Washington County, Oregon
Precinct data
Results by precinct
155 precincts · 297,949 votes
Precinct boundaries and identifiers are cycle-specific. This table does not join rows across years without a validated crosswalk.
| Precinct -329329 | 5,222 | 2,087 | 340 | 7,649 | 68.3% | 27.3% | D+41.0 |
|---|---|---|---|---|---|---|---|
| Precinct -389389 | 5,246 | 2,026 | 332 | 7,604 | 69.0% | 26.6% | D+42.3 |
| Precinct -405405 | 5,037 | 2,175 | 278 | 7,490 | 67.2% | 29.0% | D+38.2 |
| Precinct -340340 | 3,797 | 2,835 | 259 | 6,891 | 55.1% | 41.1% | D+14.0 |
| Precinct -402402 | 3,973 | 2,125 | 258 | 6,356 | 62.5% | 33.4% | D+29.1 |
| Precinct -350350 | 4,548 | 1,520 | 271 | 6,339 | 71.7% | 24.0% | D+47.8 |
| Precinct -362362 | 4,471 | 1,537 | 275 | 6,283 | 71.2% | 24.5% | D+46.7 |
| Precinct -404404 | 3,926 | 1,688 | 250 | 5,864 | 67.0% | 28.8% | D+38.2 |
| Precinct -395395 | 3,714 | 1,433 | 224 | 5,371 | 69.1% | 26.7% | D+42.5 |
| Precinct -327327 | 3,427 | 1,624 | 232 | 5,283 | 64.9% | 30.7% | D+34.1 |
| Precinct -319319 | 3,335 | 1,627 | 209 | 5,171 | 64.5% | 31.5% | D+33.0 |
| Precinct -338338 | 2,854 | 2,104 | 188 | 5,146 | 55.5% | 40.9% | D+14.6 |
| Precinct -339339 | 2,654 | 1,963 | 179 | 4,796 | 55.3% | 40.9% | D+14.4 |
| Precinct -424424 | 2,566 | 1,845 | 189 | 4,600 | 55.8% | 40.1% | D+15.7 |
| Precinct -365365 | 3,510 | 915 | 167 | 4,592 | 76.4% | 19.9% | D+56.5 |
| Precinct -409409 | 3,006 | 1,300 | 173 | 4,479 | 67.1% | 29.0% | D+38.1 |
| Precinct -307307 | 2,577 | 1,710 | 187 | 4,474 | 57.6% | 38.2% | D+19.4 |
| Precinct -384384 | 3,478 | 830 | 164 | 4,472 | 77.8% | 18.6% | D+59.2 |
| Precinct -364364 | 3,215 | 997 | 220 | 4,432 | 72.5% | 22.5% | D+50.0 |
| Precinct -434434 | 2,835 | 1,372 | 169 | 4,376 | 64.8% | 31.4% | D+33.4 |
| Precinct -309309 | 2,639 | 1,440 | 194 | 4,273 | 61.8% | 33.7% | D+28.1 |
| Precinct -367367 | 3,030 | 1,024 | 197 | 4,251 | 71.3% | 24.1% | D+47.2 |
| Precinct -335335 | 2,504 | 1,516 | 204 | 4,224 | 59.3% | 35.9% | D+23.4 |
| Precinct -435435 | 2,393 | 1,519 | 186 | 4,098 | 58.4% | 37.1% | D+21.3 |
| Precinct -382382 | 2,394 | 1,313 | 165 | 3,872 | 61.8% | 33.9% | D+27.9 |
| Precinct -379379 | 2,705 | 975 | 135 | 3,815 | 70.9% | 25.6% | D+45.3 |
| Precinct -368368 | 2,639 | 980 | 164 | 3,783 | 69.8% | 25.9% | D+43.9 |
| Precinct -318318 | 2,324 | 1,250 | 161 | 3,735 | 62.2% | 33.5% | D+28.8 |
| Precinct -333333 | 2,646 | 816 | 148 | 3,610 | 73.3% | 22.6% | D+50.7 |
| Precinct -400400 | 2,400 | 954 | 131 | 3,485 | 68.9% | 27.4% | D+41.5 |
