| Rank | County | Private Non-Farm Establishments | 
|---|---|---|
| 1 | Middlesex County, Massachusetts | 41,961 | 
| 2 | Suffolk County, Massachusetts | 19,436 | 
| 3 | Norfolk County, Massachusetts | 18,987 | 
| 4 | Essex County, Massachusetts | 17,874 | 
| 5 | Worcester County, Massachusetts | 17,421 | 
| 6 | Bristol County, Massachusetts | 12,637 | 
| 7 | Plymouth County, Massachusetts | 11,740 | 
| 8 | Hampden County, Massachusetts | 9,652 | 
| 9 | Barnstable County, Massachusetts | 8,116 | 
| 10 | Berkshire County, Massachusetts | 3,985 | 
| 11 | Hampshire County, Massachusetts | 3,459 | 
| 12 | Franklin County, Massachusetts | 1,571 | 
| 13 | Dukes County, Massachusetts | 1,019 | 
| 14 | Nantucket County, Massachusetts | 883 | 
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