Joseph-Napoléon Bonaparte (born Giuseppe Buonaparte; 7 January 1768 – 28 July 1844) was a French diplomat and nobleman, the elder brother of Napoleon Bonaparte, who made him King of Naples and Sicily (1806–1808), and later King of Spain (1808–1813, as José I). After the fall of Napoleon, Joseph styled himself Comte de Survilliers.

Joseph was born in 1768 to Carlo Buonaparte and Maria Letizia Ramolino at Corte, the capital of the Corsican Republic. In the year of his birth, Corsica was invaded by France and conquered the following year. His father was originally a follower of the Corsican Patriot leader, Pasquale Paoli, but later became a supporter of French rule.

As a lawyer, politician, and diplomat, Joseph served in the Cinq-Cents and was the French ambassador to Rome. On 30 September 1800, as Minister Plenipotentiary, he signed a treaty of friendship and commerce between France and the United States at Morfontaine, alongside Charles Pierre Claret de Fleurieu, and Pierre Louis Roederer.

In 1795 Joseph was a member of the Council of Ancients, where he used his position to help his brother overthrow the Directory four years later.

The Château de Villandry had been seized by the French Revolutionary government; and, in the early 19th century, Joseph's brother, Emperor Napoleon, acquired the château for him.

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