| Precinct -420420 | 1,998 | 1,058 | 137 | 3,193 | 62.6% | 33.1% | D+29.4 |
| Precinct -351351 | 2,062 | 953 | 143 | 3,158 | 65.3% | 30.2% | D+35.1 |
| Precinct -423423 | 1,985 | 906 | 128 | 3,019 | 65.8% | 30.0% | D+35.7 |
| Precinct -418418 | 1,990 | 868 | 150 | 3,008 | 66.2% | 28.9% | D+37.3 |
| Precinct -380380 | 2,083 | 815 | 104 | 3,002 | 69.4% | 27.1% | D+42.2 |
| Precinct -336336 | 1,714 | 1,066 | 149 | 2,929 | 58.5% | 36.4% | D+22.1 |
| Precinct -397397 | 1,773 | 1,023 | 124 | 2,920 | 60.7% | 35.0% | D+25.7 |
| Precinct -363363 | 2,097 | 698 | 115 | 2,910 | 72.1% | 24.0% | D+48.1 |
| Precinct -360360 | 1,979 | 720 | 125 | 2,824 | 70.1% | 25.5% | D+44.6 |
| Precinct -344344 | 1,767 | 877 | 141 | 2,785 | 63.4% | 31.5% | D+32.0 |
| Precinct -429429 | 1,689 | 870 | 122 | 2,681 | 63.0% | 32.5% | D+30.5 |
| Precinct -442442 | 1,513 | 1,042 | 124 | 2,679 | 56.5% | 38.9% | D+17.6 |
| Precinct -343343 | 1,531 | 938 | 121 | 2,590 | 59.1% | 36.2% | D+22.9 |
| Precinct -302302 | 1,484 | 943 | 109 | 2,536 | 58.5% | 37.2% | D+21.3 |
| Precinct -332332 | 1,846 | 576 | 111 | 2,533 | 72.9% | 22.7% | D+50.1 |
| Precinct -358358 | 1,756 | 672 | 86 | 2,514 | 69.8% | 26.7% | D+43.1 |
| Precinct -331331 | 1,678 | 608 | 97 | 2,383 | 70.4% | 25.5% | D+44.9 |
| Precinct -439439 | 1,667 | 592 | 104 | 2,363 | 70.5% | 25.1% | D+45.5 |
| Precinct -359359 | 1,663 | 551 | 98 | 2,312 | 71.9% | 23.8% | D+48.1 |
| Precinct -430430 | 1,039 | 1,143 | 105 | 2,287 | 45.4% | 50.0% | R+4.5 |
| Precinct -377377 | 1,558 | 595 | 101 | 2,254 | 69.1% | 26.4% | D+42.7 |
| Precinct -436436 | 1,302 | 824 | 85 | 2,211 | 58.9% | 37.3% | D+21.6 |
| Precinct -353353 | 1,705 | 424 | 80 | 2,209 | 77.2% | 19.2% | D+58.0 |
| Precinct -399399 | 1,526 | 605 | 74 | 2,205 | 69.2% | 27.4% | D+41.8 |
| Precinct -433433 | 1,312 | 761 | 75 | 2,148 | 61.1% | 35.4% | D+25.7 |
| Precinct -330330 | 1,071 | 976 | 90 | 2,137 | 50.1% | 45.7% | D+4.4 |
| Precinct -390390 | 1,432 | 584 | 63 | 2,079 | 68.9% | 28.1% | D+40.8 |
| Precinct -370370 | 1,392 | 613 | 73 | 2,078 | 67.0% | 29.5% | D+37.5 |
| Precinct -361361 | 1,558 | 412 | 76 | 2,046 | 76.1% | 20.1% | D+56.0 |
| Precinct -371371 | 1,461 | 475 | 86 | 2,022 | 72.3% | 23.5% | D+48.8 |
| Precinct -406406 | 1,575 | 351 | 96 | 2,022 | 77.9% | 17.4% | D+60.5 |
| Precinct -386386 | 1,495 | 366 | 67 | 1,928 | 77.5% | 19.0% | D+58.6 |
| Precinct -326326 | 661 | 1,147 | 74 | 1,882 | 35.1% | 60.9% | R+25.8 |
