CBP data indicates that there were 1,855 total businesses in St Mary's County zip codes.
The following table gives a breakdown of businesses in St Mary's County by total employees in 2017.
Businesses in St Mary's County (2017) by total employees
| Total employees | Total businesses |
|---|---|
| 0 to 4 | 908 |
| 5 to 9 | 370 |
| 10 to 19 | 252 |
| 20 to 49 | 183 |
| 50 to 99 | 63 |
| 100 to 249 | 36 |
| 250 to 499 | 0-2 |
| more than 500 | 3 |
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