| | 2010 | | | Rank | Provinces | Employee | | 1 | Nakhon Si Thammarat | 337,766 | | 2 | Ubon Ratchathani | 283,090 | | 3 | Chiang Mai | 252,328 | | 4 | Udon Thani | 233,517 | | 5 | Chon Buri | 225,785 | | 6 | Pathum Thani | 211,163 | | 7 | Surin | 194,165 | | 8 | Nong Khai | 187,418 | | 9 | Nakhon Sawan | 172,007 | | 10 | Kalasin | 155,624 | | | Whole Kingdom | 4,081,641 |
| | | 2011 | | | Rank | Provinces | Employee | | 1 | Bangkok | 1,152,057 | | 2 | Nakhon Ratchasima | 466,943 | | 3 | Samut Prakan | 332,693 | | 4 | Khon Kaen | 331,852 | | 5 | Ubon Ratchathani | 325,130 | | 6 | Nakhon Si Thammarat | 306,711 | | 7 | Udon Thani | 283,298 | | 8 | Chiang Mai | 270,780 | | 9 | Songkhla | 268,589 | | 10 | Chon Buri | 267,943 | | | Whole Kingdom | 11,751,242 |
| | | 2012 | | | Rank | Provinces | Employee | | 1 | Bangkok | 1,209,198 | | 2 | Nakhon Ratchasima | 549,185 | | 3 | Ubon Ratchathani | 339,592 | | 4 | Khon Kaen | 337,178 | | 5 | Nakhon Si Thammarat | 327,792 | | 6 | Samut Prakan | 308,191 | | 7 | Chon Buri | 293,263 | | 8 | Udon Thani | 287,238 | | 9 | Songkhla | 285,282 | | 10 | Si Sa Ket | 277,439 | | | Whole Kingdom | 12,275,999 |
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