| Precinct -401401 | 1,449 | 345 | 55 | 1,849 | 78.4% | 18.7% | D+59.7 |
| Precinct -354354 | 1,286 | 464 | 48 | 1,798 | 71.5% | 25.8% | D+45.7 |
| Precinct -419419 | 1,194 | 534 | 48 | 1,776 | 67.2% | 30.1% | D+37.2 |
| Precinct -376376 | 1,199 | 492 | 73 | 1,764 | 68.0% | 27.9% | D+40.1 |
| Precinct -320320 | 1,121 | 549 | 90 | 1,760 | 63.7% | 31.2% | D+32.5 |
| Precinct -398398 | 1,032 | 618 | 104 | 1,754 | 58.8% | 35.2% | D+23.6 |
| Precinct -412412 | 1,102 | 556 | 82 | 1,740 | 63.3% | 32.0% | D+31.4 |
| Precinct -301301 | 679 | 974 | 54 | 1,707 | 39.8% | 57.1% | R+17.3 |
| Precinct -316316 | 704 | 933 | 69 | 1,706 | 41.3% | 54.7% | R+13.4 |
| Precinct -312312 | 670 | 959 | 65 | 1,694 | 39.6% | 56.6% | R+17.1 |
| Precinct -372372 | 1,275 | 356 | 58 | 1,689 | 75.5% | 21.1% | D+54.4 |
| Precinct -356356 | 1,045 | 530 | 77 | 1,652 | 63.3% | 32.1% | D+31.2 |
| Precinct -369369 | 1,074 | 496 | 69 | 1,639 | 65.5% | 30.3% | D+35.3 |
| Precinct -366366 | 1,268 | 287 | 74 | 1,629 | 77.8% | 17.6% | D+60.2 |
| Precinct -383383 | 1,178 | 318 | 64 | 1,560 | 75.5% | 20.4% | D+55.1 |
| Precinct -455455 | 1,074 | 346 | 54 | 1,474 | 72.9% | 23.5% | D+49.4 |
| Precinct -440440 | 928 | 455 | 66 | 1,449 | 64.0% | 31.4% | D+32.6 |
| Precinct -413413 | 949 | 427 | 67 | 1,443 | 65.8% | 29.6% | D+36.2 |
| Precinct -403403 | 904 | 395 | 68 | 1,367 | 66.1% | 28.9% | D+37.2 |
| Precinct -355355 | 992 | 309 | 56 | 1,357 | 73.1% | 22.8% | D+50.3 |
| Precinct -428428 | 859 | 437 | 55 | 1,351 | 63.6% | 32.3% | D+31.2 |
| Precinct -410410 | 810 | 433 | 69 | 1,312 | 61.7% | 33.0% | D+28.7 |
| Precinct -411411 | 866 | 359 | 79 | 1,304 | 66.4% | 27.5% | D+38.9 |
| Precinct -427427 | 816 | 402 | 65 | 1,283 | 63.6% | 31.3% | D+32.3 |
| Precinct -352352 | 869 | 208 | 55 | 1,132 | 76.8% | 18.4% | D+58.4 |
| Precinct -337337 | 647 | 375 | 52 | 1,074 | 60.2% | 34.9% | D+25.3 |
| Precinct -304304 | 627 | 411 | 26 | 1,064 | 58.9% | 38.6% | D+20.3 |
| Precinct -451451 | 717 | 303 | 35 | 1,055 | 68.0% | 28.7% | D+39.2 |
| Precinct -305305 | 380 | 527 | 39 | 946 | 40.2% | 55.7% | R+15.5 |
| Precinct -378378 | 743 | 176 | 21 | 940 | 79.0% | 18.7% | D+60.3 |
| Precinct -328328 | 398 | 487 | 38 | 923 | 43.1% | 52.8% | R+9.6 |
| Precinct -407407 | 637 | 191 | 30 | 858 | 74.2% | 22.3% | D+52.0 |
| Precinct -415415 | 544 | 265 | 34 | 843 | 64.5% | 31.4% | D+33.1 |
| Precinct -416416 | 564 | 239 | 37 | 840 | 67.1% | 28.5% | D+38.7 |
| Precinct -396396 | 558 | 228 | 37 | 823 | 67.8% | 27.7% | D+40.1 |
