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Archipelago

    St. Lawrence RiverUnited States and Canada

    44°20′N 76°00′W

    Thousand Islands

    The Thousand Islands constitute a North American archipelago of 1,864 islands that straddles the Canada–US border in the Saint Lawrence River as it emerges from the northeast corner of Lake Ontario. They stretch for about 50 miles (80 km) downstream from Kingston, Ontario. S. islands in the state of New York.

    Aerial view of w:Boldt Castle and some of the w:Thousand Islands in the w:Saint Lawrence River.
    Aerial view of w:Boldt Castle and some of the w:Thousand Islands in the w:Saint Lawrence River.

    Teresa Mitchell; levels adjustment by Howcheng. / Public domain

    Chart

    950 landforms

    Overview

    The Thousand Islands constitute a North American archipelago of 1,864 islands that straddles the Canada–US border in the Saint Lawrence River as it emerges from the northeast corner of Lake Ontario. They stretch for about 50 miles (80 km) downstream from Kingston, Ontario. The Canadian islands are in the province of Ontario and the U.S. islands in the state of New York. The islands range in size from over 40 square miles (100 km2) to smaller islands occupied by a single residence, or uninhabited outcroppings of rocks. To count as one of the Thousand Islands, emergent land within the river channel must have at least one square foot (0.093 m2) of land above water level year-round, and support at least two living trees.

    From Wikipedia, CC BY-SA 4.0

    Census, cataloged

    • Major islands4
    • Minor islands35
    • Islets502
    • Rocks & skerries409

    Major islands

    4
    • Wolfe Island

      Wolfe Island

      Area
      132 km²
      High point
      112 m

      Wolfe Island is the largest of the Thousand Islands, and is located at the entrance to the St. Lawrence River in Lake Ontario. It is a piece of land situated between Kingston, Ontario and Cape Vincent, New York. Wolfe Island is included in Frontenac County and the Township of Frontenac Islands.

    • Howe Island

      Howe Island

      Area
      35.7 km²
      High point
      128 m

      Howe Island is an island located in Lake Ontario east of Kingston in Frontenac County, Ontario, Canada. It is part of the Thousand Islands chain. Together with Wolfe Island and Simcoe Island, Howe Island is part of the township of Frontenac Islands, created through municipal amalgamation in 1998.

    • Wellesley Island

      Wellesley Island

      Area
      33.1 km²
      High point
      127 m

      Wellesley Island is an island in the St. Lawrence River in Jefferson County, New York. The island is partially in the Town of Orleans and partially in the Town of Alexandria.

    • Grindstone Island

      Area
      23.3 km²
      High point
      133 m

      Grindstone Island is the fourth largest of the Thousand Islands in the St. Lawrence River and the second largest of the American islands in the St. Lawrence. The island lies near Lake Ontario and is part of the United States. In particular, the island is part of the Town of Clayton in Jefferson County, New York.

    Minor islands

    35

    Rocks & skerries

    409

    On the chart above, at its closest zooms.

    Listing 39 of 950; the rest are on the chart.

    Figures

    Comparative heights

    Sea level50 m100 m150 m133 mGrindstone128 mHowe128 mHill127 mWellesley124 mGrenadier119 mCarleton117 mTar114 mPicton112 mWolfe111 mMurray110 mBluff109 mOak108 mStave108 mClub
    High points by island, metres above sea level.

    Islands by area

    0.11101001,000Wolfe: 132 km²WolfeHowe: 35.7 km²HoweWellesley: 33.1 km²WellesleyGrindstone: 23.3 km²GrindstoneSimcoe: 5.7 km²SimcoeHill: 5.6 km²HillCarleton: 5.5 km²CarletonGrenadier: 5.2 km²GrenadierOak: 1.5 km²OakTar: 1 km²TarPicton: 0.83 km²PictonMurray: 0.71 km²MurrayStave: 0.71 km²StaveClub: 0.62 km²ClubAsh: 0.49 km²AshRound: 0.45 km²RoundHay: 0.41 km²HayThwartway: 0.38 km²ThwartwayHorseshoe: 0.37 km²HorseshoeBostwick: 0.36 km²BostwickHickory: 0.34 km²HickoryGarden: 0.3 km²GardenBluff: 0.25 km²BluffBayfield: 0.24 km²BayfieldDownie: 0.24 km²DownieWallace: 0.22 km²WallaceDeer: 0.19 km²DeerGrenell: 0.16 km²GrenellSugar: 0.16 km²SugarMcDonald: 0.16 km²McDonaldTreasure: 0.15 km²TreasureLindsay: 0.14 km²LindsayPrince Regent: 0.12 km²Prince RegentHickey: 0.12 km²HickeyShoe: 0.11 km²ShoeAtlantis: 0.1 km²AtlantisFairyland: 0.1 km²FairylandTremont Park: 0.1 km²Tremont ParkGeorgina: 0.1 km²Georgina
    km², log scale
    Wolfe Island132 km²
    Howe Island35.7 km²
    Wellesley Island33.1 km²
    Grindstone Island23.3 km²
    Simcoe Island5.7 km²
    Hill Island5.6 km²
    Carleton Island5.5 km²
    Grenadier Island5.2 km²
    Oak Island1.5 km²
    Tar Island1 km²
    Picton Island0.83 km²
    Murray Isle0.71 km²
    Stave Island0.71 km²
    Club Island0.62 km²
    Ash Island0.49 km²
    Round Island0.45 km²
    Hay Island0.41 km²
    Thwartway Island0.38 km²
    Horseshoe Island0.37 km²
    Bostwick Island0.36 km²
    Hickory Island0.34 km²
    Garden Island0.3 km²
    Bluff Island0.25 km²
    Bayfield Island0.24 km²
    Downie Island0.24 km²
    Wallace Island0.22 km²
    Deer Island0.19 km²
    Grenell Island0.16 km²
    Sugar Island0.16 km²
    McDonald Island0.16 km²
    Treasure Island0.15 km²
    Lindsay Island0.14 km²
    Prince Regent Island0.12 km²
    Hickey Island0.12 km²
    Shoe Island0.11 km²
    Atlantis Island0.1 km²
    Fairyland Island0.1 km²
    Tremont Park Island0.1 km²
    Georgina Island0.1 km²

    Groups within

    7

    Sources

    Facts

    • Geometry, areas and high points: OpenStreetMap contributors (ODbL), Copernicus GLO-30, via Talus.
    • Wikidata
    • Talus
    • Wikipedia

    Photographs