Laurentian (French: Laurentides or Laurentien) may refer to:

• Relation to Saint Lawrence
• Relation to the Saint Lawrence River
• Laurentia, the craton at the heart of the North American continent
• Canadian Shield, also known as the Laurentian Shield or the Laurentian Plateau.
• The Laurentian Abyss or Abyssal - a trench off the eastern coast of Canada
• The Laurentian Divide, also known as the "Northern Divide", a continental divide in North America
• The Laurentian mountains in Quebec
• Laurentian Upland
• The Laurentides region in Quebec
• Laurentian, Ontario, a neighborhood within Valley East, Ontario
• Laurentien (Quebec City), a borough in Quebec City, Quebec
• Laurentian University in Sudbury, Ontario
• The Laurentian Bank of Canada
• The Laurentian language, a language in the Iroquoian family of languages
• Laurentian Codex, a Russian manuscript
• The Adirondack (train), a train operated by the Delaware & Hudson
• Princess Laurentien of the Netherlands, a member of the Dutch royal family
• Laurentien (art supplies), a Canadian brand of art supplies
• Laurentian System in Star Trek

Laurentien est un des huit arrondissements de Québec. Il est formé des anciennes villes de Val-Bélair, Cap-Rouge et une partie de Sainte-Foy. C'est l'arrondissement qui est situé le plus à l'ouest.

De voornaam Laurentien is de vrouwelijke variant van Laurent, afgeleid van het Latijnse Laurentius.