San Mateo County, California
Precinct data
Results by precinct
295 precincts · 330,449 votes
Precinct boundaries and identifiers are cycle-specific. This table does not join rows across years without a validated crosswalk.
| Precinct -3602136021 | 2,257 | 607 | 106 | 2,970 | 76.0% | 20.4% | D+55.6 |
|---|---|---|---|---|---|---|---|
| Precinct -2604326043 | 2,199 | 570 | 116 | 2,885 | 76.2% | 19.8% | D+56.5 |
| Precinct -2604626046 | 2,240 | 559 | 82 | 2,881 | 77.8% | 19.4% | D+58.3 |
| Precinct -3700137001 | 2,182 | 585 | 101 | 2,868 | 76.1% | 20.4% | D+55.7 |
| Precinct -1400614006 | 1,816 | 831 | 88 | 2,735 | 66.4% | 30.4% | D+36.0 |
| Precinct -3501835018 | 1,899 | 741 | 86 | 2,726 | 69.7% | 27.2% | D+42.5 |
| Precinct -2605826058 | 2,007 | 604 | 81 | 2,692 | 74.6% | 22.4% | D+52.1 |
| Precinct -2604926049 | 2,012 | 594 | 80 | 2,686 | 74.9% | 22.1% | D+52.8 |
| Precinct -2605226052 | 1,972 | 604 | 65 | 2,641 | 74.7% | 22.9% | D+51.8 |
| Precinct -2603626036 | 1,888 | 641 | 90 | 2,619 | 72.1% | 24.5% | D+47.6 |
| Precinct -2603026030 | 1,936 | 541 | 70 | 2,547 | 76.0% | 21.2% | D+54.8 |
| Precinct -3600936009 | 2,010 | 487 | 50 | 2,547 | 78.9% | 19.1% | D+59.8 |
| Precinct -2602626026 | 1,969 | 499 | 74 | 2,542 | 77.5% | 19.6% | D+57.8 |
| Precinct -2600826008 | 1,815 | 621 | 85 | 2,521 | 72.0% | 24.6% | D+47.4 |
| Precinct -3502935029 | 1,784 | 622 | 77 | 2,483 | 71.8% | 25.1% | D+46.8 |
| Precinct -2201022010 | 1,819 | 569 | 88 | 2,476 | 73.5% | 23.0% | D+50.5 |
| Precinct -2200822008 | 1,767 | 612 | 89 | 2,468 | 71.6% | 24.8% | D+46.8 |
| Precinct -1500615006 | 1,489 | 865 | 102 | 2,456 | 60.6% | 35.2% | D+25.4 |
| Precinct -4600646006 | 1,918 | 436 | 97 | 2,451 | 78.3% | 17.8% | D+60.5 |
| Precinct -5602256022 | 1,748 | 634 | 67 | 2,449 | 71.4% | 25.9% | D+45.5 |
| Precinct -1200312003 | 1,624 | 726 | 93 | 2,443 | 66.5% | 29.7% | D+36.8 |
| Precinct -5604656046 | 1,686 | 648 | 75 | 2,409 | 70.0% | 26.9% | D+43.1 |
| Precinct -1800618006 | 1,701 | 629 | 76 | 2,406 | 70.7% | 26.1% | D+44.6 |
| Precinct -1800818008 | 1,708 | 617 | 70 | 2,395 | 71.3% | 25.8% | D+45.6 |
| Precinct -1501215012 | 1,512 | 753 | 113 | 2,378 | 63.6% | 31.7% | D+31.9 |
| Precinct -4640246402 | 1,757 | 510 | 99 | 2,366 | 74.3% | 21.6% | D+52.7 |
| Precinct -5000150001 | 1,798 | 467 | 101 | 2,366 | 76.0% | 19.7% | D+56.3 |
| Precinct -2200522005 | 1,625 | 619 | 110 | 2,354 | 69.0% | 26.3% | D+42.7 |
| Precinct -5604856048 | 1,650 | 626 | 73 | 2,349 | 70.2% | 26.6% | D+43.6 |
| Precinct -5802558025 | 1,614 | 631 | 82 | 2,327 | 69.4% | 27.1% | D+42.2 |
| Precinct -4603346033 | 1,794 | 471 | 59 | 2,324 | 77.2% | 20.3% | D+56.9 |
| Precinct -4401244012 | 1,894 | 351 | 78 | 2,323 | 81.5% | 15.1% | D+66.4 |
| Precinct -4603846038 | 1,756 | 496 | 71 | 2,323 | 75.6% | 21.4% | D+54.2 |
| Precinct -5603356033 | 1,668 | 574 | 69 | 2,311 | 72.2% | 24.8% | D+47.3 |
| Precinct -2202122021 | 1,682 | 538 | 80 | 2,300 | 73.1% | 23.4% | D+49.7 |
| Precinct -2602326023 | 1,770 | 447 | 78 | 2,295 | 77.1% | 19.5% | D+57.6 |
| Precinct -3600436004 | 1,773 | 448 | 58 | 2,279 | 77.8% | 19.7% | D+58.1 |
| Precinct -3400134001 | 1,901 | 298 | 73 | 2,272 | 83.7% | 13.1% | D+70.6 |
| Precinct -3400934009 | 1,794 | 412 | 65 | 2,271 | 79.0% | 18.1% | D+60.9 |
