The steam frigate Amazonas was a frigate-type warship that served in the Imperial Brazilian Navy and, for a short period, in the Brazilian Navy after the Proclamation of the Republic in 1889. The frigate was built in the Thomas Wilson Sons & Co. shipyards in Birkenhead and Liverpool, England; it was launched in August 1851. The purchase of this vessel was part of an effort by the Empire of Brazil to obtain more modern ships, due to the country's lag with some foreign powers. Amazonas was commissioned in 1852.