There were 21,291 total businesses in the county zip codes, with 3,353 professional, scientific and technical services businesses (15.7%) accounting for the largest proportion of these businesses. 10,378 businesses (48.7%) had fewer than five employees, and 340 (1.6%) had 250 or more.
Median-sized businesses in two counties have between five and nine employees.
The following table shows the median business size in all Massachusetts counties.
Median business size in all Massachusetts counties (2016)
| County | Total Employees |
|---|---|
| Barnstable County | 1-4 |
| Berkshire County | 1-4 |
| Bristol County | 1-4 |
| Dukes County | 1-4 |
| Essex County | 1-4 |
| Franklin County | 1-4 |
| Hampden County | 5-9 |
| Hampshire County | 1-4 |
| Middlesex County | 1-4 |
| Nantucket County | 1-4 |
| Norfolk County | 1-4 |
| Plymouth County | 1-4 |
| Suffolk County | 5-9 |
| Worcester County | 1-4 |
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