Ada County, Idaho
Precinct data
Results by precinct
197 precincts · 267,419 votes
Precinct boundaries and identifiers are cycle-specific. This table does not join rows across years without a validated crosswalk.
| Precinct -20012001 | 581 | 1,927 | 48 | 2,556 | 22.7% | 75.4% | R+52.7 |
|---|---|---|---|---|---|---|---|
| Precinct -20022002 | 622 | 1,783 | 39 | 2,444 | 25.5% | 73.0% | R+47.5 |
| Precinct -10011001 | 393 | 1,952 | 44 | 2,389 | 16.5% | 81.7% | R+65.3 |
| Precinct -14021402 | 329 | 2,006 | 39 | 2,374 | 13.9% | 84.5% | R+70.6 |
| Precinct -22172217 | 670 | 1,567 | 64 | 2,301 | 29.1% | 68.1% | R+39.0 |
| Precinct -10021002 | 325 | 1,925 | 25 | 2,275 | 14.3% | 84.6% | R+70.3 |
| Precinct -21202120 | 782 | 1,300 | 42 | 2,124 | 36.8% | 61.2% | R+24.4 |
| Precinct -23032303 | 463 | 1,597 | 58 | 2,118 | 21.9% | 75.4% | R+53.5 |
| Precinct -23022302 | 445 | 1,589 | 48 | 2,082 | 21.4% | 76.3% | R+54.9 |
| Precinct -22162216 | 439 | 1,572 | 62 | 2,073 | 21.2% | 75.8% | R+54.7 |
| Precinct -23042304 | 424 | 1,526 | 52 | 2,002 | 21.2% | 76.2% | R+55.0 |
| Precinct -18131813 | 1,263 | 673 | 49 | 1,985 | 63.6% | 33.9% | D+29.7 |
| Precinct -19061906 | 619 | 1,191 | 34 | 1,844 | 33.6% | 64.6% | R+31.0 |
| Precinct -22072207 | 636 | 1,155 | 46 | 1,837 | 34.6% | 62.9% | R+28.3 |
| Precinct -10031003 | 342 | 1,387 | 35 | 1,764 | 19.4% | 78.6% | R+59.2 |
| Precinct -21112111 | 594 | 1,135 | 27 | 1,756 | 33.8% | 64.6% | R+30.8 |
| Precinct -14081408 | 653 | 1,056 | 42 | 1,751 | 37.3% | 60.3% | R+23.0 |
| Precinct -10051005 | 395 | 1,277 | 40 | 1,712 | 23.1% | 74.6% | R+51.5 |
| Precinct -14041404 | 384 | 1,282 | 32 | 1,698 | 22.6% | 75.5% | R+52.9 |
| Precinct -22062206 | 531 | 1,113 | 50 | 1,694 | 31.3% | 65.7% | R+34.4 |
| Precinct -14031403 | 392 | 1,266 | 26 | 1,684 | 23.3% | 75.2% | R+51.9 |
| Precinct -21072107 | 504 | 1,126 | 46 | 1,676 | 30.1% | 67.2% | R+37.1 |
| Precinct -14121412 | 420 | 1,195 | 24 | 1,639 | 25.6% | 72.9% | R+47.3 |
| Precinct -22202220 | 667 | 916 | 41 | 1,624 | 41.1% | 56.4% | R+15.3 |
| Precinct -19051905 | 1,129 | 452 | 39 | 1,620 | 69.7% | 27.9% | D+41.8 |
| Precinct -22182218 | 622 | 922 | 49 | 1,593 | 39.0% | 57.9% | R+18.8 |
| Precinct -22012201 | 352 | 1,179 | 50 | 1,581 | 22.3% | 74.6% | R+52.3 |
| Precinct -19041904 | 1,172 | 331 | 59 | 1,562 | 75.0% | 21.2% | D+53.8 |
| Precinct -20122012 | 502 | 1,011 | 39 | 1,552 | 32.3% | 65.1% | R+32.8 |
| Precinct -10041004 | 285 | 1,217 | 44 | 1,546 | 18.4% | 78.7% | R+60.3 |
| Precinct -17011701 | 599 | 885 | 48 | 1,532 | 39.1% | 57.8% | R+18.7 |
| Precinct -16101610 | 844 | 630 | 57 | 1,531 | 55.1% | 41.1% | D+14.0 |
