The Campeonato Carioca Série B2 is the football fourth level of the First Division annual competition among clubs in the state of Rio de Janeiro, Brazil.

The current version from 2021 of Campeonato Carioca Série B2 is the fourth-highest level. The previous version of the tournament was implemented in 2017 as the third-highest level, replacing the old Série C, which became the state's fourth division.