This is a list of flags used in Thailand.

National flag

Flag	Date	Use	Description	Usage
	1917–present	Flag of Thailand	Five horizontal stripes of red, white, blue, white and red, the middle stripe twice as wide as the others. The flag colors were standardized in 2017	National flag

Royal flags

Royal standards

Flag	Date	Use	Description
	1911–	Royal Standard of the King of Thailand	A yellow plain square flag with a dancing red Garuda in the center. Usually mounted in front of the car boarded by the King.
	2019 –	Standard of Queen Sirikit the Queen Mother	Similar to the Royal Standard in the ratio of 2:3 with swallow-tail end and the royal monogram of Queen Sirikit at the canton.[1]
	1911–	Standard of the Queen of Thailand	King's Standard in ratio 2:3 with swallow-tailed end.
	1979–	Standard for Senior members of the royal family (created for the Princess Mother)	Queen's Standard in ratio 2:3 with swallow-tailed end. The blue middle square depicts the Royal Crown atop two bowls on a table flanked by two five-tiered royal umbrellas.
	1911–	Standard of the Crown Prince of Thailand.	Thai king's standard with blue border.
	2019 –	Standard of Princess Maha Chakri Sirindhorn	Dark blue rectangle with the ratio of 2:3 defaced with the Royal Standard. The flag is swallow-tail and has the royal monogram of Princess Maha Chakri Sirindhorn at the canton.[1]
	2019 –	Standard of Princess Chulabhorn Krom Phra Srisavangavadhana	Dark blue rectangle defaced with yellow circle. The circle features the red Garuda. At the canton of the blue field has the royal monogram of Princess Chulabhorn Walailak. The flag is swallow-tail[1]
	1911–	Standard for the Royal Consort of the Crown Prince of Thailand.	Blue 2:3 rectangle defaced with King's Standard. The flag is swallow-tailed.
	1911–	Standard for other princes in the Chakri dynasty.	Blue square defaced with yellow circle. The circle features red Garuda.
	1911–	Standard for other princesses in the Chakri dynasty.	Standard for the male royalties in ratio 2:3 with swallow-tailed end.
	1936–	Standard for the Regent of Thailand.	A white plain square flag with the Garuda and a shield depicting the National Flag in the center.

Personal royal flags

Flag	Date	Use	Description
	2016–present	Personal Flag of King Vajiralongkorn	Yellow flag (the King's birthday colour), the middle the depicts the Royal Cypher (ว.ป.ร.: มหาวชิราลงกรณ ปรมราชาธิราช : Mahavajiralongkorn Paramarajadhiraja (Thai equivalent to Vajiralongkorn Rex), topped by the Great Crown of Victory, in between is the Thai numeral of 10.
	1946–2016	Personal flag of King Bhumibol Adulyadej	Yellow flag (the King's birthday colour), the middle the depicts the royal cypher "ภ.ป.ร.", topped by the Great Crown of Victory, in between is the Thai symbol for the numeral 9, signifying his rule as Rama IX.
	1950–present	Personal Flag of Queen Mother Sirikit	Blue flag (the Queen's birthday colour), the middle the depicts the Royal Cypher (ส.ก.: สิริกิติ์ : Sirikit), the middle is Queen Sirikit's Royal Cypher, topped by the Great Crown of Victory.
	2019–present	Personal Flag of Queen Suthida	Purple flag (the Queen's birthday colour), the middle the depicts the Royal Cypher (ส.ท.: สุทิดา : Suthida), the middle is Queen Suthida's Royal Cypher, topped by the Great Crown of Victory.
	1977–present	Personal Flag of Princess Maha Chakri Sirindhorn	Purple flag (the Princess' birthday colour), the middle the depicts the Royal Cypher (ส.ธ.: สิรินธร : Sirindhorn), the middle is the Royal Cypher, topped by the simplified crown.
	1982–present	Personal Flag of Princess Chulabhorn Walailak	Orange flag (the Princess' birthday colour), the middle the depicts the Royal Cypher (จ.ภ.: จุฬาภรณวลัยลักษณ์ : Chulabhorn), the middle is the Royal Cypher, topped by the simplified crown.
	2001–present	Personal Flag of Princess Ubolratana Rajakanya	Red flag (the Princess' birthday colour), the middle the depicts the Royal Cypher (อ.ร.: อุบลรัตนราชกัญญา : Ubolratana), the middle is the Royal Cypher, but not topped by the simplified crown.
	1977–present	Personal Flag of Princess Soamsawali	Purple flag (the Princess' birthday colour), the middle the depicts the Royal Cypher (ส.ส.: โสมสวลี : Soamsawali), the middle is the Royal Cypher, under the Buddhist/Hindu sacred sign of "Unalome".
	2019–present	Personal Flag of Princess Bajrakitiyabha	Orange flag (the Princess' birthday colour), the middle the depicts the Royal Cypher (พ.ภ.: พัชรกิติยาภา : Bajrakitiyabha), the middle is the Royal Cypher, topped by the simplified crown.
		Personal Flag of Princess Sirivannavari Nariratana	Orange flag (the Princess' birthday colour), the middle the depicts the Royal Cypher (ส.ร.: สิริวัณณวรีนารีรัตน์ : Sirivannavari), the middle is the Royal Cypher, topped by the simplified crown.
		Personal Flag of Prince Dipangkorn Rasmijoti	Blue flag (the Prince's birthday colour), the middle the depicts the Royal Cypher (ท.ป.: ทีปังกรรัศมีโชติ : Dipangkorn), the middle is the Royal Cypher, topped by the simplified crown.
	1982–present	Personal Flag of Princess Siribhachudabhorn	Blue flag (the Princess' birthday colour), the middle the depicts the Royal Cypher (ส.ภ.: สิริภาจุฑาภรณ์ : Siribhachudabhorn), the middle is the Royal Cypher, topped by the glowing tiara.
	2016–present	Personal Flag of Princess Aditayadornkitikhun	Purple flag (the Princess' birthday colour), the middle the depicts the Royal Cypher (อ.ก.: อทิตยาทรกิติคุณ : Aditayadornkitikhun), the middle is the Royal Cypher.