| Precinct -19211921 | 1,015 | 429 | 72 | 1,516 | 67.0% | 28.3% | D+38.7 |
| Precinct -20082008 | 495 | 973 | 43 | 1,511 | 32.8% | 64.4% | R+31.6 |
| Precinct -20042004 | 400 | 1,068 | 40 | 1,508 | 26.5% | 70.8% | R+44.3 |
| Precinct -22122212 | 528 | 936 | 41 | 1,505 | 35.1% | 62.2% | R+27.1 |
| Precinct -19111911 | 893 | 557 | 53 | 1,503 | 59.4% | 37.1% | D+22.4 |
| Precinct -21152115 | 507 | 962 | 34 | 1,503 | 33.7% | 64.0% | R+30.3 |
| Precinct -19171917 | 1,253 | 206 | 42 | 1,501 | 83.5% | 13.7% | D+69.8 |
| Precinct -15101510 | 717 | 734 | 45 | 1,496 | 47.9% | 49.1% | R+1.1 |
| Precinct -22212221 | 597 | 838 | 57 | 1,492 | 40.0% | 56.2% | R+16.2 |
| Precinct -14101410 | 596 | 855 | 33 | 1,484 | 40.2% | 57.6% | R+17.5 |
| Precinct -18201820 | 771 | 663 | 48 | 1,482 | 52.0% | 44.7% | D+7.3 |
| Precinct -19151915 | 1,130 | 278 | 52 | 1,460 | 77.4% | 19.0% | D+58.4 |
| Precinct -22142214 | 564 | 862 | 28 | 1,454 | 38.8% | 59.3% | R+20.5 |
| Precinct -14061406 | 437 | 989 | 27 | 1,453 | 30.1% | 68.1% | R+38.0 |
| Precinct -21142114 | 593 | 818 | 42 | 1,453 | 40.8% | 56.3% | R+15.5 |
| Precinct -18191819 | 541 | 864 | 36 | 1,441 | 37.5% | 60.0% | R+22.4 |
| Precinct -19221922 | 1,038 | 345 | 54 | 1,437 | 72.2% | 24.0% | D+48.2 |
| Precinct -15191519 | 593 | 788 | 53 | 1,434 | 41.4% | 55.0% | R+13.6 |
| Precinct -17161716 | 789 | 587 | 56 | 1,432 | 55.1% | 41.0% | D+14.1 |
| Precinct -16041604 | 945 | 453 | 31 | 1,429 | 66.1% | 31.7% | D+34.4 |
| Precinct -16171617 | 819 | 559 | 51 | 1,429 | 57.3% | 39.1% | D+18.2 |
| Precinct -15081508 | 676 | 713 | 39 | 1,428 | 47.3% | 49.9% | R+2.6 |
| Precinct -21022102 | 452 | 938 | 38 | 1,428 | 31.7% | 65.7% | R+34.0 |
| Precinct -21122112 | 435 | 951 | 41 | 1,427 | 30.5% | 66.6% | R+36.2 |
| Precinct -17101710 | 889 | 496 | 41 | 1,426 | 62.3% | 34.8% | D+27.6 |
| Precinct -22052205 | 499 | 880 | 47 | 1,426 | 35.0% | 61.7% | R+26.7 |
| Precinct -21182118 | 491 | 901 | 32 | 1,424 | 34.5% | 63.3% | R+28.8 |
| Precinct -16081608 | 1,018 | 359 | 45 | 1,422 | 71.6% | 25.2% | D+46.3 |
| Precinct -17031703 | 561 | 807 | 50 | 1,418 | 39.6% | 56.9% | R+17.3 |
| Precinct -14171417 | 440 | 947 | 24 | 1,411 | 31.2% | 67.1% | R+35.9 |
| Precinct -18101810 | 925 | 428 | 50 | 1,403 | 65.9% | 30.5% | D+35.4 |
| Precinct -16021602 | 834 | 542 | 25 | 1,401 | 59.5% | 38.7% | D+20.8 |
| Precinct -20152015 | 459 | 888 | 45 | 1,392 | 33.0% | 63.8% | R+30.8 |
| Precinct -18071807 | 917 | 437 | 29 | 1,383 | 66.3% | 31.6% | D+34.7 |
| Precinct -19241924 | 909 | 435 | 37 | 1,381 | 65.8% | 31.5% | D+34.3 |
| Precinct -14151415 | 378 | 977 | 23 | 1,378 | 27.4% | 70.9% | R+43.5 |
