Last modified: 12 March 2021
Deaths in reigning and non-reigning royal houses of the year 2011.
* = New
| Date | Name | Age | Place |
| 4 January | Prince Alireza Pahlavi (Iran) | 44 | Boston, Massachusetts, USA |
| 6 January | Prince Faisal bin Fahd bin Abdullah bin Jalloway al Saud of Saudi Arabia | 86 | |
| 12 January | Duchess Ilona zu Mecklenburg née Archduchess of Austria | 83 | Bad Krozingen, Germany |
| 13 January | Duke Georg-Moritz von Oldenburg | 53 | Rickling, Germany |
| 16 January | Count Friedrich Karl von Schönborn-Buchheim | 96 | |
| 20 January | Shrimant Ranbir Singhji Sahib Bahadur, 16th and last Maharaja of Ratlam | 78 | |
| 23 January | Sheikh Abdulla bin Sultan bin Rashid Al Nuaimi of Ajman (UAE) | ||
| 2 February | Prince Saud ibn Khalid ibn Mohammed ibn Abdulrahman al Saud of Saudi Arabia | 75 | abroad |
| 4 February | Duchess Gertrud von Oldenburg née Princess zu Löwenstein-Wertheim-Freudenberg | 85 | |
| 6 February | Princess Nicole de Croÿ née Countess de Marnix de Sainte Aldegonde | 91 | Kraainem, Belgium |
| 15 February | Carl Barton Hess (Schwarzenberg) | 98 | New York, USA |
| 16 February | Antoinette Auff’m-Ordt née Princess de Croÿ | 95 | Dülmen, Germany |
| 16 February | Fürstin Eleonore zu Salm-Salm née von Zitzewitz | 91 | Aumühle/Reinbek, Germany |
| 3 March | Sheikh Khaled Al-Yousif Al-Saud Al-Sabah of Kuwait | 57 | |
| 10 March | Michel Denizot (Bourbon-Two Sicilies) | 87 | Paris, France |
| 11 March | Jörg Brena (Sachsen-Weimar und Eisenach) | 89 | Bad Krozingen, Germany |
| 16 March | Fürst Paul von Quadt zu Wykradt und Isny | 80 | Lindau, Germany |
| 17 March | Princess Antoinette of Monaco, baroness de Massy | 90 | Centre Hospitalier Princesse Grace, Monaco |
| 21 March | Count Léopold de Lannoy (Croÿ) | 84 | |
| 22 March | Tengku Ampuan Bariah Sultan Alam Shah (Terengganu, Malaysia) | 77 or 78 | Seri Kota Hospital, Klang, Selangor, Malaysia |
| 3 April | Count Wilhelm zu Stolberg-Stolberg | 83 | Cascais, Portugal |
| 13 April | Princess Seeta bint Abdul Aziz bin Abdul Rahman Al-Saud of Saudi Arabia | 80 | |
| 16 April | Bhawani Singh, Maharaja of Jaipur | 79 | Hospital, Gurgaon, India |
| 17 April | Prince Franz zu Windisch-Graetz | 98 | Vienna, Austria |
| 18 April | Princess Theresa de Orleans e Bragança (Brazil) | 91 | Estoril, Portugal |
| 2 May | Sheikha Moaza bint Hamad al-Khalifa of Bahrain | Riffa, Bahrain | |
| 4 May | Sheikh Khalid al-Ahmad al-Jaber al-Sabah of Kuwait | 76 | |
| 6 May | Princess Laura von und zu Liechtenstein née dei Marchesi Malvezzi Campeggi | 70 | Frauenthal Castle, Deutschlandsberg, Austria |
| 6 May | Freifrau Marie-Antonia von Twickel née Countess zu Stolberg-Stolberg | 87 | Westheim, Germany |
| 13 May | Princess Dona Maria de Orleans e Bragança (Brazil) née Princess of Bavaria | 96 | Jardim Botânico, Rio de Janeiro, Brazil |
| 25 May | Inge Kollmann née Sponer (Thurn und Taxis) | 89 | |
| 26 May | Donald Bruce Guthrie (Königsegg-Aulendorf) | 84 | Los Angeles, California, USA |
