Louis-Pierre-Paul Cardin (May 21, 1840 – April 9, 1917) was a notary and political figure in Quebec.
He was born in Saint-Pierre-de-Sorel, Lower Canada, the son of Athanase Cardin and Judith Lavallée, and was educated at the Collège de l'Assomption.
Cardin was also president and secretary-treasurer for the agricultural society for Richelieu County.
Cardin established a militia company at Sorel and served as captain and then lieutenant-colonel.
He served as associate prothonotary for Montreal district from 1912 until his death in Montréal at the age of 76.