| Precinct -357357 | 531 | 256 | 20 | 807 | 65.8% | 31.7% | D+34.1 |
| Precinct -431431 | 331 | 400 | 33 | 764 | 43.3% | 52.4% | R+9.0 |
| Precinct -448448 | 478 | 253 | 32 | 763 | 62.6% | 33.2% | D+29.5 |
| Precinct -385385 | 562 | 158 | 42 | 762 | 73.8% | 20.7% | D+53.0 |
| Precinct -311311 | 291 | 359 | 31 | 681 | 42.7% | 52.7% | R+10.0 |
| Precinct -425425 | 293 | 364 | 17 | 674 | 43.5% | 54.0% | R+10.5 |
| Precinct -393393 | 503 | 97 | 22 | 622 | 80.9% | 15.6% | D+65.3 |
| Precinct -310310 | 278 | 307 | 26 | 611 | 45.5% | 50.2% | R+4.7 |
| Precinct -306306 | 433 | 115 | 26 | 574 | 75.4% | 20.0% | D+55.4 |
| Precinct -349349 | 408 | 150 | 16 | 574 | 71.1% | 26.1% | D+44.9 |
| Precinct -414414 | 331 | 177 | 16 | 524 | 63.2% | 33.8% | D+29.4 |
| Precinct -324324 | 208 | 295 | 14 | 517 | 40.2% | 57.1% | R+16.8 |
| Precinct -438438 | 186 | 292 | 13 | 491 | 37.9% | 59.5% | R+21.6 |
| Precinct -421421 | 322 | 132 | 36 | 490 | 65.7% | 26.9% | D+38.8 |
| Precinct -315315 | 232 | 228 | 26 | 486 | 47.7% | 46.9% | D+0.8 |
| Precinct -381381 | 333 | 120 | 14 | 467 | 71.3% | 25.7% | D+45.6 |
| Precinct -426426 | 191 | 224 | 16 | 431 | 44.3% | 52.0% | R+7.7 |
| Precinct -417417 | 252 | 135 | 18 | 405 | 62.2% | 33.3% | D+28.9 |
| Precinct -391391 | 327 | 69 | 6 | 402 | 81.3% | 17.2% | D+64.2 |
| Precinct -303303 | 116 | 209 | 4 | 329 | 35.3% | 63.5% | R+28.3 |
| Precinct -373373 | 177 | 132 | 17 | 326 | 54.3% | 40.5% | D+13.8 |
| Precinct -321321 | 111 | 190 | 20 | 321 | 34.6% | 59.2% | R+24.6 |
| Precinct -408408 | 235 | 66 | 14 | 315 | 74.6% | 21.0% | D+53.7 |
| Precinct -314314 | 105 | 190 | 10 | 305 | 34.4% | 62.3% | R+27.9 |
| Precinct -432432 | 194 | 97 | 14 | 305 | 63.6% | 31.8% | D+31.8 |
| Precinct -341341 | 131 | 163 | 10 | 304 | 43.1% | 53.6% | R+10.5 |
| Precinct -449449 | 133 | 147 | 11 | 291 | 45.7% | 50.5% | R+4.8 |
| Precinct -447447 | 115 | 150 | 13 | 278 | 41.4% | 54.0% | R+12.6 |
| Precinct -346346 | 125 | 141 | 7 | 273 | 45.8% | 51.6% | R+5.9 |
| Precinct -375375 | 206 | 52 | 14 | 272 | 75.7% | 19.1% | D+56.6 |
| Precinct -322322 | 122 | 134 | 11 | 267 | 45.7% | 50.2% | R+4.5 |
| Precinct -394394 | 164 | 67 | 18 | 249 | 65.9% | 26.9% | D+39.0 |
| Precinct -388388 | 181 | 61 | 6 | 248 | 73.0% | 24.6% | D+48.4 |
| Precinct -450450 | 47 | 117 | 5 | 169 | 27.8% | 69.2% | R+41.4 |
| Precinct -317317 | 77 | 83 | 7 | 167 | 46.1% | 49.7% | R+3.6 |
| Precinct -325325 | 114 | 36 | 5 | 155 | 73.5% | 23.2% | D+50.3 |
| Precinct -308308 | 73 | 67 | 5 | 145 | 50.3% | 46.2% | D+4.1 |
