Berthier-sur-Mer, Quebec

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Church of Berthier-sur-Mer
Church of Berthier-sur-Mer
Location within La Matapédia RCM.
Location within La Matapédia RCM.
Berthier-sur-Mer is located in Southern Quebec
Location in province of Quebec.
Coordinates: 46°55′N 70°44′W / 46.917°N 70.733°W / 46.917; -70.733Coordinates: 46°55′N 70°44′W / 46.917°N 70.733°W / 46.917; -70.733[1]
Country  Canada
Province  Quebec
Region Chaudière-Appalaches
RCM Montmagny
Constituted July 1, 1855
 • Mayor Rosario Bossé
 • Federal riding Montmagny—L'Islet—
 • Prov. riding Côte-du-Sud
 • Total 26.80 km2 (10.35 sq mi)
 • Land 26.79 km2 (10.34 sq mi)
Population (2011)[3]
 • Total 1,398
 • Density 52.2/km2 (135/sq mi)
 • Pop 2006-2011 Increase 12.8%
 • Dwellings 791
Time zone EST (UTC−5)
 • Summer (DST) EDT (UTC−4)
Postal code(s) G0R 1E0
Area code(s) 418 and 581
A-20 (TCH)

Route 132

Berthier-sur-Mer is a town in the Montmagny Regional County Municipality within the Chaudière-Appalaches region of Quebec, Canada. It is located on the south shore of the Saint Lawrence River, east of Quebec City on Route 132.


Berthier-sur-Mer was named after Alexandre Berthier, a captain in the Carignan-Salières Regiment, who was given title to this area in 1672, then known as the seigneury of Berthier-en-bas.

During the 19th century, Irish immigrants were quarantined at nearby Grosse Isle, now a National Historic site.


A strip of rather interesting underlying sedimentary bedrock maintains a relatively straight shoreline through which a natural harbour, quite round in shape, has been eroded. The bedrock is set at about a 60 to 80° angle and is composed of hundreds of very thin layers of red shale interspersed every meter or so with 5 to 10 cm layers of what appears to be limestone. It is quite dramatic in places where it hasn't been worn down by human activities.

See also[edit]