| Candidate | Party | County total | Percent, party | Percent, total |
| Barbara Boxer | Dem-Inc | 1771 | 73.49% | 25.13% |
| John Pinkerton | Dem | 639 | 26.51% | 9.07% |
| John M Brown | Rep | 111 | 2.61% | 1.57% |
| Linh Dao | Rep | 39 | 0.92% | 0.55% |
| Matt Fong | Rep | 1807 | 42.45% | 25.64% |
| Darrell Issa | Rep | 1102 | 25.89% | 15.64% |
| Mark Raus | Rep | 227 | 5.33% | 3.22% |
| Frank D Riggs | Rep | 971 | 22.81% | 13.78% |
| H Joseph Perrin, Sr | AI | 87 | 100.00% | 1.23% |
| Ted Brown | Lib | 112 | 100.00% | 1.59% |
| Brian M Rees | NL | 56 | 100.00% | 0.79% |
| Ophie C Beltran | P&F | 46 | 100.00% | 0.65% |
| Timothy R Erich | Rfm | 80 | 100.00% | 1.14% |
| Votes not Cast in Race | NA | 293 | NA | 3.99% |
Return to RAND California 1998 Primary Election: U.S. Senate
Return to RAND California 1998 Primary Election Returns
Return to RAND California Home Page