Waterway Systems
Great Lakes - Saint Lawrence Seaway
Port Index

The ports and harbors situated on the Great Lakes - Saint Lawrence Seaway are listed below. Ports are grouped by country and, if in the United States, by state.

Some ports may be listed twice if they are located on more than one waterway. Use the Port Map link on the left side menu to view a map of the ports on the Great Lakes - Saint Lawrence Seaway.

* indicates the port has a World Port Source review.

Port Waterway Liner
Service
Canada
Amherstburg
Port of Amherstburg
  Lake Erie    
Amherstburg
Port of Amherstburg
  Detroit River    
Baie-Comeau
Port of Baie-Comeau
  Saint Lawrence River    
Becancour
Port of Becancour *
  Saint Lawrence River    
Brockville
Brockville Harbour
  Saint Lawrence River    
Bronte
Bronte Harbor
  Lake Ontario    
Cardinal
Port of Cardinal
  Saint Lawrence River    
Chicoutimi
Port of Chicoutimi
  Saguenay River    
Clarkson
Port of Clarkson
  Lake Ontario    
Collingwood
Port of Collingwood
  Lake Huron    
Contrecoeur
Contrecoeur Harbor
  Saint Lawrence River    
Cornwall
Port of Cornwall
  Saint Lawrence River    
Forestville
Forestville Harbor
  Saint Lawrence River    
Godbout
Port of Godbout
  Saint Lawrence River    
Goderich
Port of Goderich
  Lake Huron    
Gros Cacouna
Gros Cacouna Harbor
  Saint Lawrence River    
Hamilton
Hamilton Port *
  Lake Ontario    
Havre St Pierre
Port of Havre St Pierre
  Saint Lawrence River    
Heron Bay
Heron Bay
  Lake Superior    
Kingston
Kingston Harbor
  Lake Ontario    
Kingston
Kingston Harbor
  Saint Lawrence River    
Kingsville
Port of Kingsville
  Lake Erie    
La Baie
La Baie Harbor
  Saguenay River    
Les Escoumins
Les Escoumins Harbor
  Saint Lawrence River    
Les Mechins
Les Mechins Harbor
  Saint Lawrence River    
Marathon
Port of Marathon
  Lake Superior    
Marysville
Marysville Harbor
  Lake Ontario    
Marysville
Marysville Harbor
  Saint Lawrence River    
Matane
Matane Harbor
  Saint Lawrence River    
Michipicoten
Michipicoten Harbour
  Lake Superior    
Midland
Port of Midland
  Lake Huron    
Mont Louis
Mont Louis Harbor
  Saint Lawrence River    
Montreal
Port of Montreal *
  Saint Lawrence River   Yes
Oakville
Oakville Harbor
  Lake Ontario    
Oshawa
Port of Oshawa
  Lake Ontario    
Owen Sound
Owen Sound Harbor
  Lake Huron    
Parry Sound
Parry Sound Harbour
  Lake Huron    
Penetanguishene
Port of Penetanguishene
  Lake Huron    
Pointe-au-Pic
Pointe-au-Pic Harbor
  Saint Lawrence River    
Port Cartier
Port of Port Cartier
  Saint Lawrence River    
Port Colborne
Port Colborne
  Lake Erie    
Port Colborne
Port Colborne
  Welland Canal    
Port Credit
Port Credit
  Lake Ontario    
Port Dalhousie
Port Dalhousie
  Lake Ontario    
Port Hope
Port Hope Harbour
  Lake Ontario    
Port Stanley
Port Stanley
  Lake Erie    
Port Weller
Port Weller
  Lake Ontario    
Port Weller
Port Weller
  Welland Canal    
Portneuf
Portneuf Harbor
  Saint Lawrence River    
Prescott
Port of Prescott
  Saint Lawrence River    
Quebec
Port of Quebec *
  Saint Lawrence River    
Rimouski
Rimouski Harbor
  Saint Lawrence River    
Riviere du Loup
Riviere du Loup Harbor
  Saint Lawrence River    
Saguenay
Port of Saguenay
  Saguenay River    
Sainte-Anne-des-Monts
Sainte-Anne-des-Monts Harbor
  Saint Lawrence River    
Sarnia
Port of Sarnia
  St. Clair River    
Sarnia
Port of Sarnia
  Lake Huron    
Saulte Ste Marie
Saulte Ste Marie Harbor
  St. Marys River    
Sept-Iles
Port of Sept-Iles
  Saint Lawrence River    
Sorel
Port of Sorel
  Saint Lawrence River    
Spragge
Spragge Harbor
  Lake Huron    
St. Catharines
