Campeonato Maranhense Série B
| Organising body | FMF |
|---|---|
| Founded | 1921 |
| Country | Brazil |
| State | Maranhão |
| Level on pyramid | 2 |
| Promotion to | Campeonato Maranhense |
| Current champions | Luminense (1st title) (2025) |
| Most championships | IAPE Maranhão Moto Club Santa Quitéria (2 titles each) |
| Website | FMF Official website |
The Campeonato Maranhense Série B, also known as Campeonato Maranhense Second Division is the second tier of the professional state football league in the Brazilian state of Maranhão. It is run by the Maranhão Football Federation (FMF).