| Precinct -15011501 | 582 | 745 | 51 | 1,378 | 42.2% | 54.1% | R+11.8 |
| Precinct -20202020 | 507 | 829 | 42 | 1,378 | 36.8% | 60.2% | R+23.4 |
| Precinct -21162116 | 401 | 930 | 40 | 1,371 | 29.2% | 67.8% | R+38.6 |
| Precinct -17061706 | 805 | 510 | 51 | 1,366 | 58.9% | 37.3% | D+21.6 |
| Precinct -19021902 | 559 | 770 | 37 | 1,366 | 40.9% | 56.4% | R+15.4 |
| Precinct -20172017 | 475 | 841 | 49 | 1,365 | 34.8% | 61.6% | R+26.8 |
| Precinct -21132113 | 508 | 817 | 40 | 1,365 | 37.2% | 59.9% | R+22.6 |
| Precinct -14111411 | 494 | 832 | 36 | 1,362 | 36.3% | 61.1% | R+24.8 |
| Precinct -19141914 | 990 | 329 | 42 | 1,361 | 72.7% | 24.2% | D+48.6 |
| Precinct -15091509 | 699 | 607 | 54 | 1,360 | 51.4% | 44.6% | D+6.8 |
| Precinct -20182018 | 509 | 818 | 33 | 1,360 | 37.4% | 60.1% | R+22.7 |
| Precinct -14051405 | 326 | 1,006 | 26 | 1,358 | 24.0% | 74.1% | R+50.1 |
| Precinct -18171817 | 750 | 555 | 52 | 1,357 | 55.3% | 40.9% | D+14.4 |
| Precinct -21092109 | 513 | 790 | 53 | 1,356 | 37.8% | 58.3% | R+20.4 |
| Precinct -16051605 | 883 | 436 | 36 | 1,355 | 65.2% | 32.2% | D+33.0 |
| Precinct -22082208 | 477 | 840 | 36 | 1,353 | 35.3% | 62.1% | R+26.8 |
| Precinct -15041504 | 642 | 677 | 29 | 1,348 | 47.6% | 50.2% | R+2.6 |
| Precinct -14011401 | 325 | 995 | 24 | 1,344 | 24.2% | 74.0% | R+49.9 |
| Precinct -23012301 | 285 | 1,022 | 33 | 1,340 | 21.3% | 76.3% | R+55.0 |
| Precinct -23072307 | 257 | 1,050 | 33 | 1,340 | 19.2% | 78.4% | R+59.2 |
| Precinct -18051805 | 846 | 447 | 45 | 1,338 | 63.2% | 33.4% | D+29.8 |
| Precinct -22112211 | 476 | 816 | 43 | 1,335 | 35.7% | 61.1% | R+25.5 |
| Precinct -15031503 | 585 | 708 | 37 | 1,330 | 44.0% | 53.2% | R+9.2 |
| Precinct -16151615 | 782 | 491 | 56 | 1,329 | 58.8% | 36.9% | D+21.9 |
| Precinct -16061606 | 907 | 385 | 35 | 1,327 | 68.3% | 29.0% | D+39.3 |
| Precinct -19231923 | 1,056 | 241 | 29 | 1,326 | 79.6% | 18.2% | D+61.5 |
| Precinct -20092009 | 560 | 724 | 41 | 1,325 | 42.3% | 54.6% | R+12.4 |
| Precinct -19031903 | 822 | 466 | 34 | 1,322 | 62.2% | 35.2% | D+26.9 |
| Precinct -17131713 | 916 | 375 | 29 | 1,320 | 69.4% | 28.4% | D+41.0 |
| Precinct -19091909 | 686 | 586 | 48 | 1,320 | 52.0% | 44.4% | D+7.6 |
| Precinct -16091609 | 679 | 602 | 37 | 1,318 | 51.5% | 45.7% | D+5.8 |
| Precinct -14131413 | 326 | 962 | 29 | 1,317 | 24.8% | 73.0% | R+48.3 |
| Precinct -20162016 | 491 | 790 | 36 | 1,317 | 37.3% | 60.0% | R+22.7 |
| Precinct -15071507 | 589 | 697 | 30 | 1,316 | 44.8% | 53.0% | R+8.2 |
| Precinct -16071607 | 847 | 423 | 40 | 1,310 | 64.7% | 32.3% | D+32.4 |
| Precinct -17121712 | 892 | 361 | 57 | 1,310 | 68.1% | 27.6% | D+40.5 |
