| Company Name | Porterville Employment |
| Wal-Mart Distribution | 1527 |
| Citrus Packing Facilities | 358 |
| Royalty Carpet Mills | 286 |
| Beckman-Coulter, Inc. | 251 |
| Foster Farms | 247 |
| Bank of the Sierra | 185 |
| Mervyns | 111 |
| Target | 106 |
| National Vitamin | 92 |
| Pro Document Solutions | 80 |
| 1990 | 2000 | %change |
| 29,563 | 39,615 | 34.0 |
| Private Utilities Southern California Edison Southern California Gas Company | Communications Pacific Bell |
| Natural Gas Southern California Gas Company | Water & Sewer Municipal |