List of monarchs who lost their thrones in the 20th century

The following monarchs either lost their thrones through deposition by a coup d'état, by a referendum which abolished their throne, or chose to abdicate during the 20th century. A list of surviving former monarchs appears at the end of the article.

See also: Abolished monarchy, List of current monarchs, List of non-sovereign monarchs who lost their thrones in the 20th century