| Precinct -18181818 | 784 | 484 | 34 | 1,302 | 60.2% | 37.2% | D+23.0 |
| Precinct -17021702 | 504 | 767 | 30 | 1,301 | 38.7% | 59.0% | R+20.2 |
| Precinct -18121812 | 821 | 440 | 37 | 1,298 | 63.3% | 33.9% | D+29.4 |
| Precinct -19071907 | 577 | 679 | 36 | 1,292 | 44.7% | 52.6% | R+7.9 |
| Precinct -18111811 | 874 | 391 | 25 | 1,290 | 67.8% | 30.3% | D+37.4 |
| Precinct -15171517 | 620 | 642 | 25 | 1,287 | 48.2% | 49.9% | R+1.7 |
| Precinct -22022202 | 402 | 864 | 21 | 1,287 | 31.2% | 67.1% | R+35.9 |
| Precinct -17191719 | 716 | 531 | 38 | 1,285 | 55.7% | 41.3% | D+14.4 |
| Precinct -17041704 | 558 | 682 | 43 | 1,283 | 43.5% | 53.2% | R+9.7 |
| Precinct -22042204 | 422 | 830 | 29 | 1,281 | 32.9% | 64.8% | R+31.9 |
| Precinct -17051705 | 577 | 655 | 45 | 1,277 | 45.2% | 51.3% | R+6.1 |
| Precinct -20132013 | 469 | 787 | 19 | 1,275 | 36.8% | 61.7% | R+24.9 |
| Precinct -20142014 | 390 | 839 | 46 | 1,275 | 30.6% | 65.8% | R+35.2 |
| Precinct -15131513 | 584 | 647 | 42 | 1,273 | 45.9% | 50.8% | R+4.9 |
| Precinct -16031603 | 712 | 507 | 50 | 1,269 | 56.1% | 40.0% | D+16.2 |
| Precinct -20192019 | 488 | 741 | 38 | 1,267 | 38.5% | 58.5% | R+20.0 |
| Precinct -22192219 | 461 | 769 | 37 | 1,267 | 36.4% | 60.7% | R+24.3 |
| Precinct -19181918 | 1,040 | 173 | 50 | 1,263 | 82.3% | 13.7% | D+68.6 |
| Precinct -23102310 | 280 | 946 | 32 | 1,258 | 22.3% | 75.2% | R+52.9 |
| Precinct -23062306 | 347 | 865 | 44 | 1,256 | 27.6% | 68.9% | R+41.2 |
| Precinct -15061506 | 530 | 682 | 43 | 1,255 | 42.2% | 54.3% | R+12.1 |
| Precinct -19121912 | 811 | 406 | 35 | 1,252 | 64.8% | 32.4% | D+32.3 |
| Precinct -16111611 | 601 | 598 | 51 | 1,250 | 48.1% | 47.8% | D+0.2 |
| Precinct -22102210 | 599 | 603 | 46 | 1,248 | 48.0% | 48.3% | R+0.3 |
| Precinct -18161816 | 679 | 531 | 37 | 1,247 | 54.5% | 42.6% | D+11.9 |
| Precinct -20052005 | 424 | 786 | 37 | 1,247 | 34.0% | 63.0% | R+29.0 |
| Precinct -23082308 | 324 | 891 | 30 | 1,245 | 26.0% | 71.6% | R+45.5 |
| Precinct -19101910 | 703 | 511 | 30 | 1,244 | 56.5% | 41.1% | D+15.4 |
| Precinct -21172117 | 367 | 838 | 26 | 1,231 | 29.8% | 68.1% | R+38.3 |
| Precinct -19191919 | 919 | 264 | 47 | 1,230 | 74.7% | 21.5% | D+53.3 |
| Precinct -17181718 | 741 | 442 | 45 | 1,228 | 60.3% | 36.0% | D+24.3 |
| Precinct -21062106 | 421 | 773 | 30 | 1,224 | 34.4% | 63.2% | R+28.8 |
| Precinct -16141614 | 629 | 545 | 49 | 1,223 | 51.4% | 44.6% | D+6.9 |
| Precinct -14091409 | 437 | 756 | 25 | 1,218 | 35.9% | 62.1% | R+26.2 |
| Precinct -18061806 | 770 | 408 | 40 | 1,218 | 63.2% | 33.5% | D+29.7 |
| Precinct -21032103 | 403 | 776 | 37 | 1,216 | 33.1% | 63.8% | R+30.7 |
| Precinct -23052305 | 340 | 833 | 43 | 1,216 | 28.0% | 68.5% | R+40.5 |
