Prince Louis may refer to:
French princes
Princes of Condé
Louis I, Prince of Condé (1530–1569), prominent Huguenot leader and general, the founder of the House of Condé
Louis, Grand Condé (1621–1686), French general
Louis III, Prince of Condé (1668–1710) prince du sang at the French court of Louis XIV
Louis Joseph, Prince of Condé (1736–1818), Prince du sang
Louis Henri, Prince of Condé (1756 - 1830), brother-in-law of Philippe Égalité
Louis Henri, Duke of Bourbon (1692–1740), prime minister to his kinsman Louis XV
Princes of Conti
François Louis, Prince of Conti (1664–1709), Prince de Conti
Louis Armand I, Prince of Conti (1661–1685), son-in-law of Louis XIV
Louis Armand II, Prince of Conti (1695–1727), Prince of Conti
Louis François, Prince of Conti (1717–1776), French nobleman
Louis François Joseph, Prince of Conti (1734–1814), last Prince of Conti
Others
Prince Louis, Duke of Nemours (1814–1896), son of King Louis Philippe I
Louis, Prince Napoléon (1914–1997), Head of the House of Bonaparte from 1926 to 1997
Others
German princes
Louis I, Prince of Anhalt-Köthen (1579–1650), Prince of Anhalt from 1586 to 1603
Prince Louis of Battenberg (1854–1921), later titled Marquess of Milford Haven, British naval officer and German prince
Prince Louis of Battenberg (1900–1979), later Louis Mountbatten, 1st Earl Mountbatten of Burma, British naval officer and last Viceroy of India
Italian princes
Prince Louis, Count of Aquila (1824–1897), member of the House of Bourbon-Two Sicilies
Prince Louis, Count of Trani (1838–1886), son of Ferdinand II of the Two Sicilies
Monégasque princes
Louis I, Prince of Monaco (1642–1701), Prince of Monaco from 1662 to 1701
Louis II, Prince of Monaco (1870–1949), Prince of Monaco from 1922 to 1949
Others
Prince Louis of Luxembourg (born 1986), son of Grand Duke Henri
Prince Louis of Wales (born 2018), son of William, Prince of Wales