| 31 May | Raja Saidatul Ihsan Tengku Badar Shah (Selangor, Malaysia) | 88 | Ampang Puteri Hospital, Kuala Lumpur, Malaysia |
| 10 June | Prince Khalid bin Abdullah bin Saud bin Abdulaziz Al Saud of Saudi Arabia | 54 | |
| 11 June | Princess Munira Bint Sultan Ibn Abdulaziz Al Saud of Saudi Arabia | 59 | |
| 14 June | 14th Duke of Croÿ | 96 | |
| 17 June | Prince Georg von Auersperg | 88 | |
| 17 June | Rama Varma Kochaniyan Thampuran (Cochin, India) | 91 | Bharananganam, India |
| 20 June | Freifrau Helene-Sophie von Forstner née Princess zu Waldeck und Pyrmont | 66 | |
| 28 June | Sheikh Abdulla bin Khalifa bin Salman Al Khalifa of Bahrain | ||
| * 1 July | Maharaja Bahadur Narendra Singh of Sarila | 83 or 84 | Geneva, Switzerland |
| 4 July | Dr Otto von Habsburg, last Crown Prince of Austria and Hungary | 98 | Villa Austria, Pöcking am Starnberger See, Germany |
| 4 July | Princess Ilse Lilly von Croÿ née Hofmann | 74 | |
| 8 July | Archduchess Maria Valerie of Austria née Countess von Waldburg-Zeil-Hohenems | 98 | |
| 8 July | Princess Sidonia Lobkowicz “Sonja” | 86 | Coventry, UK |
| 13 July | Princess Katrin von Sachsen-Coburg und Gotha née Bremme | 71 | Grein, Austria |
| 23 July | Countess Stephanie von Harrach née Countess von und zu Eltz gen. Faust von Stromberg | 93 | |
| 27 July | Princess Bejaratana Rajasuda of Thailand | 85 | Siriraj Hospital, Bangkok, Thailand |
| 29 July | Princess Sultana Bint Turki Al-Sudairi (Saudi Arabia) | 71 | |
| 31 July (burial) | Prince Khalid bin Yazid bin Abdullah bin Abdulrahman Al-Saud of Saudi Arabia | Riyadh, Saudi Arabia | |
| 1 August | Elisabeth Düvelius née Countess zu Castell-Rüdenhausen | 96 | Uffing am Staffelsee, Germany |
| 15 August | 12th Duke of Arenberg | 90 | Lausanne, Switzerland |
| 18 August | Maria-Theresia Dessewffy de Csernek et Tarkö née Princess von und zu Liechtenstein | 57 | Australia |
| 19 August | Michaela Rosemeyer née Countess zu Castell-Rüdenhausen | 65 | Grünwald, München, Germany |
| 19 August | Countess Elisabeth zu Stolberg-Stolberg née Countess Kinsky von Wchinitz und Tettau | 75 | |
| 24 August | Princess Muneerah bint Abdul Aziz bin Musaed bin Juluwe Al-Saud of Saudi Arabia | 80 | Neuilly-sur-Seine, Hauts-de-Seine, France |
| 25 August | Thomas Rehner (Hohenlohe-Schillingsfürst) | 93 | Nürnberg, Germany |
| 29 August | Prince Alexander della Torre e Tasso | 71 | Awendaw, South Carolina, USA |
| 30 August | Prince Adrian von Sachsen-Coburg und Gotha | 55 | Bern, Switzerland |
| 4 September | Princess Lalla Aicha of Morocco | 81 | Rabat, Morocco |
| 4 September | Count Georg zu Stolberg-Stolberg | 83 | Kamenz, Germany |
| 6 September | Archduke Felix of Austria | 95 | San Ángel, Mexico |
| 7 September | Princess Catherine zu Sayn-Wittgenstein née Bennie | 47 | Vancouver, Canada |
| 11 September | Countess Amelie zu Dohna-Schlobitten née Countess zu Ortenburg | 101 | Garmisch-Partenkirchen, Germany |
| 12 September | Prince Rasso of Bavaria | 85 | Tutzing am Starnberger See, Germany |