| Precinct -15121512 | 558 | 625 | 32 | 1,215 | 45.9% | 51.4% | R+5.5 |
| Precinct -19011901 | 321 | 866 | 22 | 1,209 | 26.6% | 71.6% | R+45.1 |
| Precinct -22132213 | 512 | 647 | 44 | 1,203 | 42.6% | 53.8% | R+11.2 |
| Precinct -17141714 | 661 | 493 | 46 | 1,200 | 55.1% | 41.1% | D+14.0 |
| Precinct -17171717 | 678 | 463 | 55 | 1,196 | 56.7% | 38.7% | D+18.0 |
| Precinct -18081808 | 657 | 492 | 47 | 1,196 | 54.9% | 41.1% | D+13.8 |
| Precinct -20112011 | 365 | 815 | 16 | 1,196 | 30.5% | 68.1% | R+37.6 |
| Precinct -16181618 | 644 | 511 | 36 | 1,191 | 54.1% | 42.9% | D+11.2 |
| Precinct -15181518 | 545 | 607 | 29 | 1,181 | 46.1% | 51.4% | R+5.2 |
| Precinct -20102010 | 357 | 798 | 26 | 1,181 | 30.2% | 67.6% | R+37.3 |
| Precinct -21042104 | 385 | 763 | 32 | 1,180 | 32.6% | 64.7% | R+32.0 |
| Precinct -15201520 | 536 | 603 | 37 | 1,176 | 45.6% | 51.3% | R+5.7 |
| Precinct -16161616 | 620 | 514 | 37 | 1,171 | 52.9% | 43.9% | D+9.1 |
| Precinct -19131913 | 815 | 326 | 30 | 1,171 | 69.6% | 27.8% | D+41.8 |
| Precinct -20062006 | 436 | 705 | 29 | 1,170 | 37.3% | 60.3% | R+23.0 |
| Precinct -15051505 | 490 | 634 | 44 | 1,168 | 42.0% | 54.3% | R+12.3 |
| Precinct -17091709 | 788 | 337 | 42 | 1,167 | 67.5% | 28.9% | D+38.6 |
| Precinct -15141514 | 587 | 540 | 39 | 1,166 | 50.3% | 46.3% | D+4.0 |
| Precinct -17081708 | 697 | 422 | 44 | 1,163 | 59.9% | 36.3% | D+23.6 |
| Precinct -21082108 | 387 | 745 | 27 | 1,159 | 33.4% | 64.3% | R+30.9 |
| Precinct -16011601 | 583 | 542 | 33 | 1,158 | 50.3% | 46.8% | D+3.5 |
| Precinct -17071707 | 682 | 431 | 28 | 1,141 | 59.8% | 37.8% | D+22.0 |
| Precinct -15161516 | 517 | 598 | 25 | 1,140 | 45.4% | 52.5% | R+7.1 |
| Precinct -22152215 | 441 | 658 | 36 | 1,135 | 38.9% | 58.0% | R+19.1 |
| Precinct -20072007 | 389 | 717 | 26 | 1,132 | 34.4% | 63.3% | R+29.0 |
| Precinct -15151515 | 556 | 538 | 35 | 1,129 | 49.2% | 47.7% | D+1.6 |
| Precinct -16131613 | 507 | 585 | 37 | 1,129 | 44.9% | 51.8% | R+6.9 |
| Precinct -19161916 | 906 | 184 | 36 | 1,126 | 80.5% | 16.3% | D+64.1 |
| Precinct -19201920 | 751 | 326 | 43 | 1,120 | 67.1% | 29.1% | D+37.9 |
| Precinct -18031803 | 699 | 385 | 31 | 1,115 | 62.7% | 34.5% | D+28.2 |
| Precinct -16191619 | 662 | 414 | 37 | 1,113 | 59.5% | 37.2% | D+22.3 |
| Precinct -18091809 | 776 | 296 | 37 | 1,109 | 70.0% | 26.7% | D+43.3 |
| Precinct -15021502 | 516 | 540 | 42 | 1,098 | 47.0% | 49.2% | R+2.2 |
| Precinct -20032003 | 349 | 716 | 32 | 1,097 | 31.8% | 65.3% | R+33.5 |
| Precinct -14141414 | 319 | 750 | 27 | 1,096 | 29.1% | 68.4% | R+39.3 |
| Precinct -17111711 | 681 | 362 | 49 | 1,092 | 62.4% | 33.2% | D+29.2 |
