Last modified: 30 August 2020
Deaths in reigning and non-reigning royal houses of the year 2020.
| Date | Name | Age | Place |
| January 6 | Count Michel Didisheim (Trauttmansdorff-Weinsberg) | 89 | Forest, Belgium |
| January 8 | Infanta Pilar of Spain, Duchess of Badajoz | 83 | Clínica Ruber Internacional, Madrid, Spain |
| January 10 | Qaboos bin Said al Said, Sultan of Oman | 79 | |
| January 21 | Prince Bandar bin Mohammed bin Abdulrahman bin Faisal Al Saud of Saudi Arabia | 95 | |
| January 29 | Princess Monika zu Ysenburg und Büdingen née Baroness von Plessen | 80 | |
| February 8 | Princess Yi Haewŏn of Korea | 100 | |
| February 13 (accident) | Cristina de Borbón y Hardenberg (Spain) | 44 | Puerta de Hierro Hospital, Madrid, Spain |
| February 15 | Count Felix von Orsini und Rosenberg | 90 | |
| February 20 | Princess Christa Irene zur Lippe née von Arnim | 96 | |
| February 23 | Count Bernard de Looz Corswarem | 73 | |
| February 24 | Eduard Weig (Castell-Castell) | 67 | |
| February 26 | Prince Talal bin Saud bin Abdulaziz Al Saud of Saudi Arabia | ||
| March 2 | Sheikh Ahmed bin Mohammad bin Salman Al Khalifa of Bahrain | ||
| March 5 | Prince Max Emanuel von Thurn und Taxis | 84 | |
| March 10 | Prince Abdulaziz bin Abdullah bin Faisal bin Farhan Al Saud of Saudi Arabia | ||
| March 14 | Maria Anna Teresia Laurentia Wildschut-von Schwarzenberg | 94/95 | |
| March 14 | Countess Beatrice von Hardenberg (Spain) | 72 | Hospital Quirón de Marbella, Spain |
| March 17 | María de las Mercedes de Zornoza y Ponce de León (Georgia) | 77 | Villafranca del Castillo, Madrid, Spain |
| March 24 | Raimondo Principe Orsini d’Aragona (Georgia) | 89 | Rome, Italy |
| March 24 | Prapapan Kornkosiyakaj née Princess Prapapan Bhanubandhu (Thailand) | 90 | Chulabhorn Hospital, Thailand |
| March 26 (covid-19) | Princess Marie-Thérèse de Bourbon de Parme | 86 | Paris, France |
| March 26 / 27 | Prince Nikolaus zu Bentheim-Tecklenburg | 95 | Schloss Rheda, Germany / Herzebrock-Clarholz, Germany |
| April 9 | The mother of Prince Abd al-Rahman bin Sa’d II bin Abd al-Rahman of Saudi Arabia | ||
| April 14 | Freiherr Friedrich Mayr von Melnhof (Orsini und Rosenberg) | 95 | Glanegg Castle, Grödig, Austria |
| April 15 | Princess Diane de Croÿ | 93 | Avesnes-sur-Helpe, Belgium |
| April 16 | Prince Georg Friedrich zu Waldeck und Pyrmont | 83 | |
| April 19 | Fürstin Hildegard zu Stolberg-Roßla née Sauerbier | 97 | MathildenHospital, Büdingen, Germany |
| April 29 | 80th Prince and Grand Master Fra’ Giacomo Dalla Torre del Tempio di Sanguinetto (Order of Malta) | 75 | Rome, Italy |
| May 4 | Princess Diana Marguerite de Bourbon-Parme | 87 | Bad Krozingen, Germany |
| May 6 | Essawi Khadr (Albania) | ||
| May 6 | José Pedro Sebastián de Erice y Gómez-Acebo (Schönborn-Buchheim) | 77 | |
| May 9 | Princess Badiya Bint Ali of Iraq | 99 | London, Great Britain |
| May 14 | Prince Phinda Dlamini of Swaziland | 72/73 | MediSun Clinic, Ezuwlini, Swaziland |
| May 14 | Princess María Inmaculada of Bourbon-Two Sicilies | 82 | Mallorca, Spain |
| May 17 (motorcycle accident) | Otto Prinz und Landgraf von Hessen | 55 | BAB A96 between Wangen-West and Weißensberg, Germany |
| May 18 | Friedrich-Alexander Hoppe (Castell-Rüdenhausen) | 52 | |
| May 31 | Bernd Rosemeyer (Castell-Rüdenhausen) | 82 | |
| June 1 | Princess Elisabeth zu Sayn-Wittgenstein-Hohenstein geb. Freiin von Zedlitz und Leipe | 83 | Hof Breitenbach, Bad Laasphe, Germany |
| June 4 | Prince Saud bin Abdullah bin Faisal bin Abdulaziz Al Saud of Saudi Arabia | ||
| June 10 | Baroness Elizabeth-Ann de Massy (Monaco) | 72 | Centre Hospitalier Princesse Grace, Monte-Carlo, Monaco |
| June 11 | Princess Nalini Rajya Laxmi Devi Singh of Nepal, Rajmata of Poonch | 95 | New Delhi, India |
| June 26 | Teresa de Orleans e Bragança née de Cesar Leite (Brazil) | 91 | Rio de Janeiro, Brazil |
| June 28 | Prince Bandar bin Saad bin Mohammad bin Abdulaziz bin Saud bin Faisal Al Saud of Saudi Arabia | ||
| July 6 (covid-19) | Count Johannes von Mirbach-Geldern-Egmont, Prince zu Hohenlohe-Jagstberg | 80 | |
| July 7 | Prince Khalid bin Saud bin Abdulaziz Al Saud of Saudi Arabia | Abroad | |
| July 8 (Covid-19) | AmaRharhabe Queen Noloyiso Sandile (Zulu, South Africa) | 56 | Cecilia Makiwane Hospital, Mdantsane township of East London, Eastern Cape, South Africa |
| July 9 | Sheikh Ahmed bin Sultan Al Qasimi, Deputy Ruler of Sharjah (UAE) | 71/72 | London, Great Britain |
| July 12 | Princess Bharati Rajya Laxmi Devi Shah of Nepal, Rajmata of Mayurbhanj | 93 | Belgadia Palace, India |
| July 18 | Sheikh Nasser Al-Humoud Al-Jaber Al-Sabah of Kuwait | 89 | |
| July 22 | Sultan Sepuh XIV of Kasepuhan | 54 | |
| July (burial 23-7) | Princess Madawi bint Abdullah bin Muhammad Ibn Jalawi Al Saud of Saudi Arabia | ||
| July 25 | Prince Sisowath Samyl Monipong of Cambodia | 79 | |
| July (burial 27-7) | The mother of Prince Faisal bin Abdullah bin Nasser bin Abdulaziz Al Saud of Saudi Arabia | ||
| August 2 (covid-19) | Prince Tshekedi Dlamini of Swaziland | Private clinic, Swaziland | |
| August 11 | Prince Waldemar zu Schaumburg-Lippe | 79 | Los Angeles, CA, USA |
| August 13 | Príncipe Dom Eudes de Orleans e Bragança (Brazil) | 81 | Rio de Janeiro, Brazil |
| August 16 (covid-19) | Princess Ngabisa Dlamini of Swaziland | Lubombo Referal Hospital, Swaziland | |
| August 20 | Hon. Desmond Guinness (Urach, Württemberg) | 88 |
