There were 9,252 total businesses in the county zip codes, with 2,080 professional, scientific and technical services businesses (22.5%) accounting for the largest proportion of these businesses. 4,887 businesses (52.8%) had fewer than five employees, and 68 (0.7%) had 250 or more.
Median-sized businesses in five counties have between five and nine employees.
The following table shows the median business size in all Maryland counties.
Median business size in all Maryland counties (2016)
| County | Total Employees |
|---|---|
| Allegany County | 5-9 |
| Anne Arundel County | 1-4 |
| Baltimore County | 1-4 |
| Calvert County | 1-4 |
| Caroline County | 1-4 |
| Carroll County | 1-4 |
| Cecil County | 1-4 |
| Charles County | 5-9 |
| Dorchester County | 1-4 |
| Frederick County | 1-4 |
| Garrett County | 1-4 |
| Harford County | 1-4 |
| Howard County | 1-4 |
| Kent County | 1-4 |
| Montgomery County | 1-4 |
| Prince George's County | 1-4 |
| Queen Anne's County | 1-4 |
| St. Mary's County | 5-9 |
| Somerset County | 1-4 |
| Talbot County | 1-4 |
| Washington County | 5-9 |
| Wicomico County | 5-9 |
| Worcester County | 1-4 |
| Baltimore city | 1-4 |
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