Last modified: 1 January 2023
Deaths in reigning and non-reigning royal houses of the year 2013.
* = New
| Date | Name | Age | Place |
| 3 January | Prince Naif bin Abdul Aziz bin Muhammad of Saudi Arabia | 23 | |
| 6 January | Gabriele Geier née Brougier (Solms-Rödelheim und Assenheim) | 94 | München, Germany |
| 8 January | George Howard Jacobus (Hohenlohe-Waldenburg-Schillingsfürst) | 82 | Delray Beach, Florida, USA |
| 12 January | Sheikh Abdullah bin Rashid Al Nuaimi of Ajman (UAE) | ||
| 14 January | Princess Aida Desta (Ethiopia) | 85 | USA |
| 15 January | Princess Margarita von Baden | 80 | Farnham, UK |
| 15 January | Gina, Maharani Narayan of Cooch Behar (India) | Spain | |
| 17 January | Count Albert Germanus von Rechberg | 99 | |
| January | Prince Irakli Grigolis Bagrationi (Georgia) | ||
| 8 February | Prince Otto zu Windisch-Graetz | 84 | |
| 10 February | Baron Fielakepa (Tonga) | 51 | Auckland, New Zealand |
| 10 February (?) | Sheikh Nasser bin Nasser bin Khalifa Al Thani of Qatar | ||
| 12 February | Prince Sattam bin Abdul Aziz Al Saud of Saudi Arabia | 71 | |
| 13 February (?) | The mother of Sheikh Butti bin Suhail Al Maktoum of Dubai | ||
| 14 February | Robert Folger Miller (Wurmbrand-Stuppach) | 90 | Hillsborough, California, USA |
| 3 March | Count Eberhard von Waldburg zu Zeil und Trauchburg | 72 | |
| 7 March | Prince Karl Christian zur Lippe-Weissenfeld | 82 | |
| 8 March | Countess Isabelle Adrienne van Aldenburg Bentinck, Countess zu Ortenburg | 87 | Middachten Castle, De Steeg, The Netherlands |
| 10 March | Princess Lilian of Sweden, Duchess of Halland née Davies | 97 | Villa Solbacken, Stockholm, Sweden |
| 10 March | Anita Lobkowicz-Charles née Princess Lobkowicz | 75 | Saint-Luperce, Eure-et-Loir, France |
| 21 March | Prince Clemens von Croÿ | 78 | |
| 1 April | Prince Badr bin Abdulaziz Al Saud of Saudi Arabia | ||
| 3 April | Princess Amalie zu Schwarzenberg née Princess Lobkowicz | 92 | Vienna, Austria |
| 12 April | Princess Elisabeth von Hessen née Bönker | 69 | |
| 4 May | Editha Schimert née Princess von Bayern | 88 | München, Germany |
| 8 May | Fürstin Eva-Benita zu Schaumburg-Lippe née Freiin von Tiele-Winckler | 84 | |
| 9 May | Prince Mohammed bin Abdullah bin Jalawi of Saudi Arabia | ||
| 18 May | Princess Elisabeth zu Solms-Braunfels née Princess zur Lippe | 97 | Baden-Baden, Germany |
| 23 May | Landgrave Moritz von Hessen | 86 | Frankfurt am Main, Germany |
| 26 May | Count Peter Wolff Metternich zur Gracht (Salm-Reifferscheidt-Krautheim und Dyck) | 84 | |
| 29 May | Prince Mahdi Al-Senussi of Libya | 57 | Benghazi, Libya |
| 30 May | Count Albrecht von Rechberg | 92 | |
| 3 June | Prince Alfred of Prussia | 88 | San José, Costa Rica |
| 3 June | Princess Charlotte de Looz-Corswarem | 89 | Attert, Belgium |
| 19 June | Princess Leylâ of Afghanistan née Tarzi | 80 | Genève, Switzerland |
