| Candidate | Party | County total | Percent, party | Percent, total |
| Barbara Boxer | Dem-Inc | 14182 | 92.13% | 39.58% |
| John Pinkerton | Dem | 1212 | 7.87% | 3.38% |
| John M Brown | Rep | 148 | 0.79% | 0.41% |
| Linh Dao | Rep | 134 | 0.71% | 0.37% |
| Matt Fong | Rep | 5664 | 30.06% | 15.81% |
| Darrell Issa | Rep | 6466 | 34.31% | 18.05% |
| Mark Raus | Rep | 176 | 0.93% | 0.49% |
| Frank D Riggs | Rep | 6257 | 33.20% | 17.46% |
| H Joseph Perrin, Sr | AI | 121 | 100.00% | 0.34% |
| Ted Brown | Lib | 599 | 100.00% | 1.67% |
| Brian M Rees | NL | 190 | 100.00% | 0.53% |
| Ophie C Beltran | P&F | 415 | 100.00% | 1.16% |
| Timothy R Erich | Rfm | 263 | 100.00% | 0.73% |
| Votes not Cast in Race | NA | 1321 | NA | 3.56% |
Return to RAND California 1998 Primary Election: U.S. Senate
Return to RAND California 1998 Primary Election Returns
Return to RAND California Home Page