| Precinct -334334 | 53 | 80 | 4 | 137 | 38.7% | 58.4% | R+19.7 |
| Precinct -444444 | 51 | 65 | 3 | 119 | 42.9% | 54.6% | R+11.8 |
| Precinct -392392 | 86 | 19 | 4 | 109 | 78.9% | 17.4% | D+61.5 |
| Precinct -446446 | 66 | 36 | 4 | 106 | 62.3% | 34.0% | D+28.3 |
| Precinct -452452 | 45 | 45 | 7 | 97 | 46.4% | 46.4% | Even |
| Precinct -441441 | 52 | 12 | 6 | 70 | 74.3% | 17.1% | D+57.1 |
| Precinct -342342 | 28 | 33 | 2 | 63 | 44.4% | 52.4% | R+7.9 |
| Precinct -437437 | 40 | 17 | 4 | 61 | 65.6% | 27.9% | D+37.7 |
| Precinct -347347 | 25 | 30 | 0 | 55 | 45.5% | 54.5% | R+9.1 |
| Precinct -345345 | 14 | 13 | 0 | 27 | 51.9% | 48.1% | D+3.7 |
| Precinct -348348 | 16 | 8 | 2 | 26 | 61.5% | 30.8% | D+30.8 |
| Precinct -387387 | 12 | 9 | 0 | 21 | 57.1% | 42.9% | D+14.3 |
| Precinct -454454 | 2 | 17 | 0 | 19 | 10.5% | 89.5% | R+78.9 |
| Precinct -422422 | 3 | 14 | 0 | 17 | 17.6% | 82.4% | R+64.7 |
| Precinct -443443 | 0 | 11 | 0 | 11 | 0.0% | 100.0% | R+100.0 |
| Precinct -453453 | 5 | 6 | 0 | 11 | 45.5% | 54.5% | R+9.1 |
| Precinct -374374 | 5 | 4 | 0 | 9 | 55.6% | 44.4% | D+11.1 |
| Precinct -456456 | 7 | 0 | 0 | 7 | 100.0% | 0.0% | D+100.0 |
| Precinct -313313 | 2 | 1 | 0 | 3 | 66.7% | 33.3% | D+33.3 |
| Precinct -445445 | 0 | 1 | 0 | 1 | 0.0% | 100.0% | R+100.0 |
presidential history
Presidential margin, 1892–2024
Democratic minus Republican, by election
| Year | Margin (D minus R) |
|---|---|
| 1892 | −43.4% |
| 1896 | −13.9% |
| 1900 | −18.4% |
| 1904 | −57.5% |
| 1908 | −31.2% |
| 1912 | +3.6% |
| 1916 | −17.5% |
| 1920 | −35.1% |
| 1924 | −23.0% |
| 1928 | −26.5% |
| 1932 | +22.7% |
| 1936 | +33.0% |
| 1940 | +1.5% |
| 1944 | −1.3% |
| 1948 | −9.4% |
| 1952 | −28.7% |
| 1956 | −22.1% |
| 1960 | −17.8% |
| 1964 | +16.5% |
| 1968 | −18.7% |
| 1972 | −21.4% |
| 1976 | −19.3% |
| 1980 | −17.3% |
| 1984 | −25.9% |
| 1988 | −5.6% |
| 1992 | +6.2% |
| 1996 | +7.1% |
| 2000 | +2.5% |
| 2004 | +6.0% |
| 2008 | +22.1% |
| 2012 | +17.4% |
| 2016 | +26.0% |
| 2020 | +34.6% |
| 2024 | +33.7% |
DemocraticRepublican
Congressional elections · 2 Senate races
U.S. Senate
| Year | Won | Democratic | Republican | Total |
|---|---|---|---|---|
| 2022 | D | 63.6%160,858 | 32.9%83,146 | 252,735 |
| 2020 | D | 64.7%202,073 | 31.3%97,799 | 312,209 |
voter registration
Registered voters
By party of registration, over time
Party registration · 2024D+17.6
Presidential vote · 2024D+33.7
Registration leans Democratic; the presidential vote runs 16 points more Republican.
