| Candidate | Party | County total | Percent, party | Percent, total |
| Barbara Boxer | Dem-Inc | 10281 | 86.45% | 37.31% |
| John Pinkerton | Dem | 1611 | 13.55% | 5.85% |
| John M Brown | Rep | 172 | 1.16% | 0.62% |
| Linh Dao | Rep | 93 | 0.63% | 0.34% |
| Matt Fong | Rep | 5736 | 38.84% | 20.82% |
| Darrell Issa | Rep | 7221 | 48.90% | 26.21% |
| Mark Raus | Rep | 207 | 1.40% | 0.75% |
| Frank D Riggs | Rep | 1338 | 9.06% | 4.86% |
| H Joseph Perrin, Sr | AI | 113 | 100.00% | 0.41% |
| Ted Brown | Lib | 198 | 100.00% | 0.72% |
| Brian M Rees | NL | 81 | 100.00% | 0.29% |
| Ophie C Beltran | P&F | 302 | 100.00% | 1.10% |
| Timothy R Erich | Rfm | 201 | 100.00% | 0.73% |
| Votes not Cast in Race | NA | 2458 | NA | 8.19% |
Return to RAND California 1998 Primary Election: U.S. Senate
Return to RAND California 1998 Primary Election Returns
Return to RAND California Home Page