Jacques I (disambiguation)
Jacques I may refer to:
- Jacques I, Prince of Monaco (1689–1751), the Prince of Monaco
- Jacques I, Emperor of Haiti (1758–1806), the Emperor of Haiti
Pretenders
- Jaime, Duke of Madrid (1870–1931), the Duke of Madrid and Legitimist pretender to the defunct French throne as "Jacques I"
Self-proclaimed monarchs
- Jacques Lebaudy (1868-1919), the self-proclaimed "Emperor of the Sahara"