# List of Thai flags

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 officially standardized in 2017. | National flag |

## Royal flags
### Royal standards

| 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. |
| 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. |
| 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 |
| 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

| 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. |
| 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. |
| 2019–present | 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. |
| 2019–present | 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

| 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. |
| 1979– | 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). |
| | 1917– | Naval Ensign | A red disc containing a white elephant in regalia centred on the national flag. |

## Military flags

| 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)). |
| 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)). |
| 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)). |
| 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)). |
| 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. |
| 1979– | 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. |
| 2025– | Flag for Commander-in-Chief of the Royal Thai Air Force for Rama X | Yellow flag in the ratio of 2:3, with dark yellow borders and an emblem depicting an escutcheon depicting the National flag, behind are a pair of wings, topped by the Great Crown of Victory, with blue rays and a white Aum/ Rama IX Monument |

## 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

| 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. |
| 1988– | The Cross Flag—Christianity | A white rectangle with a red Latin cross in the center, symbol of the Christian Organizations and Christians in Thailand. |
| 1997– | The Jihad Flag—Islam | A black or green rectangle with white Shahada in the center. meaning that "there is no other god but Allah, and Muhammad is the Messenger of Allah," symbol of the Muslim Organizations and Muslims 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. |
| | 1927– | Consular Flag of Thailand | Triranga surmounted with blue disc containing a white elephant. |

