Sainte-Thérèse Island (St. Lawrence River)
main island of the Varennes archipelago, Quebec, Canada
Île Sainte-Thérèse (English: Sainte-Thérèse Island) is an island of the Saint Lawrence River, located northeast of Island of Montreal. Administratively attached to the municipality of Varennes, located in the Marguerite-D'Youville Regional County Municipality, in Montérégie, in the province of Quebec, in Canada.
This island has an area of approximately 5.4 square kilometres (2.1 sq mi), making it the fifth most extensive island in the Hochelaga Archipelago.
Geography
Île Sainte-Thérèse is 4.8 kilometres (3.0 mi) long and 1.6 kilometres (0.99 mi) wide. Its subsoil (limestone in the western part, shale clay in the eastern part) is covered with a layer of clay sand suitable for agriculture. The banks of the island are composed of clay and sand and are sensitive to erosion.
The 11 km perimeter area is almost uninhabited and accessible only by boat. The island is made up of agricultural land, marshes and forest. A farmer grows soybeans there. The island is surrounded by several chalets, for the most part without occupancy rights, on land belonging to the Government of Quebec.
The public source identifies “Sainte-Thérèse Island (St. Lawrence River)” as main island of the Varennes archipelago, Quebec, Canada. This brief keeps that definition visible, then builds a research path around Sainte-Thérèse, Island and Lawrence.
Why this record matters
A short description can identify a subject without explaining its stakes. For “Sainte-Thérèse Island (St. Lawrence River)”, the useful work is to connect “main island of the Varennes archipelago, Quebec, Canada” to the records capable of establishing context and consequence.
Maps, plans, fabric surveys and administrative records can establish how the site’s name, extent and function changed over time. The source revision retrieved here is dated Sep 25, 2026. The linked authority identifier is Q292160. Authority coordinates are 45.679, -73.471. 2 of 2 selected statements include explicit references; 0 carry qualifiers and 0 use preferred rank.
A single description cannot reconcile every naming convention, rebuilding phase or administrative transfer associated with a place. The source lead contains qualifying language; that uncertainty should survive quotation, summary and reuse. Authority statements aid reconciliation but still require their own references, qualifiers and ranks to be checked.
How to read it
Treat names, boundaries and functions as historically changeable. Maps, plans, inventories and administrative records can clarify what the place meant at different dates.
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Three-step research path
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Questions for further research
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This entry incorporates text from “Sainte-Thérèse Island (St. Lawrence River)” on English Wikipedia. Contributors are listed in the page history. Text is available under the Creative Commons Attribution-ShareAlike 4.0 License. Selected authority identifiers and statements are retrieved from Wikidata under CC0; their references and qualifiers remain part of the verification path.