Saint Prosper may refer to:
- Prosper of Aquitaine (c. 390–c. 455), Christian writer and disciple of Saint Augustine of Hippo
- Prosper of Reggio (died 466), Italian saint
Saint-Prosper may refer to:
- Saint-Prosper, Chaudière-Appalaches, Quebec, Canadian municipality
- Saint-Prosper-de-Champlain, Quebec, Canadian municipality