There were 3,391 total businesses in the county zip codes, with 593 retail trade businesses (17.5%) accounting for the largest proportion of these businesses. 1,538 businesses (45.4%) had fewer than five employees, and 23 (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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