List of monarchs of Thailand

This article lists the monarchs of Thailand from the foundation of the Sukhothai Kingdom in 1238 until the present day.

The Royal Standard of the King of Thailand. The Garuda in the center has been the symbol of the monarchy since the times of Ayutthaya.

Sukhothai Kingdom

Phra Ruang dynasty (1238–1368; under Ayutthaya 1368–1438)

No.	Name	Birth	Reign from	Reign until	Notes
1	Pho Khun Si Inthrathit (Pho Khun Bang Klang Hao)	1188	1238	1270 (32 years) (82 years old)	• First Pho Khun (Lord) of Thailand • First ruler of Sukhothai
2	Pho Khun Ban Mueang	c. 1237	1270	1279 (9 years) (42 years old)	• Son of Si Inthrathit
3	Pho Khun Ram Khamhaeng the Great (Pho Khun Ramarat)	c. 1237/1247	1279	1298 (19 years) (51/61 years old)	• Younger brother of Ban Mueang • First ruler of Thailand with the title of Maharat (the Great)
4	Phaya Loe Thai	c. 1262	1298	1323 (25 years) (61 years old)	• Son of Ram Khamhaeng the Great • First Phaya (Governor) of Thailand
5	Phaya Ngua Nam Thum	c. 1266	1323	1347 (24 years) (81 years old)	• Cousin of Loe Thai
6	Phaya Li Thai (Phra Maha Thammaracha I)	c. 1300	1347	1368 (21 years) (68 years old)	• Cousin of Ngua Nam Thum • First Phra (King) of Thailand
Under the suzerainty of the Kingdom of Ayutthaya
7	Phaya Lue Thai (Phra Maha Thammaracha II)	?	1368	1399 (31 years)	• Son of Li Thai
8	Phaya Saileuthai (Phra Mahathammaracha III)	?	1400	1419 (19 years)	• Son of Luethai
9	Phaya Borommapan (Phra Mahathammaracha IV)	?	1419	1438 (19 years)	• Son of Sailuethai

Ayutthaya Kingdom

1st Uthong dynasty (1350–1370)

No.	Portrait	Name	Birth	Reign from	Reign until	Death	Notes
1		Somdet Phra Chao Uthong (Somdet Phra Ramathibodi I)	1314	1350	1369 (20 years)		• First King of Ayutthaya
2		Somdet Phra Ramesuan	1339	1369	1370 (less than one year) (abdicated)	1395	• Son of Uthong

1st Suphannaphum dynasty (1370–1388)

No.	Portrait	Name	Birth	Reign from	Reign until	Death	Notes
3		Somdet Phra Borommarachathirat I (Khun Luang Pha Ngua)	?	1370	1388 (18 years)		• Husband of Uthong's older sister • Usurper • Former Lord of Suphanburi
4		Somdet Phra Chao Thong Lan (Chao Thong Chan)	?	1388 (7 days) (usurped)			• Son of Borommarachathirat I

2nd Uthong dynasty (1388–1409)

No.	Portrait	Name	Birth	Reign from	Reign until	Death	Notes
(2)		Somdet Phra Ramesuan	1339	1388	1395 (7 years)		• Former King reclaiming the throne • Son of Uthong
5		Somdet Phra Ramrachathirat	1356	1395	1409 (14 years) (usurped)	?	• Son of Ramesuan

2nd Suphannaphum dynasty (1409–1569)