| Precinct -3601436014 | 1,833 | 374 | 51 | 2,258 | 81.2% | 16.6% | D+64.6 |
| Precinct -3601736017 | 1,755 | 447 | 51 | 2,253 | 77.9% | 19.8% | D+58.1 |
| Precinct -5601456014 | 1,614 | 546 | 75 | 2,235 | 72.2% | 24.4% | D+47.8 |
| Precinct -3501035010 | 1,715 | 418 | 90 | 2,223 | 77.1% | 18.8% | D+58.3 |
| Precinct -5603856038 | 1,477 | 631 | 65 | 2,173 | 68.0% | 29.0% | D+38.9 |
| Precinct -4600846008 | 1,693 | 407 | 68 | 2,168 | 78.1% | 18.8% | D+59.3 |
| Precinct -1200612006 | 1,453 | 633 | 80 | 2,166 | 67.1% | 29.2% | D+37.9 |
| Precinct -3501435014 | 1,589 | 513 | 63 | 2,165 | 73.4% | 23.7% | D+49.7 |
| Precinct -3600636006 | 1,710 | 376 | 67 | 2,153 | 79.4% | 17.5% | D+62.0 |
| Precinct -5602056020 | 1,422 | 627 | 97 | 2,146 | 66.3% | 29.2% | D+37.0 |
| Precinct -5600956009 | 1,455 | 607 | 78 | 2,140 | 68.0% | 28.4% | D+39.6 |
| Precinct -1802018020 | 1,469 | 570 | 68 | 2,107 | 69.7% | 27.1% | D+42.7 |
| Precinct -3000130001 | 1,517 | 535 | 53 | 2,105 | 72.1% | 25.4% | D+46.7 |
| Precinct -2605526055 | 1,558 | 480 | 56 | 2,094 | 74.4% | 22.9% | D+51.5 |
| Precinct -2602026020 | 1,642 | 357 | 84 | 2,083 | 78.8% | 17.1% | D+61.7 |
| Precinct -3740137401 | 1,753 | 269 | 57 | 2,079 | 84.3% | 12.9% | D+71.4 |
| Precinct -3502235022 | 1,515 | 501 | 49 | 2,065 | 73.4% | 24.3% | D+49.1 |
| Precinct -5602956029 | 1,462 | 536 | 66 | 2,064 | 70.8% | 26.0% | D+44.9 |
| Precinct -1500815008 | 1,323 | 612 | 94 | 2,029 | 65.2% | 30.2% | D+35.0 |
| Precinct -5603556035 | 1,387 | 568 | 55 | 2,010 | 69.0% | 28.3% | D+40.7 |
| Precinct -5802858028 | 1,396 | 548 | 63 | 2,007 | 69.6% | 27.3% | D+42.3 |
| Precinct -2101021010 | 1,561 | 383 | 62 | 2,006 | 77.8% | 19.1% | D+58.7 |
| Precinct -3101531015 | 1,500 | 424 | 77 | 2,001 | 75.0% | 21.2% | D+53.8 |
| Precinct -5601556015 | 1,357 | 574 | 59 | 1,990 | 68.2% | 28.8% | D+39.3 |
| Precinct -1500315003 | 1,251 | 647 | 90 | 1,988 | 62.9% | 32.5% | D+30.4 |
| Precinct -3500735007 | 1,459 | 457 | 64 | 1,980 | 73.7% | 23.1% | D+50.6 |
| Precinct -5202652026 | 1,388 | 534 | 56 | 1,978 | 70.2% | 27.0% | D+43.2 |
| Precinct -5201452014 | 1,284 | 612 | 81 | 1,977 | 64.9% | 31.0% | D+34.0 |
| Precinct -5600856008 | 1,310 | 602 | 65 | 1,977 | 66.3% | 30.5% | D+35.8 |
| Precinct -1801518015 | 1,328 | 537 | 75 | 1,940 | 68.5% | 27.7% | D+40.8 |
| Precinct -2601626016 | 1,423 | 449 | 62 | 1,934 | 73.6% | 23.2% | D+50.4 |
| Precinct -1400414004 | 1,326 | 526 | 61 | 1,913 | 69.3% | 27.5% | D+41.8 |
| Precinct -4640346403 | 1,369 | 467 | 75 | 1,911 | 71.6% | 24.4% | D+47.2 |
| Precinct -1001510015 | 1,445 | 399 | 51 | 1,895 | 76.3% | 21.1% | D+55.2 |
| Precinct -1801018010 | 1,382 | 423 | 71 | 1,876 | 73.7% | 22.5% | D+51.1 |
| Precinct -2601126011 | 1,350 | 456 | 63 | 1,869 | 72.2% | 24.4% | D+47.8 |
| Precinct -5600156001 | 1,226 | 569 | 60 | 1,855 | 66.1% | 30.7% | D+35.4 |
| Precinct -5710157101 | 1,272 | 512 | 60 | 1,844 | 69.0% | 27.8% | D+41.2 |
| Precinct -3600136001 | 1,404 | 355 | 65 | 1,824 | 77.0% | 19.5% | D+57.5 |
| Precinct -1500115001 | 1,148 | 603 | 63 | 1,814 | 63.3% | 33.2% | D+30.0 |
| Precinct -2600126001 | 1,306 | 431 | 57 | 1,794 | 72.8% | 24.0% | D+48.8 |
| Precinct -2201122011 | 1,289 | 430 | 69 | 1,788 | 72.1% | 24.0% | D+48.0 |
| Precinct -4000740007 | 1,398 | 331 | 56 | 1,785 | 78.3% | 18.5% | D+59.8 |