Royal Thai Government flags

Flag	Date	Use	Description
	1979–	Flag of the prime minister of Thailand	White flag in ratio 5:6 with the Prime Minister's seal under the royal crown.
	1936–	Flag of the defence minister of Thailand	White flag in ratio 5:6 with the Emblem of the Ministry of Defence in the center. The emblem consists of a red chakra (Army), the dark blue anchor (Navy) and the sky blue wings (Air Force).
	1979–	Flag of the president of the National Assembly of Thailand	White flag in ratio 5:6 with the National Assembly of Thailand's seal under the royal crown.
		Flag of the president of the Supreme Court of Thailand	White flag in ratio 5:6 with the Supreme Court of Thailand's seal under the royal crown.

Naval flags

Flag	Date	Use	Description
	1917–	Naval Jack	A national flag with the emblem of Royal Thai Navy in the center: a chakra inserted with an anchor under the Thai royal crown. The design is identical to Thai naval unit colours. Note that all Thai Army, Navy and Air Force unit colours called "Thong Chai Chalermphol" (ธงชัยเฉลิมพล [th]).
		Naval Ensign	A red disc containing a white elephant in regalia centred on the national flag.

Military flags

Flag	Date	Use	Description
	1979–	Royal Thai Armed Forces Headquarters Flag	Red, Navy blue and Sky blue flag with the emblem of Royal Thai Armed Forces: at the center of the tricolour is a badge of the Headquarters with a golden Chakra, with an anchor with golden chains and golden Wings, surrounded by a golden wreath. (from Flag law B.E.2522 (1979)).
		Royal Thai Army Flag	Red flag with the emblem of Royal Thai Army: a chakra under Unalom and the Thai royal crown with rays flanked by the wreaths (from Flag law B.E.2522 (1979)).
		Royal Thai Navy Flag	Navy blue flag with the emblem of Royal Thai Navy in the white circle (from Flag law B.E.2522 (1979)).
		Royal Thai Air Force Flag	Blue sky flag with the emblem of Royal Thai Air Force: wings with Unalom under the Thai royal crown and rays (from Flag law B.E.2522 (1979)).
		Flag for Chief of Defence Forces	Red, Navy blue and Sky blue flag with the emblem of Royal Thai Armed Forces with five stars underneath.
		Flag for Commander-in-Chief of the Royal Thai Army	Red flag with the emblem of Royal Thai Army with five stars underneath.
	1897–	Flag for Commander-in-Chief of the Royal Thai Navy	Navy blue flag with the emblem of Royal Thai Navy.
	1979–	Flag for Commander-in-Chief of the Royal Thai Air Force	Sky blue flag with yellow borders and the emblem of Royal Thai Air Force with a shield depicting the National flag.

