| Office: | Member of the National Assembly for Martinique's 2nd constituency |
| Term Start: | 22 June 2022 |
| Predecessor: | Manuéla Kéclard-Mondésir |
| Birth Date: | 2 November 1962 |
| Birth Place: | Saint-Pierre, Martinique |
| Party: | Péyi-A |
| Otherparty: | NUPES (2022) |
Marcellin Nadeau (born 2 November 1962) is a French politician. He became the Member of Parliament for Martinique's 2nd constituency in the 2022 French legislative election.[1]