There were 20,265 total businesses in the county zip codes, with 2,860 health care and social assistance businesses (14.1%) accounting for the largest proportion of these businesses. 10,323 businesses (50.9%) had fewer than five employees, and 133 (0.7%) had 250 or more.
Median-sized businesses in four counties have between five and nine employees.
The following table shows the median business size in all Arizona counties.
Median business size in all Arizona counties (2016)
| County | Total Employees |
|---|---|
| Apache County | 5-9 |
| Cochise County | 1-4 |
| Coconino County | 1-4 |
| Gila County | 1-4 |
| Graham County | 5-9 |
| Greenlee County | 1-4 |
| La Paz County | 5-9 |
| Maricopa County | 1-4 |
| Mohave County | 1-4 |
| Navajo County | 1-4 |
| Pima County | 1-4 |
| Pinal County | 1-4 |
| Santa Cruz County | 1-4 |
| Yavapai County | 1-4 |
| Yuma County | 5-9 |
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