| Precinct -21192119 | 344 | 708 | 31 | 1,083 | 31.8% | 65.4% | R+33.6 |
| Precinct -15111511 | 480 | 568 | 34 | 1,082 | 44.4% | 52.5% | R+8.1 |
| Precinct -18141814 | 645 | 397 | 40 | 1,082 | 59.6% | 36.7% | D+22.9 |
| Precinct -21052105 | 368 | 676 | 35 | 1,079 | 34.1% | 62.7% | R+28.5 |
| Precinct -17151715 | 525 | 500 | 48 | 1,073 | 48.9% | 46.6% | D+2.3 |
| Precinct -22092209 | 399 | 639 | 25 | 1,063 | 37.5% | 60.1% | R+22.6 |
| Precinct -21102110 | 428 | 593 | 35 | 1,056 | 40.5% | 56.2% | R+15.6 |
| Precinct -18041804 | 649 | 371 | 34 | 1,054 | 61.6% | 35.2% | D+26.4 |
| Precinct -16121612 | 608 | 402 | 17 | 1,027 | 59.2% | 39.1% | D+20.1 |
| Precinct -21012101 | 267 | 724 | 27 | 1,018 | 26.2% | 71.1% | R+44.9 |
| Precinct -19081908 | 447 | 512 | 32 | 991 | 45.1% | 51.7% | R+6.6 |
| Precinct -22032203 | 314 | 643 | 26 | 983 | 31.9% | 65.4% | R+33.5 |
| Precinct -19251925 | 643 | 305 | 31 | 979 | 65.7% | 31.2% | D+34.5 |
| Precinct -14071407 | 315 | 618 | 35 | 968 | 32.5% | 63.8% | R+31.3 |
| Precinct -10061006 | 196 | 714 | 17 | 927 | 21.1% | 77.0% | R+55.9 |
| Precinct -18151815 | 491 | 403 | 30 | 924 | 53.1% | 43.6% | D+9.5 |
| Precinct -18011801 | 539 | 338 | 34 | 911 | 59.2% | 37.1% | D+22.1 |
| Precinct -18021802 | 587 | 273 | 30 | 890 | 66.0% | 30.7% | D+35.3 |
| Precinct -14161416 | 236 | 346 | 16 | 598 | 39.5% | 57.9% | R+18.4 |
| Precinct -23092309 | 9 | 120 | 2 | 131 | 6.9% | 91.6% | R+84.7 |
presidential history
Presidential margin, 1892–2024
Democratic minus Republican, by election
| Year | Margin (D minus R) |
|---|---|
| 1892 | −41.4% |
| 1896 | +28.2% |
| 1900 | −12.9% |
| 1904 | −47.0% |
| 1908 | −11.7% |
| 1912 | −6.3% |
| 1916 | −0.8% |
| 1920 | −33.6% |
| 1924 | −37.5% |
| 1928 | −44.4% |
| 1932 | +4.5% |
| 1936 | +21.6% |
| 1940 | −1.9% |
| 1944 | −11.4% |
| 1948 | −13.9% |
| 1952 | −45.4% |
| 1956 | −39.9% |
| 1960 | −23.9% |
| 1964 | −12.8% |
| 1968 | −39.0% |
| 1972 | −44.1% |
| 1976 | −31.3% |
| 1980 | −39.1% |
| 1984 | −46.2% |
| 1988 | −28.0% |
| 1992 | −15.5% |
| 1996 | −15.9% |
| 2000 | −27.9% |
| 2004 | −23.3% |
| 2008 | −6.1% |
| 2012 | −11.3% |
| 2016 | −9.2% |
| 2020 | −3.9% |
| 2024 | −10.3% |
DemocraticRepublican
Congressional elections · 2 Senate races
U.S. Senate
| Year | Won | Democratic | Republican | Total |
|---|---|---|---|---|
| 2022 | R | 41.5%153,312 | 47.5%175,158 | 369,042 |
| 2020 | R | 46.0%118,718 | 50.6%130,446 | 258,014 |
voter registration
Registered voters
By party of registration, over time
Party registration · 2024R+30.8
Presidential vote · 2024R+10.3
Registration leans Republican; the presidential vote runs 21 points more Republican.
