| | City | Population |
| 1. | Bangkok | 5,104,476 |
| 2. | Samut Prakan | 388,920 |
| 3. | Udon Thani | 247,231 |
| 4. | Chon Buri | 219,164 |
| 5. | Nakhon Ratchasima | 208,781 |
| 6. | Chiang Mai | 200,952 |
| 7. | Hat Yai | 191,696 |
| 8. | Pak Kret | 182,926 |
| 9. | Si Racha | 178,916 |
| 10. | Phra Pradaeng | 171,333 |
| 11. | Lampang | 156,139 |
| 12. | Khon Kaen | 147,579 |
| 13. | Surat Thani | 127,201 |
| 14. | Ban Rangsit | 123,382 |
| 15. | Ubon Ratchathani | 122,533 |
| 16. | Nakhon Si Thammarat | 120,836 |
| 17. | Changwat Rayong | 119,080 |
| 18. | Khlong Luang | 118,551 |
| 19. | Nakhon Pathom | 117,927 |
| 20. | Phitsanulok | 103,427 |
| 21. | Chanthaburi | 99,819 |
| 22. | Ban Phattha Ya | 97,296 |
| 23. | Yala | 93,558 |
| 24. | Ratchaburi | 92,448 |
| 25. | Phuket | 89,072 |
| 26. | Ban Mai | 86,899 |
| 27. | Phra Nakhon Si Ayutthaya | 81,962 |
| 28. | Chiang Rai | 78,756 |
| 29. | Bang Kruai | 78,305 |
| 30. | Sakon Nakhon | 76,237 |
| 31. | Krathum Baen | 72,819 |
| 32. | Trang | 66,713 |
| 33. | Sattahip | 65,444 |
| 34. | Kanchanaburi | 63,699 |
| 35. | Nong Khai | 63,609 |
| 36. | Samut Sakhon | 63,498 |
| 37. | Ban Lam Luk Ka | 60,700 |
| 38. | Kamphaeng Phet | 58,787 |
| 39. | Chaiyaphum | 58,350 |
| 40. | Uttaradit | 58,313 |
| 41. | Lop Buri | 57,761 |
| 42. | Ban Pong | 57,559 |
| 43. | Phra Phutthabat | 57,008 |
| 44. | Chumphon | 55,835 |
| 45. | Klaeng | 55,619 |
| 46. | Kalasin | 55,102 |
| 47. | Suphan Buri | 53,399 |
| 48. | Tha Maka | 52,907 |
| 49. | Maha Sarakham | 51,584 |
| 50. | Phetchabun | 50,656 |
| 51. | Hua Hin | 50,456 |
| 52. | Chachoengsao | 49,741 |
| 53. | Cha-am | 49,375 |
| 54. | Pak Chong | 48,999 |
| 55. | Narathiwat | 47,771 |
| 56. | Pran Buri | 47,293 |
| 57. | Surin | 46,673 |
| 58. | Phetchaburi | 46,601 |
| 59. | Chum Phae | 46,335 |
| 60. | Sadao | 46,236 |
| 61. | Si Sa Ket | 44,751 |
| 62. | Mae Sot | 44,563 |
| 63. | Phatthalung | 43,522 |
| 64. | Warin Chamrap | 43,102 |
| 65. | Sungai Kolok | 42,776 |
| 66. | Tha Yang | 42,602 |
| 67. | Ban Phaeo | 41,904 |
| 68. | Bang Bua Thong | 41,567 |
| 69. | Nong Khae | 41,067 |
| 70. | Mukdahan | 40,480 |
| 71. | Ban Na | 40,174 |
| 72. | Ko Samui | 39,681 |
| 73. | Bang Lamung | 39,620 |
| 74. | Roi Et | 39,328 |
| 75. | Wichian Buri | 39,272 |
| 76. | Phrae | 38,538 |
| 77. | Ban Mae Chan | 37,672 |
| 78. | Sam Phran | 37,115 |
| 79. | Kantharalak | 36,621 |
| 80. | Photharam | 36,248 |
| 81. | Phichit | 35,760 |
| 82. | Det Udom | 35,669 |
| 83. | Ban Phai | 35,583 |
| 84. | Amphoe Tha Bo | 35,292 |
| 85. | Loei | 35,273 |
| 86. | Samut Songkhram | 35,065 |
| 87. | Kathu | 34,835 |
| 88. | Amnat Charoen | 34,769 |
| 89. | Nakhon Phanom | 34,595 |
| 90. | Satun | 34,544 |
| 91. | Prachuap Khiri Khan | 33,521 |
| 92. | San Kamphaeng | 32,950 |
| 93. | Prachin Buri | 32,600 |
| 94. | Krabi | 31,219 |
| 95. | Ban Bang Sao Thong | 31,153 |
| 96. | Yaring | 31,111 |
| 97. | Amphoe Na Klang | 31,024 |
| 98. | Kaeng Khoi | 30,332 |
| 99. | Betong | 29,604 |
| 100. | Bang Phae | 29,548 |
The Source for World Rankings