Pierre Napoleon Bonaparte (October 11, 1815 - April 7, 1881) was the son of Lucien Bonaparte and nephew of Emperor Napoleon.

Born in Rome, Italy. He died in Versailles, France.

He began his life of adventure at the age of fifteen, joining the insurrectionary bands in the Romagna (1830 . errs. 1831); was then in the United States, where he went to join his uncle Joseph, and in Colombia with General Santander (1832). Returning to Rome he was taken prisoner by order of the pope (1835-1836). He finally took refuge in England. At the revolution of 1848 he returned to France and was elected deputy for Corsica to the Constituent Assembly. He declared himself an out-and-out republican and voted even with the socialists. He pronounced himself in favour of the national workshops and against the loi Falloux. His attitude contributed greatly to give popular confidence to his cousin Louis Napoleon (Napoleon III), of whose coup d'etat on the 2nd of December 1851 he disapproved; but he was soon reconciled to the emperor, and accepted the title of prince. The republicans at once abandoned him.

From that time on he led a debauched life, and lost all political importance. He turned to literature and published some mediocre poems. In January 1870 a violent incident brought him again into prominence. As the result of a controversy with Paschal Grousset, the latter sent him two journalists to provoke him to a duel. Pierre Bonaparte took them personally to account, and during a violent discussion he drew his revolver and killed one of them, Victor Noir. This crime greatly excited the republican press, which demanded his trial. The High Court acquitted him, and criticism then fell upon the government.

Pierre Bonaparte died in obscurity at Versailles. He had married the daughter of a Paris working-man, Justine Eleanore Ruflin, by whom he had, before his marriage, two children: (1) Roland Napoleon, born on the 19th of May 1858, who entered the army, was excluded from it in 1886, and then devoted himself to geography and scientific explorations; (2) Jeanne, wife of the marquis de Vence.

He is interred in the Cimetière des Gonards in Versailles.