No.	Name	Birth	Reign from	Reign until	Notes
6	Somdet Phra Intharacha I (Phra Chao Nakhon In)	1359	1409	1424 (15 years)	• Son of Borommarachathirat I • Former Lord of Suphanburi, offered crown
7	Somdet Phra Chao Sam Phraya (Somdet Phra Borommarachathirat II)	?	1424	1448 (24 years)	• Son of Inthracha I
8	Somdet Phra Borommatrailokkanat	1431	1448	1488 (40 years)	• Son of Borommarachathirat II
9	Somdet Phra Borommarachathirat III (Intharacha II)	?	1488	1491 (3 years)	• Son of Borommatrailokkanat
10	Somdet Phra Ramathibodi II (Chettathirat I)	1473	1491	1529 (38 years)	• Younger brother of Borommarachathirat III • Son of Borommatrailokkanat
11	Somdet Phra Borommarachathirat IV (Borommarachathirat No Phutthangkun) (Phra Athittayawong)	?	1529	1533 (4 years)	• Son of Ramathibodi II
12	Phra Ratsadathirat	1529	1533 (4 months) (usurped)		• Son of Borommarachathirat IV • Child King, reign under regency
13	Somdet Phra Chairacha (Chairachathirat) (Phra Chai)	?	1533	1546 (13 years)	• Uncle of Ratsadathirat • Son of Ramathibodi II • Usurper
14	Phra Yotfa (Phra Kaeofa)	1535	1546	1548 (2 years) (usurped)	• Son of Chairacha
-	Khun Worawongsathirat (Khun Chinnarat) (Bun Si)	?	11 November 1548 (42 days) (removed)		• Usurper monarch, not accepted by some historians
15	Somdet Phra Maha Chakkraphat (Phra Chao Chang Phueak) (Phra Thianracha)	1509	1548	1564 (16 years)	• Son of Ramathibodi II • Younger brother of Borommarachathirat IV and Chairacha • Seized the throne from usurper • Became a Buddhist monk at Pegu (1564–1568)
First Fall of Ayutthaya
Vassal of Burma (1564–1568)
16	Somdet Phra Mahinthrathirat	1539	1564	1569 (4 years as vassal king, 1 year as king)	• Son of Maha Chakkraphat and Queen Suriyothai
Vassal of Burma (1569–1584)

Sukhothai dynasty (1569–1629)

No.	Name	Birth	Reign from	Reign until	Notes
17	Somdet Phra Mahathammarachathirat (Sanphet I)	1517	1569	29 July 1590 (21 years)	• Former Lord of Phitsanulok • Son-in-law of Maha Chakkraphat and Queen Suriyothai • Installed as vassal of Bayinnaung of Burma, declared independence in 1584
18	Somdet Phra Naresuan the Great (Sanphet II) (Phra Naret)	25 April 1555	29 July 1590	7 April 1605 (15 years)	• Son of Mahathammarachathirat
19	Somdet Phra Ekathotsarot (Sanphet III)	1557	25 April 1605	1620 (15 years)	• Brother of Naresuan • Son of Mahathammarachathirat
20	Somdet Phra Si Saowaphak (Sanphet IV)	?	1620 (less than a year) (usurped)		• Son of Ekathotsarot
21	Somdet Phra Songtham (Borommaracha I)	1590	1620	12 December 1628 (8 years)	• Son of "Ekathotsarot", invited to take the throne after leaving the Sangha
22	Somdet Phra Chetthathirat (Borommaracha II)	c. 1613	1628	1628–1629 (1 year and 7 months) (usurped)	• Son of Songtham
23	Phra Athittayawong	1618	1629 (36 days) (usurped)		• Younger brother of Chetthathirat • Son of Songtham

Prasat Thong dynasty (1629–1688)

No.	Name	Birth	Reign from	Reign until	Notes
24	Somdet Phra Chao Prasat Thong (Sanphet V)	1599	1629	1656 (27 years)	• Usurper, formerly the Kalahom • Rumored to be a son of Ekathotsarot
25	Somdet Chao Fa Chai (Sanphet VI)	?	1656 (9 months) (usurped)		• Son of Prasat Thong
26	Somdet Phra Si Suthammaracha (Sanphet VII)	?	June 1656	26 October 1656 (2 months 17 Days) (usurped)	• Usurper, Uncle of Chao Fa Chai • Younger brother of Prasat Thong
27	Somdet Phra Narai the Great (Ramathibodi III)	16 February 1633	26 October 1656	11 July 1688 (32 years)	• Usurper, nephew of Si Suthammaracha • Son of Prasat Thong • Half-brother of Chao Fa Chai