| Precinct -4602646026 | 1,386 | 345 | 54 | 1,785 | 77.6% | 19.3% | D+58.3 |
| Precinct -2600526005 | 1,273 | 409 | 61 | 1,743 | 73.0% | 23.5% | D+49.6 |
| Precinct -1000510005 | 1,299 | 378 | 56 | 1,733 | 75.0% | 21.8% | D+53.1 |
| Precinct -2100821008 | 1,361 | 325 | 47 | 1,733 | 78.5% | 18.8% | D+59.8 |
| Precinct -5202552025 | 1,180 | 465 | 86 | 1,731 | 68.2% | 26.9% | D+41.3 |
| Precinct -4640046400 | 1,274 | 398 | 55 | 1,727 | 73.8% | 23.0% | D+50.7 |
| Precinct -1400114001 | 1,033 | 624 | 61 | 1,718 | 60.1% | 36.3% | D+23.8 |
| Precinct -1800318003 | 1,218 | 449 | 49 | 1,716 | 71.0% | 26.2% | D+44.8 |
| Precinct -2101321013 | 1,310 | 345 | 58 | 1,713 | 76.5% | 20.1% | D+56.3 |
| Precinct -4601146011 | 1,393 | 274 | 41 | 1,708 | 81.6% | 16.0% | D+65.5 |
| Precinct -1801918019 | 1,197 | 453 | 57 | 1,707 | 70.1% | 26.5% | D+43.6 |
| Precinct -5201952019 | 1,157 | 467 | 78 | 1,702 | 68.0% | 27.4% | D+40.5 |
| Precinct -3500135001 | 1,250 | 376 | 68 | 1,694 | 73.8% | 22.2% | D+51.6 |
| Precinct -5600556005 | 1,135 | 494 | 64 | 1,693 | 67.0% | 29.2% | D+37.9 |
| Precinct -4600146001 | 1,270 | 351 | 49 | 1,670 | 76.0% | 21.0% | D+55.0 |
| Precinct -4602946029 | 1,289 | 329 | 49 | 1,667 | 77.3% | 19.7% | D+57.6 |
| Precinct -1002110021 | 1,115 | 482 | 60 | 1,657 | 67.3% | 29.1% | D+38.2 |
| Precinct -1803318033 | 1,105 | 485 | 61 | 1,651 | 66.9% | 29.4% | D+37.6 |
| Precinct -1000810008 | 1,219 | 357 | 67 | 1,643 | 74.2% | 21.7% | D+52.5 |
| Precinct -2200222002 | 1,160 | 386 | 68 | 1,614 | 71.9% | 23.9% | D+48.0 |
| Precinct -3400634006 | 1,299 | 273 | 34 | 1,606 | 80.9% | 17.0% | D+63.9 |
| Precinct -3302533025 | 1,165 | 389 | 45 | 1,599 | 72.9% | 24.3% | D+48.5 |
| Precinct -3900539005 | 1,201 | 322 | 39 | 1,562 | 76.9% | 20.6% | D+56.3 |
| Precinct -2606326063 | 1,062 | 442 | 51 | 1,555 | 68.3% | 28.4% | D+39.9 |
| Precinct -4001540015 | 1,168 | 326 | 59 | 1,553 | 75.2% | 21.0% | D+54.2 |
| Precinct -5600356003 | 1,160 | 337 | 52 | 1,549 | 74.9% | 21.8% | D+53.1 |
| Precinct -4000440004 | 1,205 | 265 | 52 | 1,522 | 79.2% | 17.4% | D+61.8 |
| Precinct -2602226022 | 1,168 | 297 | 56 | 1,521 | 76.8% | 19.5% | D+57.3 |
| Precinct -1001710017 | 1,155 | 309 | 40 | 1,504 | 76.8% | 20.5% | D+56.3 |
| Precinct -4601846018 | 1,135 | 317 | 46 | 1,498 | 75.8% | 21.2% | D+54.6 |
| Precinct -4601946019 | 1,212 | 229 | 45 | 1,486 | 81.6% | 15.4% | D+66.2 |
| Precinct -1001210012 | 1,056 | 358 | 68 | 1,482 | 71.3% | 24.2% | D+47.1 |
| Precinct -3500235002 | 1,078 | 349 | 51 | 1,478 | 72.9% | 23.6% | D+49.3 |
| Precinct -1803518035 | 985 | 422 | 48 | 1,455 | 67.7% | 29.0% | D+38.7 |
| Precinct -1800118001 | 1,027 | 375 | 46 | 1,448 | 70.9% | 25.9% | D+45.0 |
| Precinct -2600326003 | 1,034 | 368 | 31 | 1,433 | 72.2% | 25.7% | D+46.5 |
| Precinct -3711137111 | 1,107 | 278 | 31 | 1,416 | 78.2% | 19.6% | D+58.5 |
| Precinct -1001910019 | 1,015 | 330 | 43 | 1,388 | 73.1% | 23.8% | D+49.4 |
| Precinct -1000310003 | 1,057 | 281 | 39 | 1,377 | 76.8% | 20.4% | D+56.4 |
| Precinct -1700317003 | 1,129 | 207 | 39 | 1,375 | 82.1% | 15.1% | D+67.1 |
| Precinct -2605326053 | 1,029 | 290 | 47 | 1,366 | 75.3% | 21.2% | D+54.1 |
| Precinct -1000110001 | 1,016 | 301 | 48 | 1,365 | 74.4% | 22.1% | D+52.4 |