## Provincial flags

| Date | Use | Description |
| 1993-present | Flag of Amnat Charoen Province | Purple field. In the center of the flag is the provincial seal, featuring Phra Mongkol Ming Mueang, a revered Buddha statue significant to the province. |
| | Flag of Ang Thong Province | Bicolor flag with yellow on the top half and green on the bottom half. In the center of the flag is the provincial seal. |
| | 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. |
| 2011-present | Flag of Bueng Kan Province | Rectangular flag consisting of three horizontal stripes in the proportions of purple, white, and purple. In the center of the flag is the provincial seal. |
| | 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. |
| 2007-present | Flag of Chachoengsao Province | Rectangular field of dark red (maroon.) In the center of the flag is the provincial seal, which depicts Wat Sothonwararam |
| | Flag of Chai Nat Province | Provincial seal set against a magenta background, which is the symbolic color of the province. |
| | Flag of Chaiyaphum Province | Horizontal stripes in brown, orange, and brown. In the center of the flag is the provincial seal, depicting the "Thong Sam Chai," an ancient victory flag of the army. |
| | Flag of Chanthaburi Province | A red field. In the center of the flag is the provincial seal, with the text "จังหวัดจันทบุรี" (Chanthaburi Province) displayed below the seal. |
| | Flag of Chiang Mai Province | Rectangular flag with a blue field. In the center of the flag is the provincial seal, which features a white elephant standing within a traditional Thai ornate structure "Ruen Kaew." |
| | Flag of Chiang Rai Province | Rectangular flag with vertical stripes in blue, purple, and blue. The central purple stripe features a white elephant and a text banner displaying the province's name. |
| | Flag of Chonburi Province | Rectangular flag with horizontal stripes in dark red, yellow, and dark red. In the center of the flag is provincial seal consisting of Kao Sam Muk and the sea. |
| | Flag of Chumphon Province | Blue field. In the center of the flag is the provincial seal, which depicts a goddess standing in a blessing gesture in front of a fort, flanked by two fig trees. |
| | Flag of Kalasin Province | Horizontal stripes in green, orange, and green. In the center of the flag is the provincial seal, which is a circular emblem containing images of grass, a black water pond (symbolizing the name "Kalasin"), mountains, and rain clouds. Below features a white text that reads "จังหวัดกาฬสินธุ์" (Kalasin Province) in a semi-circular arc. |
| | Flag of Kamphaeng Phet Province | Rectangular flag with three horizontal stripes. The top stripe is yellow, the middle stripe is red, and the bottom stripe is leaf green. In the center of the red stripe is the provincial seal. |
| | Flag of Kanchanaburi Province | A blue flag with the central area in vermillion colour and the provincial seal in the center. |
| | Flag of Khon Kaen Province | Maroon field. In the center of the flag is the provincial emblem, which depicts a stupa (Phra That Kham Kaen) built on a tree stump. |
| | Flags of Krabi Province | Currently, the flags of Krabi Province have two variants. Two horizontal stripes. The top stripe is yellow, and the bottom stripe is blue. In the center of the flag is the provincial seal. (The most commonly used one) Yellow field. In the center of the flag is the provincial seal. |
| | Flag of Lampang Province | Rectangular flag with a green field. In the center of the flag is the provincial seal, which features a white rooster standing within a mandapa structure of Wat Phra That Lampang Luang. |
| | Flag of Lamphun Province | Rectangular flag with a blue field. In the center of the flag is the provincial seal, which features Phra That Hariphunchai. Below the emblem is the text "จังหวัดลำพูน" (Lamphun Province). |
| | Flag of Loei Province | Rectangular flag with a blue field. In the center of the flag is the provincial emblem, which features Phra That Si Song Rak within a circle. Below the emblem is the text "จังหวัดเลย" (Loei Province). |
| | Flag of Lopburi Province | Horizontal stripes in blue, white, and blue. In the center of the flag is the provincial emblem, which depicts the four-armed Narai standing in front of Phra Prang Sam Yot. |
| | Flag of Mae Hong Son Province | Rectangular flag divided horizontally into three equal parts: brown, blue, and brown. In the center of the blue stripe is the provincial seal within a red circle. |
| | Flag of Maha Sarakham Province | Yellow field with a brown stripe running horizontally through the center. Within the brown stripe is the provincial seal. |
| | Flag of Mukdahan Province | White field, with red borders on three sides (except for the side attached to the flagpole.) In the center of the flag is the provincial seal. |
| | Flag of Nakhon Nayok Province | Green field. In the center of the flag is the provincial seal, which depicts an elephant holding a sheaf of rice. Below the emblem is a yellow ribbon with the text "นครนายก" (Nakhon Nayok Province). |
| | Flag of Nakhon Pathom Province | Blue field. In the center of the flag is the provincial seal, which depicts Phra Pathom Chedi. The emblem is adorned with the Thai numeral "4" within the Great Crown of Victory. Below the emblem is the text "นครปฐม" (Nakhon Pathom Province) in white. |
| | Flag of Nakhon Phanom Province | Rectangular flag divided horizontally into two stripes. The top stripe is red and the bottom stripe is black. In the center of the flag is the provincial seal, which features Phra That Phanom. |
| | Flag of Nakhon Ratchasima Province | Orange field. In the center of the flag is the provincial seal, which depicts the monument of Thao Suranari in front of the Chumphon Gate. |
| | Flag of Nakhon Sawan Province | Blue field. In the center of the flag is the provincial seal, which features an image of a three-spired vimana. |
| | Flag of Nakhon Si Thammarat Province | Rectangular flag divided horizontally into two stripes. Purple on the top and yellow on the bottom. In the center of the flag is the provincial seal, which features Phra Borommathat Chedi of Wat Phra Mahathat Woramahawihan, surrounded by the symbols of the twelve zodiac signs. |
| | Flag of Nan Province | Rectangular flag divided horizontally into two stripes. Purple on the top and yellow on the bottom. In the center of the flag is the provincial seal, which features Phra That Chae Haeng on top of Usuparatch |
| | Flag of Narathiwat Province | Yellow square at the hoist. Within the yellow square is the provincial seal, which features an image of a Kolae boat with a fully unfurled sail. On the sail is an image of a white elephant adorned with royal regalia, representing Phra Sri Nararatt Rajakarini, an important elephant presented to King Bhumibol Adulyadej by Narathiwat Province in 1977. The remaining part of the flag consists of seven horizontal stripes in alternating red and white, with four red stripes and three white stripes. |
| 1993-present | Flag of Nong Bua Lamphu Province | White field. In the center of the flag is the provincial seal, which depicts a statue of King Naresuan standing in front of a shrine. In the background is Nong Bua Lamphu Lake. Below the emblem, there is a ribbon tied in a knot at both ends, with the text "จังหวัดหนองบัวลำภู" (Nong Bua Lamphu Province) inside. |
| | Flag of Nong Khai Province | Horizontal stripes in black, red, and black. In the center of the flag is the provincial seal, which features an image of bamboo clumps by a pond. |
| | Flag of Nonthaburi Province | Vertical stripes in purple and blue. In the center of the flag is the provincial seal, which features an intricately decorated earthenware pot. Symbolized the long-standing pottery-making tradition of the people of Nonthaburi Province. |