Ban Phlu Luang dynasty (1688–1767)

No.	Name	Birth	Reign from	Reign until	Death	Notes
28	Somdet Phra Phetracha	1632	1688	1703 (15 years)		• Former commander of the Royal Elephant Corps
29	Somdet Phra Suriyenthrathibodi (Sanphet VIII) (Phra Chao Suea)	?	1703	1709 (7 years)		• Son of Phetracha
30	Somdet Phra Chao Yu Hua Thai Sa (Sanphet IX)	1679	1709	1733 (24 years)		• Son of Suriyenthrathibodi
31	Somdet Phra Chao Yu Hua Borommakot (Borommarachathirat V)	1680	1733	1758 (26 years)		• Brother of Thai Sa, Former Front Palace • Son of Suriyenthrathibodi
32	Somdet Phra Chao Uthumphon (Borommarachathirat VI) (Khun Luang Ha Wat)	?	1758 (2 months) (usurped)		1796	• Son of Borommakot • Former Front Palace
33	Somdet Phra Chao Ekkathat (Phra Thinang Suriyat Amarin) (Borommaracha III)	?	1758	7 April 1767 (9 years) (removed)	17 April 1767	• Usurper, brother of Uthumphon • Son of Borommakot
Second Fall of Ayutthaya

Thonburi Kingdom

Thonburi dynasty (1768–1782)

No.	Portrait	Name	Birth	Reign from	Coronation	Reign until	Death	Notes
1		Taksin the Great (Phra Chao Krung Thonburi) (Borommaracha IV)	17 April 1734	6 November 1767	28 December 1768	6 April 1782 (14 years) (removed)	7 April 1782 (47 years old) (executed)	• Only King of Thonburi Period

Rattanakosin Kingdom and Kingdom of Thailand (1782–present)

Chakri dynasty (1782–present)

No.	Name	Birth	Reign from	Coronation	Reign until	Death	Notes
1	Phrabat Somdet Phra Paramoruracha Maha Chakri Boromanat Phra Phutthayotfa Chulalok the Great (Rama I)	20 March 1737	6 April 1782	10 June 1782	7 September 1809 (27 years) (72 years old)		• First King of Rattanakosin • Friend and Father-in-law of Taksin
2	Phrabat Somdet Phra Boromratchapongchet Mahetsawarasunthon Phra Phutthaloetla Naphalai (Rama II)	24 February 1767	7 September 1809		21 July 1824 (14 years) (57 years old)		• Son of Rama I and Queen Amarindra
3	Phrabat Somdet Phra Paramathiworaset Maha Jessadabodindra Phra Nang Klao Chao Yu Hua (Rama III) (Phra Maha Jesataraj Chao)	31 March 1788	21 July 1824		2 April 1851 (26 years) (63 years old)		• Son of Rama II and Princess Consort Sri Sulalai
4	Phrabat Somdet Phra Paramenthra Ramathibodhi Srisindra Maha Mongkut Phra Chom Klao Chao Yu Hua (Rama IV) Phra Syamadevamahamakut Vidyamaharaj[1]	18 October 1804	2 April 1851	6 April 1851 (1st time) 15 May 1851 (2nd time)	1 October 1868 (17 years) (63 years old)		• Half-brother of Rama III • Son of Rama II and Queen Sri Suriyendra
5	Phrabat Somdet Phra Paraminthra Maha Chulalongkorn Phra Chulachomklao Chao Yu Hua the Great (Rama V) (Phra Piya Maharaj)	20 September 1853	1 October 1868	11 November 1868 (1st time) 16 November 1873 (2nd time)	23 October 1910 (42 years) (57 years old)		• Son of Rama IV and Queen Debsirindra • Under Regency of Grand Duke Sri Suriyavongs from 1868–1873
6	Phrabat Somdet Phra Paramenthra Maha Vajiravudh Phra Mongkut Klao Chao Yu Hua (Rama VI) (Phra Maha Dhiraraj Chao)	1 January 1881	23 October 1910	11 November 1911	26 November 1925 (15 years) (44 years old)		• Son of Rama V and Queen Saovabha Phongsri
7	Phrabat Somdet Phra Paraminthra Maha Prajadhipok Phra Pok Klao Chao Yu Hua (Rama VII)	8 November 1893	26 November 1925	25 February 1926	2 March 1935 (9 years) (abdicated)	30 May 1941 (47 years old)	• Younger brother of Rama VI • Son of Rama V and Queen Saovabha Phongsri
8	Phrabat Somdet Phra Paramenthra Maha Ananda Mahidol Phra Atthama Ramathibodin (Rama VIII)	20 September 1925	2 March 1935	—	9 June 1946 (11 years) (20 years old)		• Nephew of Rama VII • Grandson of Rama V by Mahidol Adulyadej • Under Regency from 1935–1946
The country's name was changed from Siam to Thailand in 1939
9	Phrabat Somdet Phra Boromchanakathibet Maha Bhumibol Adulyadej Maharaj Borommanatbophit (Rama IX) (Somdet Phra Phatthara Maharat, Somdet Phra Maha Bhumibol Adulyadej Maharat)	5 December 1927	9 June 1946	5 May 1950	13 October 2016 (70 years 126 days) (88 years old)		• Younger brother of Rama VIII • Grandson of Rama V by Mahidol Adulyadej
10	Phrabat Somdet Phra Paramenthra Ramathibodhi Srisindra Maha Vajiralongkorn Phra Vajira Klao Chao Yu Hua (Rama X)	28 July 1952	13 October 2016	4 May 2019[2]	Present (Incumbent: 3 years, 254 days) (67 years old)		• Only son of Rama IX and Queen Sirikit • 2nd child of Rama IX