| Precinct -3720437204 | 1,092 | 240 | 32 | 1,364 | 80.1% | 17.6% | D+62.5 |
| Precinct -4400844008 | 1,167 | 137 | 38 | 1,342 | 87.0% | 10.2% | D+76.8 |
| Precinct -4602446024 | 1,024 | 267 | 39 | 1,330 | 77.0% | 20.1% | D+56.9 |
| Precinct -4601446014 | 1,009 | 274 | 43 | 1,326 | 76.1% | 20.7% | D+55.4 |
| Precinct -3502835028 | 897 | 361 | 41 | 1,299 | 69.1% | 27.8% | D+41.3 |
| Precinct -3500435004 | 950 | 302 | 45 | 1,297 | 73.2% | 23.3% | D+50.0 |
| Precinct -4705147051 | 949 | 313 | 30 | 1,292 | 73.5% | 24.2% | D+49.2 |
| Precinct -4000140001 | 975 | 265 | 43 | 1,283 | 76.0% | 20.7% | D+55.3 |
| Precinct -3400534005 | 987 | 246 | 40 | 1,273 | 77.5% | 19.3% | D+58.2 |
| Precinct -1000910009 | 931 | 287 | 28 | 1,246 | 74.7% | 23.0% | D+51.7 |
| Precinct -5803158031 | 858 | 325 | 46 | 1,229 | 69.8% | 26.4% | D+43.4 |
| Precinct -1201312013 | 891 | 282 | 41 | 1,214 | 73.4% | 23.2% | D+50.2 |
| Precinct -1200112001 | 828 | 335 | 42 | 1,205 | 68.7% | 27.8% | D+40.9 |
| Precinct -4600546005 | 908 | 237 | 49 | 1,194 | 76.0% | 19.8% | D+56.2 |
| Precinct -5603656036 | 830 | 322 | 38 | 1,190 | 69.7% | 27.1% | D+42.7 |
| Precinct -1200412004 | 790 | 332 | 42 | 1,164 | 67.9% | 28.5% | D+39.3 |
| Precinct -4750147501 | 859 | 264 | 37 | 1,160 | 74.1% | 22.8% | D+51.3 |
| Precinct -4601646016 | 886 | 231 | 39 | 1,156 | 76.6% | 20.0% | D+56.7 |
| Precinct -1700117001 | 838 | 256 | 49 | 1,143 | 73.3% | 22.4% | D+50.9 |
| Precinct -2200122001 | 788 | 285 | 56 | 1,129 | 69.8% | 25.2% | D+44.6 |
| Precinct -3710337103 | 838 | 214 | 29 | 1,081 | 77.5% | 19.8% | D+57.7 |
| Precinct -2601426014 | 757 | 282 | 41 | 1,080 | 70.1% | 26.1% | D+44.0 |
| Precinct -5202152021 | 704 | 314 | 38 | 1,056 | 66.7% | 29.7% | D+36.9 |
| Precinct -3101731017 | 778 | 218 | 46 | 1,042 | 74.7% | 20.9% | D+53.7 |
| Precinct -2100121001 | 760 | 247 | 30 | 1,037 | 73.3% | 23.8% | D+49.5 |
| Precinct -4750347503 | 818 | 161 | 43 | 1,022 | 80.0% | 15.8% | D+64.3 |
| Precinct -3502535025 | 743 | 239 | 37 | 1,019 | 72.9% | 23.5% | D+49.5 |
| Precinct -3300433004 | 782 | 182 | 36 | 1,000 | 78.2% | 18.2% | D+60.0 |
| Precinct -3741037410 | 849 | 108 | 28 | 985 | 86.2% | 11.0% | D+75.2 |
| Precinct -4605046050 | 753 | 182 | 49 | 984 | 76.5% | 18.5% | D+58.0 |
| Precinct -4750547505 | 758 | 179 | 35 | 972 | 78.0% | 18.4% | D+59.6 |
| Precinct -3734037340 | 710 | 222 | 29 | 961 | 73.9% | 23.1% | D+50.8 |
| Precinct -5601756017 | 658 | 271 | 26 | 955 | 68.9% | 28.4% | D+40.5 |
| Precinct -3900239002 | 773 | 149 | 30 | 952 | 81.2% | 15.7% | D+65.5 |
| Precinct -3720337203 | 728 | 176 | 34 | 938 | 77.6% | 18.8% | D+58.8 |
| Precinct -2100321003 | 671 | 219 | 28 | 918 | 73.1% | 23.9% | D+49.2 |
| Precinct -4401044010 | 722 | 157 | 30 | 909 | 79.4% | 17.3% | D+62.2 |
| Precinct -4600946009 | 717 | 154 | 37 | 908 | 79.0% | 17.0% | D+62.0 |
| Precinct -3302133021 | 656 | 225 | 23 | 904 | 72.6% | 24.9% | D+47.7 |
| Precinct -3300233002 | 653 | 225 | 21 | 899 | 72.6% | 25.0% | D+47.6 |
| Precinct -4400344003 | 673 | 185 | 22 | 880 | 76.5% | 21.0% | D+55.5 |
| Precinct -3000430004 | 559 | 286 | 12 | 857 | 65.2% | 33.4% | D+31.9 |
| Precinct -4400444004 | 645 | 151 | 41 | 837 | 77.1% | 18.0% | D+59.0 |
| Precinct -3000630006 | 586 | 201 | 27 | 814 | 72.0% | 24.7% | D+47.3 |
| Precinct -5202452024 | 593 | 180 | 29 | 802 | 73.9% | 22.4% | D+51.5 |
