Claude Duplain (born January 10, 1954) is a Canadian politician.
From 1993 to 1996, he was president and shareholder of Construction du Grand Portneuf.
He worked as a designer for the architectural firm Beaudet, Nolet & Arcam Inc, and also for VariaHab which specializes in prefabricated houses.
He completed an architectural technical design course in 1971 after terminating his secondary education in 1970.
He took further training in marketing, accounting, data processing, first aid and English.