Timeline of monarchs

Notes

"ในหลวง-พระราชินี ทรงบำเพ็ญพระราชกุศลทักษิณานุปทานวันพระบรมราชสมภพและถวายพระราชสมัญญา ร.4 พระสยามเทวมหามกุฏวิทยมหาราช". ผู้จัดการออนไลน์. 2019-10-18. Retrieved 2019-10-18.
"Thai king to be crowned in coronation ceremonies May 4-6 - palace". euronews. 1 January 2019. Retrieved 12 November 2019.

Bibliography

Prince Chula Chakrabongse, HRH (1967). Lords of Life: A History of the Kings of Thailand. United Kingdom: Alvin Redman Limited.
Prince Damrong Rajanubhab, Disuankumaan (2001). Our Wars With The Burmese: Thai-Burmese Conflict 1539-1767. Thailand: White Lotus Co. Ltd. ISBN 974-7534-58-4.
Princess Maha Chakri Sirindhorn Foundation (2011). Directory of Thai kings (Thai: นามานุกรมพระมหากษัตริย์ไทย) (PDF). Thailand: www.nanmeebooks.com. ISBN 978-616-7308-25-8. Archived from the original (PDF) on 4 March 2012. Retrieved 8 January 2012.
Royal Institute of Thailand (2002). "Chronology of the Kings of Ayutthaya". Archived from the original on 3 December 2013. Retrieved 8 January 2012.
Wood, William A. R. (1924). History of Siam. Thailand: Chalermit Press. ISBN 1-931541-10-8.

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[1] "ในหลวง-พระราชินี ทรงบำเพ็ญพระราชกุศลทักษิณานุปทานวันพระบรมราชสมภพและถวายพระราชสมัญญา ร.4 พระสยามเทวมหามกุฏวิทยมหาราช". ผู้จัดการออนไลน์. 2019-10-18. Retrieved 2019-10-18.

[2] "Thai king to be crowned in coronation ceremonies May 4-6 - palace". euronews. 1 January 2019. Retrieved 12 November 2019.

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