DemocraticRepublicanUnaffiliatedOther parties
| Year | Total registered | Democratic | Republican | Unaffiliated | Other |
|---|---|---|---|---|---|
| 2018 | 247,421 | 44,814 | 103,822 | 95,329 | 3,456 |
| 2020 | 300,208 | 60,045 | 125,925 | 109,843 | 4,395 |
| 2022 | 304,595 | 56,157 | 147,495 | 96,113 | 4,830 |
| 2024 | 324,653 | 59,727 | 159,876 | 99,920 | 5,130 |
domestic migration
Who moves in and out
Net migration over time, and who arrivals are — where they came from and what those places vote
+8,528 net domestic migration · 2025
20112025
Net +97,556 over 2011–2025 · gain loss
Arrivals reported $81,917 in average income, against $114,830 for residents who stayed — 29% lower. (IRS SOI, 2022–23)
The places arrivals came from lean R+11.6 on average — 1.3 points more Republican-leaning than Ada County, ID itself (R+10.3).
Where arrivals came from lean of each source
- Canyon County, ID2,868R+46.6
- Orange County, CA441D+2.7
- Los Angeles County, CA440D+32.9
- King County, WA367D+51.3
- San Diego County, CA358D+16.8
- Maricopa County, AZ347R+3.5
Where departures went households, 2022–23
- Canyon County, ID3,601
- Maricopa County, AZ334
- King County, WA266
- Elmore County, ID227
- Salt Lake County, UT217
- Gem County, ID216
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 | +4,420 |
| 2012 | +4,526 |
| 2013 | +3,943 |
| 2014 | +6,311 |
| 2015 | +3,825 |
| 2016 | +8,307 |
| 2017 | +9,512 |
| 2018 | +10,332 |
| 2019 | +10,815 |
| 2021 | +14,277 |
| 2022 | +4,831 |
| 2023 | +2,820 |
| 2024 | +5,109 |
| 2025 | +8,528 |
Ada County anchors Idaho's Treasure Valley and has grown rapidly through in-migration, yet its 2024 presidential margin of R+10.3 suggests that newcomer growth has not flipped its partisan lean the way similar Sun Belt metros have.
Across the recorded series it reached a Democratic high of 28.2 points in 1896 and a Republican high of 47.0 points in 1904. Between 2020 and 2024 the county moved 6.4 points toward the Republican candidate; the 2024 margin was 10.3 points.
A population of 518,935, a 81% non-Hispanic-white share, and a median household income of $91,502 describe the county. The county's voting pattern over the last decade is most similar to that of Gallatin County and Salt Lake County.
Political twins — counties
The counties whose fingerprint — 2000–2024 trajectory, demographics, ancestry, religion — sits closest to this one, and why.
Gallatin County
Montana
88.2twin score
12-yr trendcollege sharemedian income≠ % unaffiliated
Salt Lake County
Utah
86.8twin score
population scaleelasticitycollege share≠ 12-yr trend
Johnson County
Kansas
86.6twin score
population scale2016–2024 trajectory≠ 12-yr trend
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.
Ada County, Idaho. Akashic. https://akashic.app/county/16001/. Accessed May 20, 2026. License: CC BY 4.0.
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Cities & towns in Ada County
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Frequently asked questions
How did Ada County, Idaho vote in 2024?
In 2024, Ada County, Idaho voted Republican by 10.3 points (R+10.3), carried by the Republican candidate. Out of 267,419 votes cast, 116,116 went Democratic and 143,759 went Republican.
When did Ada County, Idaho last vote Democratic?
The most recent presidential election in which Ada County, Idaho voted Democratic was 1936.
How many people live in Ada County, Idaho?
Ada County, Idaho has a population of 518,935 according to the 2024 American Community Survey 5-year estimates from the US Census Bureau.
What is the median household income in Ada County, Idaho?
Median household income in Ada County, Idaho is $91,502 — above the national median of $80,734. The Idaho state median is $77,800.
What is the political history of Ada County, Idaho?
Akashic tracks 38 presidential elections in Ada County, Idaho from 1876 to 2024. Of those, 3 went Democratic and 29 went Republican.