It is the second biggest city in the RCM, after La Pocatière.

Saint-Pascal was named in honour of Paschal Taché, seigneur of Kamouraska.

The original spelling of the municipality, based on the Latin Paschalis, was given in honour of Étienne-Paschal Taché, a notary and militia lieutenant-colonel.

In November 1813, he became co-seigneur of Kamouraska with his father, Paschal-Jacques.

On his father's death, he assumed sole ownership of the seigneury.