About

Steamboat Island is nestled within the Thousand Islands region, straddling the US-Canada border. This small yet notable island is part of the Manhattan Group, lying north-northeast of the more prominently named Manhattan Island. Its coordinates, 442126N 0755453W, place it in the scenic waters of the St. Lawrence River, an area known for its picturesque natural beauty and rich history.

Located in Jefferson County, New York, Steamboat Island falls under the jurisdiction of the village of Alexandria Bay. This charming village is a popular spot for tourists exploring the Thousand Islands, offering a blend of natural allure and quaint local culture. Over the years, Steamboat Island has been known by other names, including “Plantagenet” and “St. John’s,” reflecting a diverse historical tapestry.

Island or Feature Name
Steamboat Island

Nationality
US

Centroid Lat/Long
442126N 0755453W

Two-Minute Box
44^22′ x 75^54′

Location and description
In or near The Manhattan Group,north-northeast of Manhattan Island

Former, informal, or alternate names
“Plantagenet”, “St. John’s”

Municipality
Alexandria Bay (V)

County
Jefferson

Province / State
NY

Ports?

Book refs

1000islands.co ID #
1157

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Data source.