Infanta Antónia of Portugal (or of Braganza; pron. IPA: [ɐ̃'tɔniɐ]; Antónia Maria Fernanda Micaela Gabriela Rafaela Francisca de Assis Ana Gonzaga Silvéria Júlia Augusta of Saxe-Coburg-Gotha and Braganza; Lisbon, February 17, 1845 – Sigmaringen, December 27, 1913), was a Portuguese infanta of the House of Braganza, daughter of Queen Maria II of Portugal and her King consort Ferdinand II of Portugal. Through her father, she also held the titles of Princess of Saxe-Coburg and Gotha and Duchess of Saxony. Antónia was born in 1845 at the Necessidades Palace. She married Leopold, Prince of Hohenzollern-Sigmaringen on September 12 1861. Their had three sons;
- William (1864–1927), who succeeded as Prince of Hohenzollern; married (1) Princess Maria Therese of the Two Sicilies (2) Princess Adelgunde of Bavaria
- Ferdinand (1865–1927), later King of Romania; married Princess Marie of Edinburgh
- Karl Anton (1868–1919), married Princess Josephine Caroline of Belgium
Antónia of Braganza died in the German Empire in 1913.
