D. António José Severim de Noronha, 1st Duke of Terceira, 1st Marquis of Vila Flor (18 March 1792, in Lisbon – 26 April 1860) was a Portuguese military officer, statesman and a leader of the Constitutionalist side in the Liberal Wars, as well as a Prime Minister of Portugal.

He was just two years old, when in 1795, his father died, leaving him the title of Count of Vila Flor servant to the Queen, thus inheriting an immense fortune, that included real estate and a personal income.

Not prepared to submit to the French, he resigned his commission in the army, accepted by D. Pedro de Almeida Portugal, 3rd Marquis of Alorna, then commander of Portuguese forces.

On 5 August 1811 he married his cousin, Maria José do Livramento e Melo, daughter of the Marquess of Sabugosa, strengthening his alliance with the principal families of the high nobility.

He began to serve as adjutant under General António José de Miranda Henriques, 1st Viscount of Sousel, and after 26 March 1813, Marshal William Carr Beresford, then supreme commander of the Portuguese Army.

His first period of office fell from April to September 1836, but in the latter month he joined the 'Chartist' revolt raised by the Duke of Saldanha; their forces were defeated by the army of the Count of Antas.