| Precinct -3302233022 | 529 | 213 | 25 | 767 | 69.0% | 27.8% | D+41.2 |
| Precinct -2104721047 | 590 | 144 | 28 | 762 | 77.4% | 18.9% | D+58.5 |
| Precinct -4750647506 | 599 | 141 | 20 | 760 | 78.8% | 18.6% | D+60.3 |
| Precinct -1802118021 | 497 | 213 | 27 | 737 | 67.4% | 28.9% | D+38.5 |
| Precinct -5802258022 | 521 | 175 | 27 | 723 | 72.1% | 24.2% | D+47.9 |
| Precinct -1710117101 | 498 | 191 | 24 | 713 | 69.8% | 26.8% | D+43.1 |
| Precinct -3710137101 | 536 | 148 | 28 | 712 | 75.3% | 20.8% | D+54.5 |
| Precinct -4705047050 | 549 | 146 | 14 | 709 | 77.4% | 20.6% | D+56.8 |
| Precinct -1200512005 | 442 | 232 | 28 | 702 | 63.0% | 33.0% | D+29.9 |
| Precinct -3735037350 | 488 | 183 | 26 | 697 | 70.0% | 26.3% | D+43.8 |
| Precinct -2100221002 | 494 | 163 | 37 | 694 | 71.2% | 23.5% | D+47.7 |
| Precinct -3103231032 | 555 | 117 | 21 | 693 | 80.1% | 16.9% | D+63.2 |
| Precinct -3800638006 | 509 | 149 | 25 | 683 | 74.5% | 21.8% | D+52.7 |
| Precinct -3800238002 | 501 | 139 | 16 | 656 | 76.4% | 21.2% | D+55.2 |
| Precinct -4603246032 | 475 | 124 | 24 | 623 | 76.2% | 19.9% | D+56.3 |
| Precinct -4400244002 | 502 | 86 | 18 | 606 | 82.8% | 14.2% | D+68.6 |
| Precinct -3300133001 | 451 | 108 | 11 | 570 | 79.1% | 18.9% | D+60.2 |
| Precinct -3713637136 | 426 | 120 | 15 | 561 | 75.9% | 21.4% | D+54.5 |
| Precinct -3103531035 | 415 | 132 | 13 | 560 | 74.1% | 23.6% | D+50.5 |
| Precinct -3900139001 | 451 | 70 | 17 | 538 | 83.8% | 13.0% | D+70.8 |
| Precinct -3801238012 | 395 | 113 | 14 | 522 | 75.7% | 21.6% | D+54.0 |
| Precinct -4748047480 | 446 | 60 | 14 | 520 | 85.8% | 11.5% | D+74.2 |
| Precinct -3500635006 | 365 | 131 | 13 | 509 | 71.7% | 25.7% | D+46.0 |
| Precinct -4600446004 | 369 | 119 | 16 | 504 | 73.2% | 23.6% | D+49.6 |
| Precinct -3800838008 | 318 | 158 | 17 | 493 | 64.5% | 32.0% | D+32.5 |
| Precinct -3711437114 | 383 | 92 | 16 | 491 | 78.0% | 18.7% | D+59.3 |
| Precinct -2100721007 | 392 | 86 | 10 | 488 | 80.3% | 17.6% | D+62.7 |
| Precinct -3760237602 | 384 | 79 | 11 | 474 | 81.0% | 16.7% | D+64.3 |
| Precinct -4400744007 | 394 | 56 | 16 | 466 | 84.5% | 12.0% | D+72.5 |
| Precinct -5300153001 | 325 | 125 | 16 | 466 | 69.7% | 26.8% | D+42.9 |
| Precinct -4001140011 | 348 | 95 | 20 | 463 | 75.2% | 20.5% | D+54.6 |
| Precinct -4607146071 | 325 | 110 | 21 | 456 | 71.3% | 24.1% | D+47.1 |
| Precinct -4600346003 | 315 | 127 | 11 | 453 | 69.5% | 28.0% | D+41.5 |
| Precinct -3601236012 | 340 | 89 | 22 | 451 | 75.4% | 19.7% | D+55.7 |
| Precinct -3703037030 | 343 | 86 | 14 | 443 | 77.4% | 19.4% | D+58.0 |
| Precinct -3742037420 | 363 | 69 | 10 | 442 | 82.1% | 15.6% | D+66.5 |
| Precinct -3737037370 | 328 | 87 | 16 | 431 | 76.1% | 20.2% | D+55.9 |
| Precinct -4400144001 | 359 | 57 | 13 | 429 | 83.7% | 13.3% | D+70.4 |
| Precinct -3736037360 | 227 | 137 | 15 | 379 | 59.9% | 36.1% | D+23.7 |
| Precinct -5606256062 | 261 | 98 | 6 | 365 | 71.5% | 26.8% | D+44.7 |
| Precinct -5710657106 | 259 | 70 | 15 | 344 | 75.3% | 20.3% | D+54.9 |
| Precinct -3730137301 | 186 | 148 | 5 | 339 | 54.9% | 43.7% | D+11.2 |
| Precinct -3602936029 | 246 | 55 | 7 | 308 | 79.9% | 17.9% | D+62.0 |
| Precinct -3800338003 | 193 | 97 | 8 | 298 | 64.8% | 32.6% | D+32.2 |
| Precinct -3737137371 | 246 | 44 | 6 | 296 | 83.1% | 14.9% | D+68.2 |
