Monarchy of Luxembourg
| Grand Duke of Luxembourg | |
|---|---|
| Groussherzog vu Lëtzebuerg Grand-duc de Luxembourg | |
| Incumbent | |
| Guillaume V since 3 October 2025 | |
| Details | |
| Style | His Royal Highness |
| Heir apparent | Prince Charles of Luxembourg |
| First monarch | William I, King of the Netherlands, Grand Duke of Luxembourg |
| Residence | Grand Ducal Palace, Berg Castle, Colmar-Berg |
| Website | monarchie |
The monarchy of Luxembourg is the institution headed by the grand duke of Luxembourg, who is the head of state of the country. Luxembourg has been a grand duchy since 15 March 1815, when it was created from territory of the former Duchy of Luxembourg. It was in personal union with the United Kingdom of the Netherlands until 1890 under the House of Orange-Nassau. Luxembourg is the world's only sovereign grand duchy, and since 1815 there have been ten monarchs, including the incumbent, Guillaume V.