| 21 June | Prince Abdol Aziz Farman-Farmaian (Persia) | 93 | Palma de Mallorca, Spain |
| 1 July | Louise Strandberg née Brooks (Lobkowicz) | 80 | Maine Coast Memorial Hospital, Ellsworth, Maine, USA |
| 2 July | Princess Fawzia of Egypt | 91 | Alexandria, Egypt |
| 16 July | Sheikha Fatima bint Ali bin Huwaidin Al Kutbi of Ajman (UAE) | ||
| 17 July | Count Mathias Khuen von Belasi (Hohenlohe-Langenburg) | 79 | Heidelberg, Germany (?) |
| 25 July | Margarita Klien, Princess von und zu Liechtenstein | 63 | Triesenberg, Liechtenstein |
| 28 July | Princess Vacheahra Norodom of Cambodia | 66 | Neuilly-sur-Seine, Hauts-de-Seine, France |
| 10 August | Countess Christa zu Erbach-Erbach née Blösinger | 65 | |
| 12 August | Prince Friso van Oranje-Nassau (The Netherlands) | 44 | Huis ten Bosch Palace, The Hague, The Netherlands |
| 12 August | Don Gonzalo Fernández de Córdova y Larios, Duque de Arión, Grande de España (Hohenlohe-Langenburg) | 79 | Madrid, Spain |
| 13 August | Sonatane Tu’akinamolahi Taumopeau Tupou, Lord Taumoepeau-Tupou of Toula and Kotu (Tonga) | 70 | Viaola Hospital, Nuku’alofa, Tonga |
| 18 August | Marie-Valerie Studt née Countess zu Stolberg-Stolberg | 55 | |
| 19 August | Prince Musaed bin Abdulaziz Al Saud of Saudi Arabia | ||
| 26 August | Helmut Häferer (Croÿ-Solre) | 68 | Montmorillon, Vienne, France |
| 16 September | Sheikha Alia bint Mohammed Al Qasimi of Sharjah (UAE) | ||
| 23 September | Faralda Angela Meyn née Countess von Schlitz genannt von Görtz | 79 | |
| 2 October | Princess Roswitha von Sachsen-Coburg und Gotha née Breuer | 68 | Coburg, Germany |
| 2 October | Princess Juliane zu Bentheim und Steinfurt | 80 | Münster, Germany |
| * 16 October | Princess Natalie zu Windisch-Graetz | 96 | Vienna, Austria |
| 20 October | Jamalul Kiram III Sultan of Sulu and North Borneo | 75 | Philippine Heart Center, Philippines |
| 8 November | Count Hubert von Waldburg zu Wolfegg und Waldsee | 57 | |
| 10 November | Duchess Elena von Leuchtenberg | 91 | Bussy-en-Othe, Yonne, France |
| 14 November | Count Gebhard von Waldburg zu Wolfegg und Waldsee | 82 | München, Germany |
| 15 November | Fürstin Sylvia zu Bentheim und Steinfurt née Countess von Pückler | 83 | Münster, Germany |
| 17 November | Andreas Freiherr von Lederer (Salm-Reifferscheidt-Raitz) | 80 | |
| 19 November | Duchess Olga von Leuchtenberg née Wickberg | 87 | USA |
| 23 November | Baron Maximilien de Watteville-Berckheim (Hohenlohe-Bartenstein) | 73 | |
| 23 November | Countess Tina von Platen Hallermund née Freiin von Dürfeld | 64 | |
| 25 November | Prince Rodolphe de Croÿ-Roeulx | 89 | Rhode-Saint-Genèse, Belgium |
| 10 December | Maharaja Srikanta Datta Narasimharaja Wadiyar of Mysore (India) | 60 | Bangalore, India |
| 16 December | Uhtradom Thirunal Marthanda Varma, titular Maharaja of Travancore | 91 | |
| Exact date unknown | Duke Egilmar von Oldenburg | 78 or 79 |