Márcia de Windsor
- Born
- 3 October 1933 (48 years old)
- Died
- 4 August 1982
- Place of birth
- Outro Preto, Minas Gerais, Brazil
- Gender
- Female
Márcia Couto Barreto (Ouro Preto, October 3, 1934 — São Paulo, August 4, 1982), better known as Márcia de Windsor, was a Brazilian actress.
