Lawrence River | Restigouche County | MRC Rimouski-Neigette, Quebec | 1635 | Only 2.8 km of the river flows in New Brunswick |
| Sevogle River | River | Northwest Miramichi River | Northumberland County | Northumberland County |
| Southwest Miramichi River | River | Northwest Miramichi River | Northumberland County | Northumberland County |
| Taxis River | River | Southwest Miramichi River | Northumberland County | Northumberland County |
| Little Southwest Miramichi River | River | Southwest Miramichi River | Northumberland County | Northumberland County |
| North Pole Stream | River | Stream | Little Southwest Miramichi River | Restigouche County | Restigouche County |
| Bartholomew River | River | Southwest Miramichi River | Northumberland County | Northumberland County |
| Cains River | River | Southwest Miramichi River | Northumberland County | Northumberland County |
| Renous River | River | Southwest Miramichi River | Northumberland County | Northumberland County |
| North Renous River | River | Renous River | Northumberland County | Northumberland County |
| Dungarvon River | River | Renous River | Northumberland County | Northumberland County |
| Napan River | River | Miramichi River | Northumberland County | Northumberland County |
| Oyster River | River | Miramichi River | Northumberland County | Northumberland County |
| Tabusintac River | River | Miramichi River | Northumberland County | Northumberland County |
| Nepisiguit River | River | Chaleur Bay | Gloucester County | Restigouche County |
| Serpentine River | River | Nepisiguit River | Restigouche County | Restigouche County |
| Pokemouche River | River | Inkerman Lake | Restigouche County | Restigouche County |
| South Branch Pokemouche River | River | Pokemouche River | Gloucester County | Gloucester County |
| Cowans Creek | River | Pokemouche River | Gloucester County | Gloucester County |
| Waugh River | River | Pokemouche River | Gloucester County | Gloucester County |
| Richibucto River | River | Richibucto Harbour | Kent County | Kent County |
| Richibucto Harbour | Harbour | Gulf of Saint Lawrence | Kent County | Kent County |
| Molus River | River | Richibucto River | Kent County | Kent County |
| Bass River | River | Richibucto River | Kent County | Kent County |
| Coal Branch River | River | Richibucto River | Kent County | Kent County |
| St. Nicholas River | River | Richibucto River | Kent County | Kent County |
| East Branch St. Nicholas River | River | St. Nicholas River | Kent County | Kent County |
| South Branch St. Nicholas River | River | St. Nicholas River | Kent County | Kent County |
| West Branch St. Nicholas River | River | St. Nicholas River | Kent County | Kent County |
| St. Charles River | River | Richibucto River | Kent County | Kent County |
| Restigouche River | River | Chaleur Bay | Restigouche County | Restigouche County |
| Kedgwick River | River | Restigouche River | Restigouche County | Restigouche County |
| Belle Kedgwick River | River | Kedgwick River | Restigouche County | Restigouche County |
| South Branch Kedgwick River | River | Kedgwick River | Restigouche County | Restigouche County |
| Patapedia River | River | Restigouche River | Restigouche County | Restigouche County |
| Upsalquitch River | River | Restigouche River | Restigouche County | Restigouche County |
| Northwest Upsalquitch River | River | Upsalquitch River | Restigouche County | Restigouche County |
| Southeast Upsalquitch River | River | Upsalquitch River | Restigouche County | Restigouche County |
| Little Southeast Upsalquitch River | River | Southeast Upsalquitch River | Restigouche County | Restigouche County |
| Rivière du Nord | River | Caraquet Bay | Gloucester County | Restigouche County |
| Saint-Charles River | River | Richibucto Harbour | Kent County | Kent County |
| Scoudouc River | River | Shediac Harbour | Westmorland County | Westmorland County |
| Shediac Harbour | Harbour | Shediac Bay | Westmorland County | Westmorland County |
| Shediac Bay | Bay | Northumberland Strait | Westmorland County | Westmorland County |
| Shediac River | River | Shediac Bay | Westmorland County | Westmorland County |
| Tracadie River | River | Shediac River | Westmorland County | Westmorland County |
| Calhoun Brook | River | Brook | Shediac River | Westmorland County | Westmorland County |
| McQuade Brook | River | Brook | Shediac River | Westmorland County | Westmorland County |
| Batemans Brook | River | Brook | Shediac River | Westmorland County | Westmorland County |
| Big Salmon River | River | Bay of Fundy | Saint John County | Kings County |
| Pokiok Falls[1] | Waterfall | Cascade | Pokiok Stream | York County | York County | 2|m|ft|abbr=on}} |
| Pokiok Stream | River | Stream | Mactaquac Lake | York County | York County |
| Mactaquac Lake | Lake | Saint John River | York County | York County |
| Reversing Falls | Waterfall | Rapids | Saint John River | Saint John County | Saint John County |
| Irish River | River | Bay of Fundy | Saint John County | Saint John County |
| Indian Falls | Waterfall | Rapids | Nepisiguit River | Northumberland County | Northumberland County |
| Magaguadavic River | River | Bay of Fundy | York County | Charlotte County |
| Bathurst Harbour | Harbour | Chaleur Bay | Gloucester County | Gloucester County |