| Precinct -4700147001 | 219 | 72 | 4 | 295 | 74.2% | 24.4% | D+49.8 |
| Precinct -4404044040 | 250 | 33 | 9 | 292 | 85.6% | 11.3% | D+74.3 |
| Precinct -3800438004 | 211 | 64 | 9 | 284 | 74.3% | 22.5% | D+51.8 |
| Precinct -3710237102 | 206 | 56 | 5 | 267 | 77.2% | 21.0% | D+56.2 |
| Precinct -3103731037 | 195 | 58 | 9 | 262 | 74.4% | 22.1% | D+52.3 |
| Precinct -4403444034 | 226 | 29 | 6 | 261 | 86.6% | 11.1% | D+75.5 |
| Precinct -3800138001 | 168 | 44 | 13 | 225 | 74.7% | 19.6% | D+55.1 |
| Precinct -3604236042 | 167 | 51 | 4 | 222 | 75.2% | 23.0% | D+52.3 |
| Precinct -3700837008 | 162 | 45 | 13 | 220 | 73.6% | 20.5% | D+53.2 |
| Precinct -2606426064 | 136 | 60 | 9 | 205 | 66.3% | 29.3% | D+37.1 |
| Precinct -3302333023 | 158 | 33 | 5 | 196 | 80.6% | 16.8% | D+63.8 |
| Precinct -3300633006 | 152 | 35 | 6 | 193 | 78.8% | 18.1% | D+60.6 |
| Precinct -3300833008 | 134 | 50 | 9 | 193 | 69.4% | 25.9% | D+43.5 |
| Precinct -3743037430 | 156 | 30 | 6 | 192 | 81.3% | 15.6% | D+65.6 |
| Precinct -3740437404 | 160 | 25 | 6 | 191 | 83.8% | 13.1% | D+70.7 |
| Precinct -4403244032 | 140 | 31 | 14 | 185 | 75.7% | 16.8% | D+58.9 |
| Precinct -3603836038 | 138 | 34 | 10 | 182 | 75.8% | 18.7% | D+57.1 |
| Precinct -1801718017 | 120 | 39 | 2 | 161 | 74.5% | 24.2% | D+50.3 |
| Precinct -1205012050 | 107 | 26 | 11 | 144 | 74.3% | 18.1% | D+56.3 |
| Precinct -3801438014 | 91 | 40 | 8 | 139 | 65.5% | 28.8% | D+36.7 |
| Precinct -4611046110 | 108 | 29 | 2 | 139 | 77.7% | 20.9% | D+56.8 |
| Precinct -4403744037 | 113 | 13 | 9 | 135 | 83.7% | 9.6% | D+74.1 |
| Precinct -5710457104 | 94 | 29 | 10 | 133 | 70.7% | 21.8% | D+48.9 |
| Precinct -4605746057 | 99 | 25 | 2 | 126 | 78.6% | 19.8% | D+58.7 |
| Precinct -5300253002 | 83 | 20 | 7 | 110 | 75.5% | 18.2% | D+57.3 |
| Precinct -4710847108 | 84 | 18 | 7 | 109 | 77.1% | 16.5% | D+60.6 |
| Precinct -1806218062 | 81 | 25 | 2 | 108 | 75.0% | 23.1% | D+51.9 |
| Precinct -3001030010 | 79 | 24 | 1 | 104 | 76.0% | 23.1% | D+52.9 |
| Precinct -3304133041 | 79 | 15 | 5 | 99 | 79.8% | 15.2% | D+64.6 |
| Precinct -5203452034 | 78 | 18 | 3 | 99 | 78.8% | 18.2% | D+60.6 |
| Precinct -1780317803 | 62 | 33 | 3 | 98 | 63.3% | 33.7% | D+29.6 |
| Precinct -3802138021 | 68 | 24 | 2 | 94 | 72.3% | 25.5% | D+46.8 |
| Precinct -3737737377 | 74 | 16 | 3 | 93 | 79.6% | 17.2% | D+62.4 |
| Precinct -4750747507 | 66 | 23 | 1 | 90 | 73.3% | 25.6% | D+47.8 |
| Precinct -3602736027 | 61 | 26 | 2 | 89 | 68.5% | 29.2% | D+39.3 |
| Precinct -3300533005 | 52 | 31 | 5 | 88 | 59.1% | 35.2% | D+23.9 |
| Precinct -3800738007 | 47 | 26 | 1 | 74 | 63.5% | 35.1% | D+28.4 |
| Precinct -4400644006 | 40 | 29 | 2 | 71 | 56.3% | 40.8% | D+15.5 |
| Precinct -3401534015 | 56 | 10 | 3 | 69 | 81.2% | 14.5% | D+66.7 |
| Precinct -3401434014 | 50 | 10 | 4 | 64 | 78.1% | 15.6% | D+62.5 |
| Precinct -3603136031 | 42 | 14 | 2 | 58 | 72.4% | 24.1% | D+48.3 |
| Precinct -3712637126 | 43 | 7 | 3 | 53 | 81.1% | 13.2% | D+67.9 |
| Precinct -5710557105 | 34 | 15 | 4 | 53 | 64.2% | 28.3% | D+35.8 |
| Precinct -2770127701 | 29 | 16 | 1 | 46 | 63.0% | 34.8% | D+28.3 |
| Precinct -3603536035 | 36 | 9 | 1 | 46 | 78.3% | 19.6% | D+58.7 |
| Precinct -3802238022 | 32 | 10 | 1 | 43 | 74.4% | 23.3% | D+51.2 |
| Precinct -4612046120 | 31 | 12 | 0 | 43 | 72.1% | 27.9% | D+44.2 |