403,106 registered voters · 2024 · up from 389,829 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
−2,070 net domestic migration · 2025
20112025
Net +1,738 over 2011–2025 · gain loss
Arrivals reported $83,875 in average income, against $114,181 for residents who stayed — 27% lower. (IRS SOI, 2022–23)
The places arrivals came from lean D+26.0 on average — 7.7 points more Republican-leaning than Washington County, OR itself (D+33.7).
Where arrivals came from lean of each source
- Multnomah County, OR4,496D+61.6
- Clackamas County, OR1,829D+9.8
- Clark County, WA720D+6.9
- Yamhill County, OR599R+6.1
- Marion County, OR565R+2.0
- Los Angeles County, CA453D+32.9
Where departures went households, 2022–23
- Multnomah County, OR4,318
- Clackamas County, OR2,049
- Clark County, WA1,206
- Yamhill County, OR867
- Marion County, OR663
- King County, WA510
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 | +2,249 |
| 2012 | +2,044 |
| 2013 | +1,642 |
| 2014 | +1,296 |
| 2015 | +4,886 |
| 2016 | +4,606 |
| 2017 | +532 |
| 2018 | +1,246 |
| 2019 | +478 |
| 2021 | −2,115 |
| 2022 | −6,624 |
| 2023 | −3,284 |
| 2024 | −3,148 |
| 2025 | −2,070 |
Washington County has shifted from competitive terrain to a reliable Democratic stronghold over two decades, driven by rapid population growth in the Hillsboro–Beaverton tech corridor and an increasingly diverse, college-educated electorate.
Across the recorded series it reached a Democratic high of 34.6 points in 2020 and a Republican high of 57.5 points in 1904. Between 2020 and 2024 the county moved 0.9 points toward the Republican candidate; the 2024 margin was 33.7 points.
A population of 603,947, a 60% non-Hispanic-white share, and a median household income of $107,772 describe the county. The county's voting pattern over the last decade is most similar to that of Arapahoe County and King County.
Political twins — counties
The counties whose fingerprint — 2000–2024 trajectory, demographics, ancestry, religion — sits closest to this one, and why.
Arapahoe County
Colorado
96.2twin score
2016–2024 trajectory12-yr trend≠ % Asian
King County
Washington
96.2twin score
2020–2024 trajectory% Asian12-yr trend≠ 2004 margin
Fairfax County
Virginia
95.6twin score
2016–2024 trajectory12-yr trend≠ median income
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 →
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All citations released under CC BY 4.0. Attribution: Akashic Intelligence.
Washington County, Oregon. Akashic. https://akashic.app/county/41067/. Accessed May 20, 2026. License: CC BY 4.0.
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Oregon at the ballot boxAll elections →
Frequently asked questions
How did Washington County, Oregon vote in 2024?
In 2024, Washington County, Oregon voted Democratic by 33.7 points (D+33.7), carried by the Democratic candidate. Out of 297,949 votes cast, 193,013 went Democratic and 92,590 went Republican.
When did Washington County, Oregon last vote Republican?
The most recent presidential election in which Washington County, Oregon voted Republican was 1988.
How many people live in Washington County, Oregon?
Washington County, Oregon has a population of 603,947 according to the 2024 American Community Survey 5-year estimates from the US Census Bureau.
What is the median household income in Washington County, Oregon?
Median household income in Washington County, Oregon is $107,772 — above the national median of $80,734. The Oregon state median is $83,011.
What is the political history of Washington County, Oregon?
Akashic tracks 38 presidential elections in Washington County, Oregon from 1876 to 2024. Of those, 13 went Democratic and 20 went Republican.