The 4th House of Orléans (French: Maison d'Orléans), sometimes called the House of Bourbon-Orléans (French: Maison de Bourbon-Orléans) to distinguish it, is the fourth holder of a surname previously used by several branches of the Royal House of France, all descended in the legitimate male line from the dynasty's founder, Hugh Capet. The house was founded by Philippe I, Duke of Orléans, younger son of Louis XIII and younger brother of Louis XIV, the "Sun King".

From 1709 until the French Revolution, the Orléans dukes were next in the order of succession to the French throne after members of the senior branch of the House of Bourbon, descended from Louis XIV. Although Louis XIV's direct descendants retained the throne, his brother Philippe's descendants flourished until the end of the French monarchy. The Orléanists held the French throne from 1830 to 1848 and are still pretenders to the French throne today.

House of Orléans-Braganza

The House of Orléans-Braganza (Portuguese: Casa de Orléans-Bragança) is a Brazilian imperial house of Portuguese and French origin. It is a cadet branch of the House of Braganza, of Portugal and later Brazil, and the House of Orléans, of France. The house was founded with the marriage between Isabel of Braganza, Princess Imperial of Brazil, and Prince Gaston of Orléans, Count of Eu. The house was never a reigning house, as Brazil's pure Braganza monarch, Pedro II, was deposed in 1889. The House's members are the current claimants to the Brazilian throne since 1921 as part of the Imperial House of Brazil. The house is also the second in the Orleanist line of succession to the French royal throne.