| 12 September | Princess Nora bint Turki bin Abdulaziz bin Turki Al-Saud of Saudi Arabia | 95 | |
| * 22 September | Baronne Grand d’Esnon née Princess Gertrud-Renata Reuss | 86 | Clichy-la-Garenne, Hauts-de-Seine, France |
| 26 September | Princess Qumash bint Abdulaziz bin Abdulrahman Al-Saud of Saudi Arabia | 85 | |
| 28 September | Count Botho von Hohenthal-Püchau (Bentheim-Tecklenburg) | 85 | |
| 1 October | Count Conradin Friedrich zu Castell-Rüdenhausen | 77 | Ingå, Finland |
| 1 October | Princess Masha’el bint Faisal bin Abdulaziz of Saudi Arabia | 72 | |
| 6 October | Raja Perempuan Muzwin of Perak (Malaysia) | 82 | Institut Jantung Negara, Kuala Lumpur, Malaysia |
| 8 October | Prince Abdulrahman bin Ahmad bin Abdulrahman Al-Saud of Saudi Arabia | 67 | |
| 11 October | Countess Maria Antonia von Waldburg zu Wolfegg und Waldsee née Princess von Hohenzollern | 90 | |
| 12 October | Auguste Brubach née Princess zu Salm-Salm | 95 | |
| 13 October | Countess Henriette von und zu Eltz gen. Faust von Stromberg née Princess von und zu Liechtenstein | 96 | |
| 18 October | Prince Saiful Mulk Nasir, Mehtar of Chitral | 61 | Islamabad, Pakistan |
| 22 October | Prince André de Bourbon de Parme | 83 | Dourdan, Essonne, France |
| 22 October | Crown Prince Sultan bin Abdulaziz al-Saud of Saudi Arabia | about 80 | Presbyterian Hospital, Manhattan, New York, USA |
| 24 October | Archduke István (Stefan) of Austria | 77 | Benedictus Hospital, Tutzing, Germany |
| 30 October | Fürstin Franziska zu Hohenlohe-Bartenstein née Princess zu Oettingen-Oettingen und Oettingen- Spielberg | 64 | Hospital, Bad Mergentheim, Germany |
| 2 November | Prince Ahmed Ibrahim of Egypt | 69 | |
| 4 November | Countess Gisela von Schlitz gen. von Görtz und Wrisberg née Stang | 90 | |
| 15 November | Otto Kurzendorfer (Pappenheim) | 74 | |
| 15 November (suicide) | Juan Ramón Theler (Sayn-Wittgenstein-Hohenstein) | 79 | Manacor, Spain |
| 17 November | Count Stephan von Walderdorff (Croÿ) | 48 | |
| 19 November | Prince Franz-Karl zu Salm-Salm | 93 | Wallhausen, Germany |
| 19 November (burial) | Princess Hajer bint Saud bin Abdulaziz Al-Saud of Saudi Arabia | 53 | abroad |
| 21 November | Princess Christina von Hessen | 78 | Gersau, Switzerland |
| 22 November | Duchess Elisabeth von Hohenberg née Princess of Luxembourg | 88 | Fischbach Castle, Luxembourg |
| 30 November | King Leka I of the Albanians | 72 | Mother Teresa Hospital, Tirana, Albania |
| 11 December | Fürst Heinrich von Orsini und Rosenberg | 86 | |
| 13 December | Don José Maria Trénor y Suarez de Lezo, 11th Marquess de Serdañola (Löwenstein-Wertheim-Rosenberg) | 72 | Cerdanyola del Vallès, Spain |
| 20 December | Countess Agathe zu Ortenburg née Countess von Schaesberg | 86 | Coburg, Germany |
| 28 December | Count Clemens von Matuschka (Hohenlohe-Waldenburg-Schillingsfürst) | 83 | Moone Abbey, Moone, Co. Kildare, Ireland |
| 30 December | Sheikha Nasima Al-Humood Al-Jaber Al-Mubarak Al-Sabah of Kuwait | 73 |