Joaquim Osório Duque-Estrada (April 19, 1870 – February 5, 1927) was a Brazilian poet, essayist, journalist, literary critic and professor.
He is famous for writing in 1909 a poem that would become the lyrics of the Brazilian National Anthem in 1922.
He occupied the 17th chair of the Brazilian Academy of Letters from 1915 until his death in 1927.