There are currently 29 Kingdoms in the World today, including Thailand. 25 of 28 Kingdoms sent representatives to the Diamond Jubilee Celebration in Bangkok. The 28 Kingdoms are listed below, listed in alphabetical order. Of the listed countries, 12 Rulers attended themselves as well as 7 Crown Princes and 3 consorts. The rest of the representations were of Royal blood.
  Country Current Monarchs (June 2006)   Representations at the Diamond Jubilee   Remarks
1
Bahrain His Majesty King Hamad bin 'Isa Al Khalifa   His Highness Shaikh Khalifa bin Salman Al Khalifa, Prime Minister   Arrived 10 June, Received by the PM, Stayed at the Oriental Hotel, Presided at the opening of L'Espace, a restaurant by the Oriental at Siam Paragon Shopping Complex 22 June.
2
Belgium His Majesty King Albert II and Queen Paola
His Royal Highness Crown Prince Philippe and Her Royal Highness Crown Princess Mathilde
Arrived 11 June, Received by the Crown Prince, Stayed at the Oriental Hotel, Visited Temple of Dawn by long-tailed boat 13 June, Departed 14 June 2006.
3
Bhutan His Majesty King Jigme Singye Wangchuck   His Royal Highness Jigme Khesar Namgyel Wangchuck, Crown Prince of Bhutan   Arrived 11 June, Received by Princess Sirindhorn, Stayed at the Royal Orchid Sheraton, Paid Courtesy calls on the Crown Prince, Princess Sirindhorn and Princess Chulabhorn and Shaikh Khalifa of Bahrain, Visited Phuket 16-18 June, Departed 20 June 2006.
4
Brunei Darussalam His Majesty Sultan Haji Hassanal Bolkiah Muizzaddin Waddaulah and Her Majesty Raja Isteri Pengiran Anak Hajah Saleha
  The Sultan and Raja Isteri attended   Arrived 11 June, Received by the Crown Prince, Stayed at the Oriental Hotel, Departed 14 June 2006.
5
Cambodia His Majesty Preah Bat Samdech Preah Baromneath Norodom Sihamoni, King of Cambodia     The King attended   Arrived 11 June, Received by the Crown Prince, Stayed at the Plaza Athenee, Departed 14 June 2006.
6 Denmark Her Majesty Queen Margrethe II and His Royal Highness Prince Henrik, the Prince Consort
  Prince Henrik, the Prince Consort, attended   Arrived 11 June, Received by Princess Sirindhorn River Cruise 11 June, Stayed at the Oriental Hotel, Departed 14 June 2006.
7 Japan His Imperial Majesty Emperor Akihito and Her Imperial Majesty Empress Michiko
  The Emperor and Empress attended   Arrived 11 June, Received by the Crown Prince, Stayed at the Park Nai Lert Raffles, Visited Chulalongkorn University 12 June and Ayutthaya 14 June, Departed 15 June 2006.
8 Jordan His Majesty King Abdullah II Bin Al-Hussein and Her Majesty Queen Rania
  The King attended (with Prince Hamzah)   Arrive 12 June, Received by Princess Sirindhorn, Stayed at the Four Seasons, Departed 13 June 2006 after Reception at the Chakri Maha Prasat Throne Hall.
9 Kuwait His Highness Amir Sabah Al-Ahmad Al-Jaber Al-Sabah     The Amir attended   Arrived 11 June, Received by the Crown Prince, Stayed at the Inter-Continental, Departed 14 June 2006.
10 Liechtenstein His Serene Highness Prince Hans-Adams II and Her Serene Highness Princess Marie
His Serene Highness Hereditary Prince Alois   Arrived 11 June, Received by Princess Sirindhorn, Stayed at the Grand Hyatt Erawan, Visited the Grand Palace 11 June, Jim Thomson's House, National Museum and Suan Pakad Palace 13 June, and Ayutthaya 14 June, Departed 14 June 2006. First Visit to Thailand.
11 Lesotho His Majesty King Letsie III and Her Majesty Queen Masenate Mohato Seeiso
  The King and Queen attended   Arrived 11 June, Received by Princess Sirindhorn, Visited Chiang Mai 14 June, Departed 17 June 2006. First Visit to Thailand.
12 Luxembourg His Royal Highness Grand Duke Henri I and Her Royal Highness Grand Duchess Maria Teresa
  The Grand Duke attended.   Arrived 11 June, Received by Princess Sirindhorn, Stayed at the Shangri-La Hotel,Visited Temple of Dawn by long-tailed boat 13 June, Departed 14 June 2006.
13 Malaysia His Majesty Tuanku Syed Sirajuddin Ibni Al-Marhum Tuanku Syed Putra Jamalullail, The Yang di-Pertuan Agong XII and Her Majesty Tuanku Fauziah binti Al-Marhum Tengku Abdul Rashid, The Raja Permaisuri Agong
  The King and Queen attended   Arrived 11 June, Received by the Crown Prince, Stayed at the Shangri-La Hotel, Departed 14 June 2006.
