Last modified: 28 February 2021
Deaths in reigning and non-reigning royal houses of the year 2006.
* = New
| Date | Name | Age | Place |
| January 4 | Sheikh Maktoum bin Rashid al-Maktoum, Emir of Dubai (UAE) | 62 | |
| January 8 | Prince Georg Wilhelm von Hannover | 90 | München, Germany |
| January 12 (car crash) | Sheikh Faisal bin Hamad Al Khalifa of Bahrain | 15 | |
| January 15 | Sheikh Jaber al-Ahmad al-Sabah, Emir of Kuwait | 79 | |
| January 21 | Countess Alida van Aldenburg Bentinck née Vlieger | 96 | Amersfoort, The Netherlands |
| January 25 | Prince Leopold zu Schaumburg-Lippe | 95 | Bad Waldsee, Germany |
| January 27 | Carol Mircea Hohenzollern (Romania) | 86 | London, Great Britain |
| January 28 | Fürst Friedrich zu Solms-Baruth | 79 | Somerset West, South Africa |
| January 28 | Princess Al-A’noud bint Saud bin Abdulaziz Al Saud of Saudi Arabia | 83 | |
| February 10 | Sheikh Thani bin Juma Al Maktoum of Dubai (UAE) | Dubai, UAE | |
| February 12 | Princess Maria Esterházy de Galántha | 100 | |
| February 21 | Sieglinde Bußmann née Princess zu Salm-Horstmar | 90 | |
| February 21 | Prince Fahd bin Abdullah bin Saud bin Nasir al-Fahran Al-Saud of Saudi Arabia | 72 | |
| February 23 | Douglas Auff’m-Ordt (Croÿ) | 88 | Dülmen, Germany |
| February 24 | Carl-Joachim von Butler (Castell-Castell) | 64 | |
| February 26 | Prince Miteb bin Faisal bin Abdullah bin Abdulrahman al Saud of Saudi Arabia | 65 | Abroad |
| March 10 | Prince Kraft-Alexander zu Hohenlohe-Oehringen | 80 | Fürth, Germany |
| March 23 | Fürstin Feodora von Auersperg née Countess zu Solms-Baruth | 85 | Vienna, Austria |
| April 2 | Baroness Johanna Maria von Skal née Countess von Schönborn | 90 | |
| April 21 | Princess Lyna von Schönburg-Hartenstein née Rodriguez Maldonado | 91 | Lausanne, Switzerland |
| April 23 | Countess Franziska von Spee née Princess von und zu Liechtenstein | 75 | |
| April 29 | Hansjoachim von Wartenberg (Waldeck und Pyrmont) | 70 | Garmisch-Partenkirchen, Germany |
| May 23 | Maria Adelgunde Huber née Princess von Hohenzollern | 85 | Frauenfeld, Switzerland |
| June 3 | Princess Annemarie von Thurn und Taxis née Zhuber von Okróg | 72 | |
| June 16 or 17 | Sheikha Sana bint Mana bin Rashid Al Maktoum of Dubai (UAE) | ||
| June 22 | Princess Barbara von Lobkowicz | 82 | München, Germany |
| June 24 | Prince Philippe de Croÿ-Roeulx | 78 | Chesnay, Belgium |
| June 29 | Prince Friedrich Karl of Prussia | 87 | Mallorca, Spain |
| July 6 (car crash) | Prince Tu’ipelehake of Tonga | 56 | San Francisco, CA, USA |
| July 6 (car crash) | Princess Kaimana Fielakepa of Tonga | 46 | San Francisco, CA, USA |
| July 11 | Countess Josephine von Posadowsky-Wehner née Princess von Hohenzollern | 84 | Andernach, Germany |
| July 11 | Albert Colelough (Schönburg-Waldenburg) | 67 | |
| July 21 | Fürstin Margarethe von Schönburg-Hartenstein née Princess zu Windisch-Graetz | 78 | |
| July 26 | Fürstin Tatiana von Metternich-Winneburg née Princess Wassiltschikow | 91 | Johannisberg Castle, Germany |
| July 30 | Princess Rosa zu Hohenlohe-Langenburg née Bittermann | 79 | |
| * August 1 | Esther Blanche “Jill” Johnson née Murphy (Russia) | 84 | Australia |
| August 4 | Duchess Maria Margarethe zu Mecklenburg-Strelitz née Prinzessin von Hohenzollern | 78 | Hechingen, Germany |
| August 8 | Prince Christopher zu Hohenlohe-Langenburg | 49 | Bangkok, Thailand |
| August 11 | Countess Iphigenie zu Pappenheim | 94 | |
| August 21 | Prince Fahd ibn Saud ibn Abdul Aziz of Saudi Arabia | 77 | |
| September 10 | King Taufa’ahau Tupou IV of Tonga | 88 | Auckland, New Zealand |
| September 21 | Princess Margaretha de Bourbon de Parme née Princess von Thurn und Taxis | 96 | Forte dei Marmi, Italy |
| October 10 | Count Franz Joseph von Degenfeld-Schonburg (Schaumburg-Lippe) | 44 | |
| October 10 | Prince Saad bin Khalid bin Mohammed bin Abdulrahman of Saudi Arabia | 70 | USA |
| October 27 | Count Albrecht von Schlitz gen. von Goertz, Freiherr von Wrisberg | 92 | |
| October 28 | Countess Maria-Irmgard zu Stolberg-Wernigerode née Freiin von Willisen | 92 | Heiligenberg, Germany |
| October 29 | Prince Fahd bin Saad bin Abdulaziz of Saudi Arabia | 67 | Abroad |
| November 13 | Count Friedrich-Hans zu Solms-Baruth | 83 | |
| November 17 | Princess Cecil von Fürstenberg née Blaffer | 86 | Houston, TX, USA |
| November (burial 21) | Prince Abdullah bin Faisal bin Farhan al Saud of Saudi Arabia | Riyadh, Saudi Arabia | |
| November 27 | Prince Wilhelm von und zu Liechtenstein | 84 | Vienna, Austria |
| December 5 | Alexandra Galitzine Armour née Princess Galitzine (Russia) | 101 | Lake Forest, Ill, USA |
| December 16 | Fürstin Irene zu Castell-Rüdenhausen née Countess zu Solms-Laubach | 81 | Rüdenhausen, Germany |
| December 17 | Fürst Karl Adolf von Auersperg | 91 | Vienna, Austria |
| December 24 | Princess Joheir bint Fahd bin Saad bin Abdulrahman of Saudi Arabia | 67 | |
| Unknown | Hereditary Count Michael zu Solms-Wildenfels | 57 |