Police flag

Flag	Date	Use	Description
	1958–	Royal Thai Police Headquarters	Maroon red flag with the emblem of the Thai National Police in the center.
	1979–	Pitak Santiraj flag	An honour flag of the Royal Thai Police according to the Thai Flag Act of B.E. 2522 (1979). It has the same characteristics and colors as the National Flag but in the centre of the flag is the coat of arms of Siam during the reign of King Chulalongkorn (Rama V), with the words "To Protect the People’s Peace" (พิทักษ์สันติราษฎร์ – pronounce "Pitak Santiraj") embroidered in silver metallic threads embracing the underside of the coat of arms.

Religious flags

Flag	Date	Use	Description
	1958–	The Dharmacakra flag—Buddhism	Yellow is color of Buddhism, the middle the depicts the Red Thammachak, symbol of The Buddhism Organizations and Buddhists in Thailand.

Diplomatic flags

Flag	Date	Use	Description
	1927–	Ambassador Standard of Thailand	A blue disc containing a white elephant in regalia centred on the national flag.
		Consular Flag of Thailand	Triranga surmounted with blue disc containing a white elephant.

Provincial flags

Flag	Date	Use	Description
		Flag of Amnat Charoen Province	Purple flag with the Seal of Amnat Charoen Province in the center.
		Flag of Ang Thong Province	Yellow, Green bicolor with yellow on top and green on the bottom with the Provincial Seal on the center.
		Flag of Bangkok	Green flag with the Seal of the Bangkok Metropolitan, in white at the center. Used by the Bangkok Metropolitan Administration and the Governor of Bangkok.
		Flag of Bueng Kan Province	Purple, White, purple with the center bar being wider than the purple bars with the Provincial Seal on the center.
		Flag of Buriram Province	Purple and Orange flag split in half vertically with the Purple on the left and the Orange on the right with the Provincial Seal in the center.
		Flag of Chachoengsao Province	Red flag with the Seal of Chachoengsao Province in the center.
		Flag of Chai Nat Province	Pink flag with the Provincial Seal in the center.
		Flag of Chaiyaphum Province
		Flag of Chanthaburi Province	The flag of Chanthaburi Province has a red background with the province seal.
		Flag of Chiang Mai Province
		Flag of Chiang Rai Province	The flag of Chiang Rai Province is a vertical tricolor band, two with blue and one with light purple and an elephant in the center.
		Flag of Chonburi Province
		Flag of Chumphon Province
		Flag of Kalasin Province
		Flag of Kamphaeng Phet Province
		Flag of Kanchanaburi Province
		Flag of Khon Kaen Province
		Flag of Krabi Province
		Flag of Lampang Province
		Flag of Lamphun Province
		Flag of Loei Province
		Flag of Lopburi Province
		Flag of Mae Hong Son Province
		Flag of Maha Sarakham Province
		Flag of Mukdahan Province
		Flag of Nakhon Pathom Province
		Flag of Nakhon Phanom Province
		Flag of Nakhon Ratchasima Province
		Flag of Nakhon Sawan Province
		Flag of Nakhon Si Thammarat Province
		Flag of Nan Province
		Flag of Narathiwat Province
		Flag of Nong Bua Lamphu Province
		Flag of Nong Khai Province
		Flag of Nonthaburi Province
		Flag of Pathum Thani Province
		Flag of Pattani Province
		Flag of Phang Nga Province
		Flag of Phatthalung Province
		Flag of Phayao Province
		Flag of Phetchabun Province
		Flag of Phetchaburi Province
		Flag of Phichit Province
		Flag of Phitsanulok Province
		Flag of Phra Nakhon Si Ayutthaya Province
		Flag of Phuket Province
		Flag of Prachin Buri Province
		Flag of Prachuap Khiri Khan Province
		Flag of Ranong Province
		Flag of Ratchaburi Province
		Flag of Rayong Province
		Flag of Roi Et Province
		Flag of Sa Kaeo Province
		Flag of Sakon Nakhon Province
		Flag of Samut Prakan Province
		Flag of Samut Sakhon Province
		Flag of Samut Songkhram Province
		Flag of Saraburi Province
		Flag of Satun Province
		Flag of Sing Buri Province
		Flag of Sisaket Province
		Flag of Songkhla Province
		Flag of Sukhothai Province
		Flag of Suphan Buri Province
		Flag of Surat Thani Province
		Flag of Surin Province
		Flag of Tak Province
		Flag of Trang Province
		Flag of Trat Province
		Flag of Ubon Ratchathani Province
		Flag of Udon Thani Province
		Flag of Uthai Thani Province
		Flag of Uttaradit Province
		Flag of Yala Province
		Flag of Yasothon Province

