Tomás Antônio Maciel Monteiro, 1st Baron of Itamaracá (1780 – November 22, 1847) was a Brazilian politician and magistrate. He was born in Recife, Pernambuco, to Antônio Francisco Monteiro and Joana Ferreira Maciel Gouvim. In 1804, he was sent to the University of Coimbra, where he graduated in Law in 1809. Returning to Brazil, he studied at the Faculdade de Direito de Recife. He married Ana Augusta Tavares Osório Maciel da Costa, daughter of , the Marquess of Queluz. He was proclaimed the Baron of Itamaracá in 1843, in a post that would last until his death, in 1847.