Ratinho
- Birthday: 1956-02-15
- Place of birth: Águas de Lindóia, São Paulo, Brazil
- Also know as: Carlos Massa
Carlos Roberto Massa, better known by his nickname, Ratinho (Águas de Lindóia, February 15, 1956), is a Brazilian presenter, businessman and former politician with Paraguayan citizenship. He is also the father of politician Ratinho Júnior.