Port of St. Catharines
  Lake Ontario    
St. Romuald
St. Romuald Harbor
  Saint Lawrence River    
Tadoussac
Tadoussac Harbor
  Saint Lawrence River    
Tadoussac
Tadoussac Harbor
  Saguenay River    
Thorold
Port of Thorold
  Welland Canal    
Thunder Bay
Thunder Bay Port Authority *
  Lake Superior    
Toronto
Port of Toronto *
  Lake Ontario    
Trois Rivieres
Port of Trois-Rivieres
  Saint Lawrence River    
Valleyfield
Port of Valleyfield
  Saint Lawrence River    
Welland
Port of Welland
  Welland Canal    
Wiarton
Wiarton Harbor
  Lake Huron    
Windsor
Port Windsor
  Detroit River    
United States
Illinois
Calumet
Calumet Harbor *
  Lake Michigan    
Chicago
DuSable Harbor *
  Lake Michigan    
Chicago
Port of Chicago *
  Lake Michigan    
Waukegan
Port of Waukegan *
  Lake Michigan    
Indiana
East Chicago
Indiana Harbor *
  Lake Michigan    
Gary
Port of Gary *
  Lake Michigan    
Portage
Port of Indiana - Burns Harbor *
  Lake Michigan    
Michigan
Algonac
Port of Algonac *
  St. Clair River    
Alpena
Port of Alpena *
  Lake Huron    
Bay City
Port of Bay City *
  Lake Huron    
Charlevoix
Port of Charlevoix
  Lake Michigan    
Cheboygan
Port of Cheboygan
  Lake Huron    
Detroit
Detroit/Wayne County Port Authority *
  Detroit River    
Escanaba
Port of Escanaba
  Lake Michigan    
Ferrysburg
Port of Ferrysburg
  Lake Michigan    
Grand Haven
Port of Grand Haven
  Lake Michigan    
Holland
Holland Harbor *
  Lake Michigan    
Ludington
Ludington Harbor *
  Lake Michigan    
Manistee
Manistee Harbor *
  Lake Michigan    
Marquette
Port of Marquette
  Lake Superior    
Menominee
Port of Menominee
  Lake Michigan    
Monroe
Port of Monroe
  Lake Erie    
Muskegon
Muskegon Harbor
  Lake Michigan    
Ontonagon
Port of Ontonagon
  Lake Superior    
Port Huron
Port of Port Huron
  Lake Huron    
Port Huron
Port of Port Huron
  St. Clair River    
Presque Isle
Presque Isle Harbor *
  Lake Huron    
Rogers City
Port of Calcite *
  Lake Huron    
Rogers City
Rogers City Marina *
  Lake Huron    
Sault Ste Marie
Port of Sault Ste Marie
  St. Marys River    
Wyandotte
Wyandotte Harbor *
  Detroit River    
Minnesota
Duluth
Port of Duluth *
  Lake Superior    
Taconite Harbor
Taconite Harbor *
  Lake Superior    
New York
Alexandria Bay
Port of Alexandria Bay
  Saint Lawrence River    
Buffalo
Port of Buffalo *
  Lake Erie    
Cape Vincent
Port of Cape Vincent *
  Saint Lawrence River    
Cape Vincent
Port of Cape Vincent *
  Lake Ontario    
Clayton
Port of Clayton *
  Saint Lawrence River    
Ogdensburg
Port of Ogdensburg *
  Saint Lawrence River    
Oswego
Port of Oswego *
  Lake Ontario    
Rochester
Port of Rochester *
  Lake Ontario    
Sodus Point
Sodus Point Harbor *
  Lake Ontario    
Ohio
Ashtabula
Port of Ashtabula *
  Lake Erie    
Cleveland
Port of Cleveland *
  Lake Erie    
Conneaut
Port of Conneaut *
  Lake Erie    
Fairport Harbor
Fairport Harbor *
  Lake Erie    
Huron
Port of Huron *
  Lake Erie    
Lorain
Port of Lorain *
  Lake Erie    
Sandusky
Port of Sandusky *
  Lake Erie    
Toledo
Port of Toledo *
  Lake Erie    
Pennsylvania
Erie
Port of Erie *
  Lake Erie    
Wisconsin
Ashland
Ashland Harbor *
  Lake Superior    
Green Bay
Port of Green Bay
  Lake Michigan    
Kenosha
Port of Kenosha *
  Lake Michigan    
Manitowoc
Manitowoc Harbor *
  Lake Michigan    
Marinette
Port of Marinette *
  Lake Michigan    
Milwaukee
Port of Milwaukee *
  Lake Michigan    
Port Washington
Port Washington Marina *
  Lake Michigan    
Racine
Port of Racine
  Lake Michigan    
Sheboygan
Port of Sheboygan *
  Lake Michigan    
Superior
Port Superior *
  Lake Superior