Ten provinces with highest establishments in social security: 2009 - 2011
 2009 
RankProvincesNumber
1Bangkok139,799
2Samut Prakan19,236
3Chon Buri15,442
4Nonthaburi12,844
5Chiang Mai12,555
6Pathum Thani11,325
7Phuket8,490
8Songkhla7,943
9Nakhon Ratchasima7,746
10Samut Sakhon7,621
 Whole Kingdom389,953
 2010 
RankProvincesNumber
1Bangkok139,723
2Samut Prakan19,594
3Chon Buri16,046
4Chiang Mai13,232
5Nonthaburi13,173
6Pathum Thani11,911
7Phuket8,618
8Samut Sakhon7,922
9Songkhla7,879
10Nakhon Ratchasima7,867
 Whole Kingdom395,924
 2011 
RankProvincesNumber
1Bangkok141,793
2Samut Prakan20,145
3Chon Buri16,767
4Nonthaburi13,771
5Chiang Mai13,530
6Pathum Thani12,351
7Phuket8,924
8Samut Sakhon8,242
9Songkhla8,083
10Nakhon Ratchasima7,913
 Whole Kingdom404,195
Source : Social Security Office, Ministry of Labour
Compiled by : Statistical Forecasting Bureau,  National Statistical Office