| Birth Name: | Fausto Carlos Barreto |
| Birth Date: | 19 December 1852 |
| Birth Place: | Tauá, Ceará |
| Death Place: | Rio de Janeiro |
| Alma Mater: | Federal University of Rio de Janeiro |
Fausto Carlos Barreto (December 19, 1852 – October 2, 1915) was a Brazilian philologist, journalist, professor and politician.
Barreto was born in Tauá, Ceará on December 19, 1852. He began his studies at the Federal University of Ceará, transferring before finishing them to the Federal University of Rio de Janeiro, where he enrolled in 1874 at the School of Medicine. He left shortly before graduating. In 1883, he became a professor of Portuguese language at Colégio Pedro II.
His son, Mário Castelo Branco Barreto, was born on March 17, 1879, and also became a philologist.[1]
He died on October 2, 1915, in Rio de Janeiro.
As politician, he was president of the province of Rio Grande do Norte, from July 12 to October 23, 1889. He was also deputy general for Ceará in the last years of the Brazilian Empire.
His work as a philologist, mostly related to grammar, has made him one of the foremost experts in the field in his time. He was a corresponding member of the Institute of Ceará.