List of Ontario rivers

See also:

This is the list of rivers situated only in Ontario. This lists includes creekss and tributaries as well.

Hudson Bay Watershed
- Severn River
  - Beaver River
  - English River?, The Meadows
  - Nagagamisis River, Nagagamisis Lake
    - Duck Bay,
  - Obakamiga River, Rocky Narrows
  - Pike Alley
  - Fawn River
  - Usiske River
- Winisk River
- Albany River
  - Drowning River
- James Bay Watershed
  - Moose River
    - Frederick House River
    - Abitibi River
    - Mattagami River
      - Kapuskasing River
        
        , Brunswick Lake
        Doherty Creek
        Fire River
        Kabinakagami River, Horseback Rapids, The Expansion, Second Gap, Second Rapids
        The Chutes, Lilypad Bay
        Brulé Creek
        Edison Creek
        Woolrich Creek
        Schist Bay
        Whitefish Bay
        Beaver Bay
        Boot Bay
        Bear Creek
        Nameigos River
        Five Mile Creek
        Torrance Creek
        Hopkins Creek
        Remi River, Remi Lake
    - Big Island Bay
      - Forks River
        Chapleau River
      - Groundhog River
    - Missinabi River
      - Mattawitchewan River, The Chutes)
        Albany Forks
        Cameron Creek
        Oba River, Oba Lake
        Hoodoo Bay
      - Pivabiska River
  - Kesagami River
  - Kattawagami River
Atlantic Ocean Watershed
- Lake Erie Watershed
  - Grand River
    - Conestoga River
      - Speed River
  - Lake St. Clair Watershed
    - Thames River
      - Dingman Creek
      - Jeanettes Creek
      - McGregor Creek
      - Medway Creek
      - Pottersburg Creek
      - Stoney Creek
      - Waubuno Creek
- Lake Huron, Georgian Bay, Watershed (in alphabetical order)
  - Ausable River
  - Bayfield River
  - French River
    - Lake Nipissing Watershed
  - Maitland River
  - Moon River (Cottage Country)
  - St. Mary's River
  - Saugeen River
  - Spanish River
  - Vermillion River
- Lake Ontario Watershed ( in order of ascent mainly from west to east)
  - Niagara River
  - Niagara Falls
    - Welland River
      - Black Creek (Niagara)
  - Jordan Harbour Watershed
  - Red Hill Creek (Niagara)
  - Burlington Bay Watershed
    - Sulphur
  - Bronte Creek
  - Sixteen Mile Creek (Toronto)
  - Credit River
  - Humber River
    - Black Creek (Toronto)
    - Emerson Creek
    - Jersey Creek
    - Rainbow Creek (Woodbridge)
      - Robinson Creek (Toronto)
    - West Humber River
    - East Humber River
  - Etobicoke Creek
    - Heart Lake (Toronto)
  - Mimico Creek
  - Toronto Harbour
    - Don River, Toronto
      - west branch Don River
      - Taylor Creek
      - east branch Don river
        Beaver Creek (Toronto)
  - Highland Creek
  - Rouge River
  - Duffins Creek
  - Trent-Severn Waterway
    - Trent River
      - Crowe River
      - Moira River
    - Rice Lake Watershed
      - Otonabee River
      - Lake Chemong Watershed
    - Lake Simcoe Watershed
      - Holland River
    - Severn River
  - Cataraqui River
- Lake Superior Watershed
  - Pigeon River
    - Arrow River
    - Pine River
  - Lake of the Woods Watershed
  - Rainy River
  - Kaministiquia River
    - Mission River
    - McKellar River
    - Whitefish River
    - Shebandowan River
  - Aguasabon River, Long Lake
    - Kenogami River
      - Pagwa River
      - Flint River, Flint Lake
        Holles Creek
      - Burrows River, Burrows Lake
        Murky Creek
        , Cotoneaster Lake
      - Kemogamisis River
      - Isis Creek
      - ,
        Pout River
  - Neebing River
  - McIntyre River
  - Current River
  - Nipigon River
    - Lake Nipigon Watershed
      - Ogoki River
      - Kopka River
      - Ombabika River
  - Steel River
  - Pic River
  - White River
  - Pukaskwa River
  - Magpie River
  - Agawa River
  - Montreal River
  - Batchawana River
- Ottawa River Watershed
  - Ottawa River
    - Riguad River
      - East Riguad River
    - South Nation River
      - Castor River
        North Castor River
        Middle Castor River
        South Castor River
        East Castor River
      - Little Castor River
      - North Branch South Nation River
      - South Branch South Nation River
    - Rideau River
      - Jock River
      - Tay River
    - Carp River
    - Mississippi River
      - Indian River
      - Clyde River
        Little Clyde River
    - Madawaska River
      - York River
        Little Mississippi River
      - South Madawaska River
        Galipo River
        Crossbar River
      - North Madawaska River
    - Bonnechere River
      - Sherwood River
      - Pine River
      - Aylen River
    - Muskrat River
      - Indian River
    - Petawawa River
      - Barron River
      - Crow River
      - North River
      - Little Madawaska River
      - Nipissing River
      - Tim River
    - Chalk River
    - Mattawa River
      - Amable du Fond River
      - Kaibuskong River
      - Mattawa River
    - Montreal River
- Saint Lawrence River Watershed
  - Saint Lawrence River
  - Raisin River