| Precinct -4605346053 | 29 | 11 | 1 | 41 | 70.7% | 26.8% | D+43.9 |
| Precinct -4403144031 | 36 | 0 | 1 | 37 | 97.3% | 0.0% | D+97.3 |
| Precinct -4614046140 | 26 | 10 | 0 | 36 | 72.2% | 27.8% | D+44.4 |
| Precinct -1807218072 | 27 | 8 | 0 | 35 | 77.1% | 22.9% | D+54.3 |
| Precinct -3103631036 | 33 | 2 | 0 | 35 | 94.3% | 5.7% | D+88.6 |
| Precinct -3760337603 | 24 | 10 | 1 | 35 | 68.6% | 28.6% | D+40.0 |
| Precinct -3730537305 | 19 | 13 | 1 | 33 | 57.6% | 39.4% | D+18.2 |
| Precinct -3401334013 | 24 | 3 | 2 | 29 | 82.8% | 10.3% | D+72.4 |
| Precinct -4640846408 | 26 | 3 | 0 | 29 | 89.7% | 10.3% | D+79.3 |
| Precinct -4404444044 | 15 | 8 | 1 | 24 | 62.5% | 33.3% | D+29.2 |
| Precinct -5204552045 | 19 | 3 | 1 | 23 | 82.6% | 13.0% | D+69.6 |
| Precinct -3711637116 | 12 | 10 | 0 | 22 | 54.5% | 45.5% | D+9.1 |
| Precinct -4404244042 | 20 | 2 | 0 | 22 | 90.9% | 9.1% | D+81.8 |
| Precinct -5204352043 | 11 | 8 | 1 | 20 | 55.0% | 40.0% | D+15.0 |
| Precinct -3743137431 | 5 | 13 | 0 | 18 | 27.8% | 72.2% | R+44.4 |
| Precinct -3790437904 | 18 | 0 | 0 | 18 | 100.0% | 0.0% | D+100.0 |
| Precinct -4601746017 | 13 | 4 | 1 | 18 | 72.2% | 22.2% | D+50.0 |
| Precinct -3750037500 | 14 | 3 | 0 | 17 | 82.4% | 17.6% | D+64.7 |
| Precinct -3701237012 | 12 | 4 | 0 | 16 | 75.0% | 25.0% | D+50.0 |
| Precinct -1710517105 | 4 | 11 | 0 | 15 | 26.7% | 73.3% | R+46.7 |
| Precinct -1003310033 | 0 | 0 | 0 | 0 | — | — | Even |
| Precinct -3603036030 | 0 | 0 | 0 | 0 | — | — | Even |
| Precinct -3604936049 | 0 | 0 | 0 | 0 | — | — | Even |
| Precinct -3700537005 | 0 | 0 | 0 | 0 | — | — | Even |
| Precinct -3701137011 | 0 | 0 | 0 | 0 | — | — | Even |
| Precinct -3713337133 | 0 | 0 | 0 | 0 | — | — | Even |
| Precinct -3738237382 | 0 | 0 | 0 | 0 | — | — | Even |
| Precinct -3791137911 | 0 | 0 | 0 | 0 | — | — | Even |
| Precinct -3792237922 | 0 | 0 | 0 | 0 | — | — | Even |
| Precinct -4403544035 | 0 | 0 | 0 | 0 | — | — | Even |
| Precinct -4404344043 | 0 | 0 | 0 | 0 | — | — | Even |
| Precinct -4614146141 | 0 | 0 | 0 | 0 | — | — | Even |
| Precinct -5204852048 | 0 | 0 | 0 | 0 | — | — | Even |
| Precinct -5790457904 | 0 | 0 | 0 | 0 | — | — | Even |
presidential history
Presidential margin, 1876–2024
Democratic minus Republican, by election
| Year | Margin (D minus R) |
|---|---|
| 1876 | −11.2% |
| 1880 | −2.7% |
| 1884 | −11.6% |
| 1888 | −6.7% |
| 1892 | −3.2% |
| 1896 | −23.6% |
| 1900 | −28.0% |
| 1904 | −41.3% |
| 1908 | −34.1% |
| 1912 | +46.5% |
| 1916 | −6.9% |
| 1920 | −51.4% |
| 1924 | −50.0% |
| 1928 | −18.9% |
| 1932 | +16.7% |
| 1936 | +32.6% |
| 1940 | +5.8% |
| 1944 | +1.5% |
| 1948 | −17.0% |
| 1952 | −26.6% |
| 1956 | −22.2% |
| 1960 | −3.7% |
| 1964 | +28.8% |
| 1968 | +3.5% |
| 1972 | −10.0% |
| 1976 | −6.2% |
| 1980 | −12.2% |
| 1984 | −5.0% |
| 1988 | +12.8% |
| 1992 | +26.8% |
| 1996 | +31.3% |
| 2000 | +33.3% |
| 2004 | +40.2% |
| 2008 | +48.7% |
| 2012 | +46.7% |
| 2016 | +57.2% |
| 2020 | +57.7% |
| 2024 | +50.3% |
DemocraticRepublican
Congressional elections · 2 Senate races
U.S. Senate
voter registration
Registered voters
By party of registration, over time
Party registration · 2024D+41.3
Presidential vote · 2024D+50.3
Registration leans Democratic; the presidential vote runs 9.0 points more Republican.
