| The Marquess of Nervión | |
| Office: | Prime Minister of Spain |
| Term Start: | 15 October 1857 |
| Term End: | 14 January 1858 |
| Predecessor: | Ramon Maria Narvaez |
| Successor: | Francisco Javier Isturiz |
| Birthname: | Francisco Armero y Fernández de Peñaranda |
| Nationality: | Spanish |
| Honorific Prefix: | The Most Excellent |
Francisco Armero y Fernández de Peñaranda (3 May 1804, in Fuentes de Andalucía – 1 July 1866, in Seville), Marquess of Nervión and Grandee of Spain was a Spanish Captain general of the Navy and politician.
He entered the Navy aged 16 and fought in the Battle of Trocadero (1823), Peruvian War of Independence (1824) and First Carlist War (1834–1840).
In 1840, he became for the first time Minister of the Navy, Commerce and Colonies under Prime Ministers Antonio González González, Valentín Ferraz y Barrau and Modesto Cortázar until 11 September 1840. Four years later, he became again Minister of the Navy, Commerce and Colonies in the Ramón María Narváez cabinet between 3 May 1844 and 12 February 1846, and again between 5 April 1846 and 28 January 1847 in the Francesco Xavier de Isturiz cabinet. He also held the post of Minister of War for a few days in April 1846.
He became for a fourth time Minister of the Navy between 2 June 1851 and 3 May 1852 under Juan Bravo Murillo.
Finally, he became Prime Minister himself on 15 October 1857. His cabinet held out until 14 January 1858, in which he also held the posts of Minister of the Interior and Minister of War.
On 22 February 1862 he received the title of Marqués de Nervión, and on 13 February 13, 1856 Captain general of the Navy. But before that, he had served a fifth term as Minister of the Navy between 16 September 1864 and 21 Juny 1865 under Ramón María Narváez.