| | Flag of Pathum Thani Province | Vertical stripes in blue and white. In the center of the flag is the provincial seal, which features a lotus flower and a pair of rice sheaf rising above the water. |
| | Flag of Pattani Province | Rectangular flag divided horizontally into two stripes. yellow on the top and green on the bottom. In the center of the flag is an image of the Phaya Tani cannon. |
| | Flag of Phang Nga Province | Rectangular flag with vertical stripes in blue, yellow, and pink. In the center of the flag is the provincial seal, which features an image of a mining dredge, Khao Tapu, and Khao Chang. |
| | Flag of Phatthalung Province | Horizontal stripes in yellow, purple, and yellow. In the center of the flag is the provincial seal, which features an image of Khao Ok Thalu. |
| | Flag of Phayao Province | Magenta field. In the center of the flag is the provincial seal. |
| | Flag of Phetchabun Province | Horizontal stripes in green, white, and green. In the center of the flag is the provincial seal. |
| | Flag of Phetchaburi Province | Rectangular flag with blue, yellow, and blue horizontal stripes. In the center of the yellow stripe is the provincial seal, which features an image of a rice field, sugar palm trees, and Phra Nakhon Khiri within a circular frame. |
| | Flag of Phichit Province | Rectangular flag divided into five stripes, three dark green stripes alternating with two white stripes. In the center of the flag is the provincial seal. |
| | Flag of Phitsanulok Province | Purple field. In the center of the flag is the provincial seal, which depicts Phra Buddha Chinaraj within a circular frame adorned with Thai decorative patterns. |
| | Flag of Phrae Province | Vertical stripes in Green and red. In the center of the flag is the provincial seal, which features an image of Phra That Cho Hae stupa placed on the back of a horse. |
| | Flag of Phra Nakhon Si Ayutthaya Province | Rectangular flag with vertical stripes in blue, light blue, and blue. In the center of the flag is the provincial seal, which features a conch shell on the pedestal tray in the pavilion under the Cordia dichotoma tree. |
| | Flag of Phuket Province | Light blue field. In the center of the flag is the provincial seal, which features the statue of Thao Thep Krasattri and Thao Si Sunthon. |
| | Flag of Prachin Buri Province | Red field at the hoist, which is designated as the regional color. In the center of the flag is the provincial seal, which features an image of a Bodhi tree within a circular frame, The fly end of the flag features a yellow stripe. |
| | Flag of Prachuap Khiri Khan Province | Yellow field. In the center of the flag is the provincial seal. |
| | Flag of Ranong Province | Green square at the hoist. Within the green square is the provincial emblem, which features an image of a castle on the clouds. The remaining part of the flag consists of seven horizontal stripes in alternating yellow and orange, with four yellow stripes and three orange stripes. |
| | Flag of Ratchaburi Province | Blue field. In the center of the flag is the provincial seal, which depicts regalia. |
| | Flag of Rayong Province | Rectangular flag with vertical stripes in red, yellow, and blue. In the center of the flag is the provincial seal, which features an image of a royal pavilion where King Chulalongkorn resided on Ko Samet. |
| 2002-present | Flag of Roi Et Province | Yellow field. In the center of the flag is the provincial seal. |
| 1993-present | Flag of Sa Kaeo Province | Rectangular flag divided horizontally into two stripes. yellow on the top and green on the bottom. In the center of the flag is the provincial seal. |
| | Flag of Sakon Nakhon Province | Rectangular flag divided horizontally into two stripes. blue on the top and yellow on the bottom. In the center of the flag is the provincial seal, which features an image of Wat Phra That Choeng Chum. |
| | Flag of Samut Prakan Province | Light blue field. In the center of the flag is the provincial seal. |
| | Flag of Samut Sakhon Province | Horizontal stripes in pink, light blue, and pink. In the center of the flag is the provincial seal. |
| | Flag of Samut Songkhram Province | Vertical stripes in blue, white, and blue. In the center of the flag is the provincial seal. |
| 2022-present | Flag of Saraburi Province | Horizontal stripes in red, white, and red. In the center of the flag is the provincial seal. |
| | Flag of Satun Province | Green field, with yellow borders on three sides (except for the side attached to the flagpole.) In the center of the flag is the provincial seal. |
| 2004-present | Flag of Sing Buri Province | Red field, in the center of the flag is the provincial seal, which features an image of a monument honoring the eleven leaders of Khai Bang Rachan |
| | Flag of Sisaket Province | Rectangular flag divided horizontally into two stripes. Orange on the top and white on the bottom. In the center of the flag is the provincial seal. |
| | Flag of Songkhla Province | Cyan d, in, the center of the flag features a conch shell on the pedestal trayy |
| | Flag of Sukhothai Province | Horizontal stripes in red, yellow, and green. In the upper left corner of the flag is the provincial seal. |
| | Flag of Suphan Buri Province | Horizontal stripes in blue, orange, and blue. In the center of the flag is the provincial seal. which depicts the elephant duel between Naresuan and Mingyi Swa |
| | Flag of Surat Thani Province | Rectangular flag divided horizontally into two stripes. Orange on the top and Yellow on the bottom. In the center of the flag is the provincial seal. |
| | Flag of Surin Province | Horizontal stripes in red, yellow, and green. In the center of the flag is the provincial seal. |
| | Flag of Tak Province | Purple and yellow flag with 7 stripes: 4 purple and 3 yellow. On the side next to the flagpole is a triangular blue field with the provincial seal, which features an image of Naresuanpouring water over the neck of an elephant. |
| | Flag of Trang Province | Horizontal stripes in light blue, white, and light blue. In the center of the flag is the provincial seal. |
| | Flag of Trat Province | Horizontal stripes in blue and red. In the center of the flag is the provincial seal. |
| | Flag of Ubon Ratchathani Province | Two horizontal stripes. The top of the flag has a pink lotus flower embroidered on a pink background. Below the flag is the white letter "อุบลราชธานี" (Ubon Ratchathani) embroidered on a green background. |
| | Flag of Udon Thani Province | Orange field. In the center of the flag is the provincial seal. |
| | Flag of Uthai Thani Province | Rectangular flag divided horizontally into two stripes. yellow on the top and green on the bottom. In the center of the flag is the provincial seal. |
| | Flag of Uttaradit Province | A rectangular flag with an orange background and two dark purple stripes intersecting in the shape of a cross. In the center is the provincial seal, featuring a stone throne covered by a yellow pavilion, flanked by dark blue scroll patterns. In front of the pavilion is a red Garuda, all enclosed within a circular frame with a 70-centimeter diameter. The name of the province is inscribed around the edge of the circle. |
| | Flag of Yala Province | Rectangular flag divided horizontally into two stripes. green on the top and white on the bottom. In the center of the flag is the provincial seal. |
| | Flag of Yasothon Province | Rectangular flag divided horizontally into two stripes. pink on the top and light blue on the bottom. In the center of the flag is the provincial seal. |

