The Campeonato Carioca Série B2 is the fourth tier of the professional state football league in the Brazilian state of Rio de Janeiro.

It is run by the Rio de Janeiro State Football Federation (FERJ).

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.

[1][2] Following is the list with all the champions of the fourth level of Rio de Janeiro and their different nomenclatures over the years.