Berthier-sur-Mer

• Name — Berthier-sur-Mer • Type — Municipality • Motto — Sur terre et sur mer, Berthier toujours plus fier • Image Shield — Blason ville ca Berthier-sur-Mer.svg • Shield Size — 100x80px • Image Map — Berthier-sur-Mer Quebec location diagram.png • Map Caption — Location within Montmagny RCM • Pushpin Map — Canada Southern Quebec • Pushpin Caption — Location in province of Quebec • Subdivision Type — Country • Subdivision Type1 — Province • Subdivision Type2 — Region • Subdivision Name2 — Chaudière-Appalaches • Subdivision Type3 — RCM • Subdivision Name3 — Montmagny • Established Title1 — Constituted • Established Date1 — July 1, 1855 • Leader Title — Mayor • Leader Name — Richard Gallibois • Leader Title1 — Fed. riding • Leader Name1 — Côte-du-Sud—Rivière-du-Loup—Kataskomiq—Témiscouata • Leader Title2 — Prov. riding • Leader Name2 — Côte-du-Sud • Area Total Km2 — 26.85 • Area Land Km2 — 26.85 • Population Total — 1744 • Population As Of — 2021 • Population Density Km2 — 65.0 • Population Blank1 Title — Pop 2016-2021 • Population Blank1 — 12.2% • Population Blank2 Title — Dwellings • Population Blank2 — 939 • Time Zone — EST • Utc Offset — −5 • Time Zone Dst — EDT • Utc Offset Dst — −4 • Postal Code Type — Postal code(s) • Postal Code — G0R 1E0 • Area Codes — 418 and 581 • Custom Label Sec1 — Highways Berthier-sur-Mer (Berthier on Sea) is a municipality/town in the Montmagny Regional County Municipality within the Chaudière-Appalaches region of Quebec, Canada. It is located on the south shore of the St. 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. A year later, Berthier acquired another concession in the Lanaudière region, and his seignories became known as Berthier-en-bas (Lower Berthier) and Berthier-en-Haut (Upper Berthier, now Berthierville). In 1722, the Parish of Notre-Dame-de-l'Assomption-de-Bellechasse was created, but the place was called Berthier-en-bas in common use. In 1845, the Parish Municipality of Berthier en bas was formed, dissolved in 1847, and reestablished in 1855. On August 29, 1971, the parish municipality was renamed to Berthier-sur-Mer, following the local practice of referring to the St. Lawrence River as a sea at this point due to its increasing width, tides, and salinity. On February 7, 2004, it changed statutes and became a regular municipality.

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 layers of what appears to be limestone. It is quite dramatic in places where it hasn't been worn down by human activities.

• Victor Allard, mayor of Berthier from 1899 to 1903 and from 1912 to 1915 • Camille Roy, literary critic • Paul-Eugène Roy, Archbishop of Quebec • Jean-Marc Vallée, filmmaker