The Hereditary Prince(ss) of Monaco is the title given to the heir apparent or heir presumptive of the Monegasque throne. Traditionally, a male Hereditary Prince is also given the title Marquis of Baux. Like the Reigning Prince and all other members of the Princely Family, the Hereditary Prince is styled His (Her) Serene Highness.
| Name | Tenure | Length |
|---|---|---|
| Albert I | 20 June 1856 - 10 September 1889 | 33 years, 82 days |
| Louis II | 10 September 1889 - 26 June 1922 | 32 years, 289 days |
| Princess Charlotte | 27 June 1922 - 30 May 1944 | 21 years, 338 days |
| Rainier III | 30 May 1944 - 9 May 1949 | 4 years, 344 days |
| Princess Caroline | 23 January 1957- 14 March 1958 | 1 year, 50 days |
| Albert II | 14 March 1958 - 6 April 2005 | 47 years, 23 days |
| Princess Caroline | 6 April 2005 - present | 6 years, 322 days |