| Flag | 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 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" 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, mountains, and rain clouds. Below features a white text that reads "จังหวัดกาฬสินธุ์" 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 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.
- Yellow field. In the center of the flag is the provincial seal.
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| | 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. 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". |
| | 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". |
| | 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 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". |
| | 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" 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" 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 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" 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. |