Thailand (officially the Kingdom of Thailand), formerly known as Siam, is a country at the centre of the Indochina peninsula in Southeast Asia. It is bordered to the north by Burma and Laos, to the east by Laos and Cambodia, to the south by the Gulf of Thailand and Malaysia, and to the west by the Andaman Sea and the southern extremity of Burma. Its maritime boundaries include Vietnam in the Gulf of Thailand to the southeast, and Indonesia and India on the Andaman Sea to the southwest.
Thailand is a monarchy headed by King Bhumibol Adulyadej, Rama IX, and governed by a military junta that took power in May 2014. The king is the ninth of the House of Chakri, and has reigned since 1946 as the world's longest-serving current head of state and the country's longest-reigning monarch. The King of Thailand's titles include Head of State, Head of the Armed Forces, Adherent of Buddhism, and Upholder of religions. Although a constitutional system was established in 1932, the monarchy and military have continued to intervene periodically in politics.
|Reign / Rule||From||To||Coins Issued|
|พระพุทธยอดฟ้าจุฬาโลก (Phra Phutthayotfa Chulalok, King Rama I)||6 April 1782||7 September 1809|
|พระพุทธเลิศหล้านภาลัย (Phra Phutthaloetla Naphalai, King Rama II)||7 September 1809||21 July 1824|
|นั่งเกล้า (Nangklao, King Rama III)||21 July 1824||2 April 1851|
|พระจอมเกล้าเจ้าอยู่หัว (Mongkut, King Rama IV)||2 April 1851||1 October 1868|
|พระจุลจอมเกล้าเจ้าอยู่หัว (Chulalongkorn, King Rama V)||1 October 1868||23 October 1910|
|พระมงกุฎเกล้าเจ้าอยู่หัว (Vajiravudh, King Rama VI)||23 October 1910||25 November 1925|
|พระปกเกล้าเจ้าอยู่หัว (Prajadhipok, King Rama VII)||25 November 1925||2 March 1935|
|อานันทมหิดล (Ananda Mahidol, King Rama VIII)||2 March 1935||9 June 1946|
|ภูมิพลอดุลยเดช (Bhumibol Adulyadej, King Rama IX)||9 June 1946||13 October 2016|
|มหาวชิราลงกรณ (Maha Vajiralongkorn, King Rama X)||13 October 2016|