436,700 registered voters · 2024 · up from 430,809 in 2022
domestic migration
Who moves in and out
Net migration over time, and who arrivals are — where they came from and what those places vote
−4,110 net domestic migration · 2025
20112025
Net −93,535 over 2011–2025 · gain loss
Arrivals reported $166,409 in average income, against $246,051 for residents who stayed — 32% lower. (IRS SOI, 2022–23)
The places arrivals came from lean D+41.2 on average — 9.1 points more Republican-leaning than San Mateo County, CA itself (D+50.3).
Where arrivals came from lean of each source
- San Francisco County, CA4,514D+64.8
- Santa Clara County, CA3,879D+40.0
- Alameda County, CA2,026D+53.6
- Los Angeles County, CA977D+32.9
- Contra Costa County, CA839D+37.9
- San Diego County, CA439D+16.8
Where departures went households, 2022–23
- Santa Clara County, CA3,874
- San Francisco County, CA3,710
- Alameda County, CA2,498
- Contra Costa County, CA1,313
- Los Angeles County, CA900
- Sacramento County, CA635
Migration is one input to a place’s political change, not its cause — a shift can also come from residents changing their minds, generational turnover, or turnout. These figures describe the places people moved between; they do not measure how any mover voted.
| Year | Net domestic migration |
|---|---|
| 2011 | +550 |
| 2012 | +2,907 |
| 2013 | +780 |
| 2014 | −684 |
| 2015 | −2,252 |
| 2016 | −6,752 |
| 2017 | −7,632 |
| 2018 | −7,298 |
| 2019 | −8,953 |
| 2021 | −25,429 |
| 2022 | −18,103 |
| 2023 | −10,604 |
| 2024 | −5,955 |
| 2025 | −4,110 |
San Mateo County sits between San Francisco and Silicon Valley, combining high housing costs and a highly educated workforce with some of the most consistent Democratic margins on the California coast.
Across the recorded series it reached a Democratic high of 57.7 points in 2020 and a Republican high of 51.4 points in 1920. Between 2020 and 2024 the county moved 7.4 points toward the Republican candidate; the 2024 margin was 50.3 points.
A population of 742,340, a 35% non-Hispanic-white share, and a median household income of $158,855 describe the county. The county's voting pattern over the last decade is most similar to that of Contra Costa County and Santa Clara County.
Political twins — counties
The counties whose fingerprint — 2000–2024 trajectory, demographics, ancestry, religion — sits closest to this one, and why.
Contra Costa County
California
98.8twin score
% Asian2016–2024 trajectory
Santa Clara County
California
98.6twin score
2016–2020 trajectorymedian income% Asian
Alameda County
California
98.5twin score
2016–2024 trajectory% Asian
Twin score (0–100) = weighted cosine between tier-standardized fingerprints: presidential margins 2000–2024 with 12-yr trend and elasticity, ACS income, age, education, population and race, top reported ancestries, and religious adherence — chips name the closest-shared dimensions and the widest gap. Re-weight the groups in the twins explorer.
Browse places by community — income, education, race & ethnicity, language — all community cuts →
Compare two places, side by side
Twelve curated comparisons line up election history, demographics, and the divergence story for two places at a glance. Browse all comparisons →
Cite this page
All citations released under CC BY 4.0. Attribution: Akashic Intelligence.
San Mateo County, California. Akashic. https://akashic.app/county/06081/. Accessed May 20, 2026. License: CC BY 4.0.
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California at the ballot boxAll elections →
Frequently asked questions
How did San Mateo County, California vote in 2024?
In 2024, San Mateo County, California voted Democratic by 50.3 points (D+50.3), carried by the Democratic candidate. Out of 330,510 votes cast, 242,957 went Democratic and 76,616 went Republican.
When did San Mateo County, California last vote Republican?
The most recent presidential election in which San Mateo County, California voted Republican was 1984.
How many people live in San Mateo County, California?
San Mateo County, California has a population of 742,340 according to the 2024 American Community Survey 5-year estimates from the US Census Bureau.
What is the median household income in San Mateo County, California?
Median household income in San Mateo County, California is $158,855 — above the national median of $80,734. The California state median is $99,122.
What is the political history of San Mateo County, California?
Akashic tracks 38 presidential elections in San Mateo County, California from 1876 to 2024. Of those, 16 went Democratic and 21 went Republican.