About

O’Neil or O’Neill Island graces the Thousand Islands region along the Canada-US border, nestled within the jurisdiction of Leeds and the Thousand Islands municipality in Ontario. This Canadian island is pinpointed at a latitude of 44° 24′ 30″ N and a longitude of 75° 53′ 42″ W, firmly placing it in the scenic waters of the St. Lawrence River. Its location is notably downriver to the northwest of Van Buren Island and east of Cook Point on the Canadian mainland.

Known by several names over time, such as “Bluff,” “Flat,” and “Hog,” O’Neil or O’Neill Island has a rich tapestry of informal history reflecting its varied landscape and potentially diverse use. The island is part of the larger Leeds and Grenville County, an area characterized by its lush natural beauty and historical significance within Ontario. Though specific details about the island’s size or features are limited, its placement among the Thousand Islands marks it as part of a region known for its stunning vistas and recreational opportunities.

Island or Feature Name
O’Neil or O’Neill Island

Nationality
Canada

Centroid Lat/Long
44° 24′ 30″ N – 75° 53′ 42″ W

Two-Minute Box
44^26′ x 75^52′

Location and description
Northwest(downriver) of Van Buren Island, east of Cook Point (of Canadian mainland)

Former, informal, or alternate names
“Bluff”, “Flat”, Hog”

Municipality
Leeds and Thousand Is.

County
Leeds and Grenville

Province / State
ONT

Ports?

Book refs

1000islands.co ID #
871

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Data source.