June 1998 Primary Election, Governor: San Mateo County
| Candidate | Party | County total | Percent, party | Percent, total |
| Al Checchi | Dem | 15140 | 13.98% | 10.18% |
| Gray Davis | Dem | 66391 | 61.32% | 44.64% |
| Jane Harman | Dem | 25996 | 24.01% | 17.48% |
| Pia Jensen | Dem | 270 | 0.25% | 0.18% |
| Michael Palitz | Dem | 170 | 0.16% | 0.11% |
| Charles 'Chuck' Pineda, Jr | Dem | 296 | 0.27% | 0.20% |
| James D Crawford | Rep | 397 | 1.11% | 0.27% |
| Dan Lungren | Rep | 32365 | 90.30% | 21.76% |
| Dennis Peron | Rep | 2400 | 6.70% | 1.61% |
| Eduardo M Rivera | Rep | 357 | 1.00% | 0.24% |
| Jeff Williams | Rep | 322 | 0.90% | 0.22% |
| Nathan E Johnson | Al | 355 | 100.00% | 0.24% |
| Dan Hamburg | Grn | 2094 | 100.00% | 1.41% |
| Steve W Kubby | Lib | 1237 | 100.00% | 0.83% |
| Harold H Bloomfield | N.L. | 223 | 100.00% | 0.15% |
| Marsha Feinland | P&F | 277 | 39.51% | 0.19% |
| Gloria Estela La Riva | P&F | 424 | 60.49% | 0.29% |
| Votes not Cast in Race | NA | 2253 | NA | 1.49% |
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