| Pabineau Falls | Waterfall | Cataract | Nepisiguit River | Gloucester County | Gloucester County | 15|m|ft|abbr=on}} |
| Jackson Falls | Waterfall | Cataract | Meduxnekeag River | Gloucester County | Gloucester County | 15|m|ft|abbr=on}} |
| Memramcook River | River | Shepody Bay | Albert County | Westmorland County |
| Missaguash River | River | Isthmus of Chignecto | Westmorland County | Cumberland County |
| Musquash River | River | Bay of Fundy | Saint John County | Saint John County |
| Petitcodiac River | River | Shepody Bay | Albert County | Westmorland County |
| North River | River | Petitcodiac River | Westmorland County | Westmorland County |
| Anagance River | River | Petitcodiac River | Westmorland County | Kings County |
| Pollett River | River | Petitcodiac River | Westmorland County | Kings County |
| Little River | River | Petitcodiac River | Westmorland County | Albert County |
| Humphrey Brook | River | Brook | Petitcodiac River | Westmorland County | Westmorland County |
| Point Wolfe River | River | Bay of Fundy | Albert County | Kings County |
| Shepody Bay | Bay | Bay of Fundy | Albert County | Westmorland County |
| Shepody River | River | Shepody Bay | Albert County | Albert County |
| Saint Croix River | River | St. Andrews Harbour | Charlotte County | York County |
| Passamaquoddy Bay | Bay | L'Etete Passage | Charlotte County | Charlotte County |
| St. Andrews Harbour | Harbour | Passamaquoddy Bay | Charlotte County | York County |
| Western Passage | Inlet | Passamaquoddy Bay | Charlotte County | Charlotte County |
| Saint John River | River | Saint John Harbour | Saint John County | Madawaska County |
| Aroostook River | River | Saint John River | Victoria County | Victoria County |
| Becaguimec Stream | River | Stream | Saint John River | Carleton County | Carleton County |
| Black River | River | Bay du Vin | Northumberland County | Northumberland County |
| Big Presque Isle Stream | River | Stream | Saint John River | Carleton County | Carleton County |
| Canaan River | River | Washademoak Lake | Kent County | Northumberland County |
| Eel River | River | Saint John River | York County | York County |
| Eel River | River | Eel Bay | Restigouche County | Restigouche County |
| Eel Bay | Bay | Chaleur Bay | Restigouche County | Restigouche County |
| Grand River | River | Saint John River | Victoria County | Madawaska County |
| Rivière Verte | River | Saint John River | Madawaska County | Madawaska County |
| Iroquois River | River | Saint John River | Madawaska County | Madawaska County |
| Little Iroquois River | River | Iroquois River | Madawaska County | Madawaska County |
| Jemseg River | River | Saint John River | Queens County | Queens County |
| Jonathan Creek | River | Petitcodiac River | Albert County | Westmorland County |
| Kennebecasis River | River | Saint John River | Albert County | Saint John County |
| Hammond River | River | Kennebecasis River | Kings County | Kings County |
| Quiddy River | River | Kennebecasis River | Kings County | Kings County |
| Keswick River | River | Kennebecasis River | York County | York County |
| Madawaska River | River | Saint John River | Madawaska County | Témiscouata County |
| Meduxnekeag River | River | Saint John River | Carleton County | Aroostook County |
| North Branch Meduxnekeag River | River | Meduxnekeag River | Carleton County | Aroostook County |
| Nackawic Stream | River | Stream | Saint John River | York County | York County |
| Nashwaak River | River | Saint John River | York County | Sunbury County |
| Tay River | River | Nashwaak River | York County | Sunbury County |
| Nashwaaksis Stream | River | Stream | Saint John River | York County | Sunbury County |
| Bay of Fundy | Bay | Gulf of Maine | Saint John County | Charlotte County |
| Oromocto River | River | Saint John River | Saint John County | Charlotte County |
| Rusagonis Stream | River | Stream | Oromocto River | Saint John County | Charlotte County |
| River De Chute | River | Saint John River | Carleton County | Victoria County |
| Saint Francis River | River | Saint John River | Carleton County | Victoria County |
| Shogomoc Stream | River | Saint John River | Carleton County | Victoria County |
| Tobique River | River | Saint John River | Carleton County | Victoria County |
| Gulquac River | River | Tobique River | Carleton County | Victoria County |
| Little Tobique River | River | Tobique River | Carleton County | Victoria County |
| Serpentine River | River | Tobique River | Carleton County | Victoria County |
| Wapske River | River | Tobique River | Carleton County | Victoria County |
| Salmon River | River | Bay of Fundy | Albert County | Victoria County |
| Upper Salmon River | River | Bay of Fundy | Albert County | Victoria County |
| Forty-Five River | River | Upper Salmon River | Albert County | Victoria County |
| Broad River | River | Upper Salmon River | Albert County | Victoria County |
| Tantramar River | River | Bay of Fundy | Albert County | Victoria County |
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{{clear}}1. ^{{cite web|last=Guitard |first=Nicholas | title =Hamilton Waterfalls of New Brunswick|url=http://www.waterfallsnewbrunswick.ca/| accessdate = 2008-11-10}}