| | 2004 | | | Rank | Provinces | Number | | 1 | Nakhon Ratchasima | 564,861 | | 2 | Chiang Mai | 457,474 | | 3 | Khon Kaen | 390,564 | | 4 | Ubon Ratchathani | 353,372 | | 5 | Chon Buri | 339,265 | | 6 | Nakhon Si Thammarat | 338,692 | | 7 | Udon Thani | 323,314 | | 8 | Songkhla | 315,487 | | 9 | Chiang Rai | 311,549 | | 10 | Buri Ram | 294,061 | | | Whole Kingdom | 12,842,703 |
| | | 2005 | | | Rank | Provinces | Number | | 1 | Nakhon Ratchasima | 591,160 | | 2 | Chiang Mai | 481,503 | | 3 | Khon Kaen | 401,276 | | 4 | Ubon Ratchathani | 385,713 | | 5 | Chon Buri | 371,561 | | 6 | Nakhon Si Thammarat | 353,092 | | 7 | Udon Thani | 333,660 | | 8 | Songkhla | 331,600 | | 9 | Chiang Rai | 318,346 | | 10 | Buri Ram | 302,735 | | | Whole Kingdom | 13,317,769 |
| | | 2006 | | | Rank | Provinces | Number | | 1 | Nakhon Ratchasima | 607,319 | | 2 | Chiang Mai | 495,959 | | 3 | Khon Kaen | 411,378 | | 4 | Ubon Ratchathani | 399,898 | | 5 | Chon Buri | 393,218 | | 6 | Nakhon Si Thammarat | 363,754 | | 7 | Udon Thani | 342,991 | | 8 | Songkhla | 342,838 | | 9 | Chiang Rai | 324,836 | | 10 | Buri Ram | 310,348 | | | Whole Kingdom | 13,749,452 |
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