There were six manufacturing businesses in Riverside County ZIP Codes with between 250 and 499 employees in 2018, according to County Business Patterns (CBP) statistics provided by the United States Census Bureau.
CBP data indicates no other industry had more establishments with between 250 and 499 employees in Riverside County ZIP Codes than manufacturing businesses.
The following table shows industries of total establishments with between 250 and 499 employees in Riverside County in 2018.
| Industry | Total Establishments |
|---|---|
| Manufacturing businesses | 6 |
| Transportation and warehousing businesses | 6 |
| Administrative, support, waste management and remediation services businesses | 4 |
| Retail trade businesses | 4 |
| Wholesale trade businesses | 3 |