14 Monaco His Serene Highness Prince Albert II     The Prince Albert attended   Arrived Chiang Mai 11 June, Bangkok 12 June, Received by a deputy PM, Stayed at the Grand Hyatt Erawan, Visited Jim Thompson's House 13 June, Departed 14 June 2006.
15 Morocco His Majesty King Mohammed VI and Her Royal Highness Princess Lalla Salma, Consort of His Majesty the King of Morocco
  The Princess Lalla Salma attended   Arrived 9 June, Received by a deputy PM, Stayed at the Sukhothai Hotel, Departed 14 June 2006.
16 Nepal His Majesty King Gyanendra Bir Bikram Shah Dev and Her Majesty Queen Komal Rajya Laxmi Devi Shah
  Did not send representation   The King and Queen of Nepal were going to attend the Celebrations, but had to cancel due to problems in Nepal.
17 Netherlands Her Majesty Queen Beatrix and His Royal Highness the late Prince Claus, the Prince Consort His Royal Highness Crown Prince Willem-Alexander, the Prince of Orange and Her Royal Highness Princess Máxima
Arrived 12 June, Received by Princess Sirindhorn, Stayed at the Shangri-La Hotel, Visited Temple of Dawn by long-tailed boat 13 June, Departed 14 June 2006.
18 Norway His Majesty King Harald V and Queen Sonja
His Royal Highness Crown Prince Haakon and Her Royal Highness Crown Princess Mette-Marit
Arrived 11 June, Received by Princess Sirindhorn, Stayed at the Sheraton Grande Sukhumvit, Visited Temple of Dawn by long-tailed boat 13 June, Departed 14 June 2006. Brought along their infant son, Prince Sverre Magnus.
19 Oman His Majesty Sultan Qaboos bin Sa'id Al ‘Bu Sa'id   His Highness Sayyid Shihab bin Tariq Taimour Al Said (Advisor to the Sultan)   Arrived 11 June, Received by the Crown Prince, Stayed at the Shangri-La Hotel, Departed 14 June 2006.
20 Qatar His Highness Sheikh Hamad Bin Khalifa Al-Thani and Her Highness Sheikha Moza Bin Nasir Al-Musnad
  The Sheikh and Sheikha attended   Arrived 11 June, Received by the Crown Prince, Stayed at the Peninsula, Departed 13 June 2006 after the Royal Banquet.
21 Samoa His Highness Malietoa Tanumafili II     Did not send representation.    
22 Saudi Arabia His Majesty King Abdullah     Did not send representation.    
23 Spain His Majesty King Juan Carlos I and Her Majesty Queen Sophia
  The Queen attended   Arrived 12 June, Received by Princess Sirindhorn, Stayed at the Oriental Hotel, Conferred a Spanish Decoration on HM the King 13 June, Departed 15 June 2006.
24 Swaziland His Majesty King Mswati III and Her Royal Highness Princess Inkhosikati LaDube, the Royal Consort of His Majesty King Mswati III
  The King attended with Princess Inkhosikati LaDube   Arrived 11 June, Received by the Crown Prince, Stayed at the Conrad Hotel,Visited SUPPORT foundation at Chitralada Villa 14 June, Departed 14 June 2006.
25 Sweden His Majesty King Carl XVI Gustaf and Her Majesty Queen Silvia
  The King and Queen attended   Arrived 12 June, Received by Princess Sirindhorn, Stayed at the Oriental Hotel, Visited Phuket 14-20 June, Presented Scouts Award to HM the King, Departed 21 June 2006.
26 Tonga His Majesty King Taufa'ahau Tupou IV
  His Royal Highness Crown Prince Tupouto'a   Arrived 11 June, Received by Princess Sirindhorn, Stayed at the Grand Hyatt Erawan, River Cruise 14 June, Departed 14 June 2006.
27 United Arab Emirates His Highness Sheikh Khalifa bin Zayed Al Nahyan, Ruler of Abu Dhabi, President of the United Arab Emirates   His Highness General Sheikh Mohammed Bin Zayed Al Nahyan, Crown Prince of Abu Dhabi, and Deputy Supreme Commander of the UAE Armed Forces   Arrived 12 June, Received by a deputy PM, Departed afternoon 13 June 2006 before the Royal Banquet.
28 United Kingdom Her Majesty Queen Elizabeth II and His Royal Highness Prince Philip, Duke of Edinburgh
His Royal Highness Prince Andrew, The Duke of York   Arrived 7 June, Received by the PM, Stayed at the Grand Hyatt Erawan, Departed 13 June 2006 after the Royal Banquet.