CBP data indicates that there were 3,372 total businesses in Rock County zip codes.
The following table gives a breakdown of businesses in Rock County by total employees in 2017.
Businesses in Rock County (2017) by total employees
| Total employees | Total businesses |
|---|---|
| 0 to 4 | 1,643 |
| 5 to 9 | 694 |
| 10 to 19 | 460 |
| 20 to 49 | 334 |
| 50 to 99 | 123 |
| 100 to 249 | 64 |
| 250 to 499 | 14 |
| more than 500 | 5 |
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