Ten provinces with most population: 2005 - 2007   2005     Rank Provinces Number % 1 Bangkok 5,658,953 9.07 2 Nakhon Ratchasima 2,546,763 4.08 3 Ubon Ratchathani 1,774,808 2.84 4 Khon Kaen 1,747,542 2.80 5 Chiang Mai 1,650,009 2.64 6 Buri Ram 1,531,430 2.45 7 Udon Thani 1,523,802 2.44 8 Nakhon Si Thammarat 1,504,420 2.41 9 Si Sa Ket 1,443,975 2.31 10 Surin 1,374,700 2.20   Whole Kingdom 62,418,054 100   2006     Rank Provinces Number % 1 Bangkok 5,695,956 9.07 2 Nakhon Ratchasima 2,555,587 4.07 3 Ubon Ratchathani 1,783,035 2.84 4 Khon Kaen 1,750,500 2.79 5 Chiang Mai 1,658,298 2.64 6 Buri Ram 1,536,722 2.45 7 Udon Thani 1,527,562 2.43 8 Nakhon Si Thammarat 1,510,460 2.40 9 Si Sa Ket 1,446,484 2.30 10 Surin 1,375,257 2.19   Whole Kingdom 62,828,706 100   2007     Rank Provinces Number % 1 Bangkok 5,716,248 9.07 2 Nakhon Ratchasima 2,552,894 4.05 3 Ubon Ratchathani 1,785,709 2.83 4 Khon Kaen 1,752,414 2.78 5 Chiang Mai 1,664,399 2.64 6 Buri Ram 1,536,070 2.44 7 Udon Thani 1,530,686 2.43 8 Nakhon Si Thammarat 1,506,997 2.39 9 Si Sa Ket 1,443,011 2.29 10 Surin 1,372,672 2.18   Whole Kingdom 63,038,247 100 Source : Department of Local Administration,Ministry of Interior Compiled by : Statistical Forecasting Bureau,  National Statistical Office