## City flags

| Use | Description |
| Flag of Khon Kaen | A light-blue field with the city seal in the center. |
| Flag of Lampang | A green field with the city seal in the center. |
| Flag of Mae Sot | A green field with the golden city seal in the center. |
| Flag of Nonthaburi | Flag divided horizontally into three stripes, top being red, middle being yellow-gold, and bottom being blue. In the center of the flag, there is a golden city seal and a curved text that says "เทศบาลนครนนทบุรี" which means "Nonthaburi City Municipality". |
| Flag of Om Noi | A purple field with the city seal in the center. |
| Flag of Pak Kret | A red field with the city seal in the center. |
| Flag of Pattaya | A blue field with the city seal surrounded by a white outline in the center. |
| Flag of Phitsanulok | A light-purple field with the city seal in the center. |
| Flag of Rangsit | Flag divided horizontally into two stripes, the top being red, the bottom being blue. In the center of the flag is the city seal. |
| Flag of Rayong | A green field with the city seal in the center. |
| Flag of Sakhon Nakhon | A reddish-brown field with the city seal in the center. |
| Flag of Trang | A light-blue field with the city seal in the center. |
| Flag of Udon Thani | An orange field with the city seal a bit over the center, below there is a text that says "เทศบาลนครอุดรธานี" which means "Udon Thani City Municipality". |

## Historical flags

| 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 Phueak" (ธงช้างเผือก) (the white elephant flag). Commonly attributed to Rama IV's reign but was first implemented during the reign of Rama III. |
| 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 with the only major difference being that the middle stripe is red. It is currently used by several anti-monarchists due to its omission of the colour blue which symbolizes the monarchy. |

### Naval jacks

| 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". |
| | 1917–1918 | 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

| Date | Use | Description |
| 1873–1912 | Ambassadorial Standard of Siam | State flag with the crowned arms of Siam at its canton. |
| 1873–1912 | 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. |
| 1912–1917 | 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

| Date | Use |
| 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

| Date | Use |
| 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 |

### Provincial flags

| Date | Use | Description |
| Unknown–2007 | Flag of Chachoengsao Province | Rectangular field of dark red (maroon.) In the center of the flag is the former provincial seal. |
| | Flag of Chanthaburi Province | Red field with the provincial seal positioned in the top left corner, set within a blue square. The emblem depicts a rabbit in the moon, shining brightly. |
| | Flag of Krabi Province | Yellow field with a red square in the top left corner: Inside the red square is two crossed white swords. Below the crossed swords, there is text in the banner that reads "จังหวัดกระบี่" (Krabi Province). |
| | Flag of Phrae Province | Black on the hoist side and red on the fly side. In the center of the flag is a blue circular emblem. The upper half of the emblem features an image of Wat Phra That Cho Hae, a royal temple. The lower half contains the text "จังหวัดแพร่" (Phrae Province) arranged in a semicircular arc. |
| Unknown–2002 | Flag of Roi Et Province | Yellow field. In the center of the flag is the former provincial seal. Which features an island in the middle of Bueng Phlan Chai Lake. On the island, there is a pavilion that houses the Constitution on a phan. |
| Unknown–2022 | Flag of Saraburi Province | Horizontal stripes in red, white, and red. In the center of the flag is the former provincial seal. |
| Unknown–2004 | Flag of Sing Buri Province | Red field with the center of the flag is the former provincial seal, which depicts an image of the camp of Bang Rachan. |