Historical flags

Flag	Date	Use	Description
	c. 1680–1782	Ensign of Siam	A red plain rectangular flag.
	1782–1817	State ensign of Siam	Red flag with a white chakra.
	1817–1832	State ensign of Siam	Red flag with a white elephant inside the chakra.
	1832–1916	Flag of Siam	A white elephant facing to the hoist in the red flag. Called in Thai language "Thong Chang" (ธงช้างเผือก)[2] (the elephant flag). Commonly attributed to Rama IV's reign but was first implemented during the reign of Rama III.[3]
	1916–1917	State flag and ensign of Siam	Red flag with a white elephant in regalia.
	1917	Former flag of Siam	Five horizontal stripes flag like the Trairanga but the middle stripe is red. It is currently used by several anti-monarchists due to its ommitance of the colour blue which symbolizes the monarchy.

Naval jacks

Flag	Date	Use	Description
	1881–1897	Naval Ensign of Siam	Red flag with a white elephant in regalia, with a white Chakra at the top corner.
	1898–1912	Naval Ensign of Siam	Red flag with a white elephant in regalia.
	1912–1917	Naval Ensign of Siam	Red flag with a white elephant in regalia, with the emblem of the Royal Thai Navy at the top corner.
	1855–1881	Naval Jack of Siam	Blue flag with a white elephant.
	1881–1917	Naval Jack of Siam	Blue flag with a white elephant in regalia.

War flags

Flag	Date	Use	Description
	1917–1918	Standard of the Siamese Expeditionary Force, Obverse	Triranga defaced with a red disc containing dressed white elephant, facing a flagpole. Briefly, its appearance is the same as naval ensign, but both red banners of the flag contains a stanza from a Buddhist chant in Pali (the Jayamangala Gatha), written in Thai script: "พาหุํสหัส์สมภินิม์มิตสาวุธัน์ตํ ค๎รีเมขลํอุทิตโฆรสเสนมารํ ทานาทิธัม์มวิธินาชิตวามุนิน์โท ตัน์เตชสาภวตุเมชยสิทธินิจ์จํ".
		Standard of the Siamese Expeditionary Force, Reverse	Triranga defaced with a red disc containing King Vajiravudh's personal emblem. The emblem features Thai acronym "ร.ร." and Thai digit six ("๖"), both are displayed under the glowing crown. Both red banners of the flag contains the same chant in Thai script as the obverse.

Diplomatic flags

Flag	Date	Use	Description
	1873–1912	Ambassadorial Standard of Siam	State flag with the crowned arms of Siam at its canton.
		Consular Flag of Siam	State flag with the escutcheon of Siam at its canton.
	1912–1917	Ambassadorial Standard of Siam	State flag with blue circle at its canton. The circle contains Garuda holding crown.
		Consular Flag of Siam	State flag with blue circle at its canton. The circle contains Garuda with outstretched wings.
	1917–1927	Ambassadorial Standard and Consular Flag of Siam	Triranga surmounted with white elephant, facing a pole.

Prime Minister flags

Flag	Date	Use	Description
	1936–1939	Flag of the Prime Minister
	1939–1943	Flag of the Prime Minister
	1943–1979	Flag of the Prime Minister

Royal Thai Government flags

Flag	Date	Use	Description
	1938–1941	Flag of the Minister of Economy
	1938–1979	Flag of the Minister of Education
	1938–1979	Flag of the Minister of Finance
	1938–1979	Flag of the Minister of Foreign Affair
	1938–1979	Flag of the Minister of Interior
	1938–1979	Flag of the Minister of Justice