Canyon County, Idaho
Precinct data
Results by precinct
51 precincts · 101,030 votes
Precinct boundaries and identifiers are cycle-specific. This table does not join rows across years without a validated crosswalk.
| Precinct -12101210 | 800 | 2,909 | 70 | 3,779 | 21.2% | 77.0% | R+55.8 |
|---|---|---|---|---|---|---|---|
| Precinct -33123312 | 927 | 2,710 | 92 | 3,729 | 24.9% | 72.7% | R+47.8 |
| Precinct -09100910 | 620 | 2,985 | 85 | 3,690 | 16.8% | 80.9% | R+64.1 |
| Precinct -10101010 | 514 | 2,966 | 81 | 3,561 | 14.4% | 83.3% | R+68.9 |
| Precinct -38133813 | 782 | 2,601 | 74 | 3,457 | 22.6% | 75.2% | R+52.6 |
| Precinct -23112311 | 1,015 | 2,082 | 112 | 3,209 | 31.6% | 64.9% | R+33.3 |
| Precinct -32123212 | 959 | 2,147 | 93 | 3,199 | 30.0% | 67.1% | R+37.1 |
| Precinct -17101710 | 913 | 2,165 | 97 | 3,175 | 28.8% | 68.2% | R+39.4 |
| Precinct -35123512 | 881 | 2,221 | 67 | 3,169 | 27.8% | 70.1% | R+42.3 |
| Precinct -44134413 | 741 | 2,333 | 74 | 3,148 | 23.5% | 74.1% | R+50.6 |
| Precinct -08100810 | 430 | 2,552 | 63 | 3,045 | 14.1% | 83.8% | R+69.7 |
| Precinct -19111911 | 735 | 2,092 | 74 | 2,901 | 25.3% | 72.1% | R+46.8 |
| Precinct -15101510 | 691 | 2,031 | 66 | 2,788 | 24.8% | 72.8% | R+48.1 |
| Precinct -29122912 | 777 | 1,916 | 53 | 2,746 | 28.3% | 69.8% | R+41.5 |
| Precinct -27122712 | 642 | 1,734 | 58 | 2,434 | 26.4% | 71.2% | R+44.9 |
| Precinct -50235023 | 420 | 1,855 | 48 | 2,323 | 18.1% | 79.9% | R+61.8 |
| Precinct -01090109 | 354 | 1,924 | 40 | 2,318 | 15.3% | 83.0% | R+67.7 |
| Precinct -46134613 | 624 | 1,594 | 56 | 2,274 | 27.4% | 70.1% | R+42.7 |
| Precinct -25112511 | 711 | 1,458 | 61 | 2,230 | 31.9% | 65.4% | R+33.5 |
| Precinct -31123112 | 799 | 1,302 | 63 | 2,164 | 36.9% | 60.2% | R+23.2 |
| Precinct -04090409 | 423 | 1,639 | 57 | 2,119 | 20.0% | 77.3% | R+57.4 |
| Precinct -39133913 | 566 | 1,480 | 71 | 2,117 | 26.7% | 69.9% | R+43.2 |
| Precinct -43134313 | 800 | 1,209 | 80 | 2,089 | 38.3% | 57.9% | R+19.6 |
| Precinct -48234823 | 416 | 1,601 | 43 | 2,060 | 20.2% | 77.7% | R+57.5 |
| Precinct -18111811 | 613 | 1,354 | 55 | 2,022 | 30.3% | 67.0% | R+36.6 |
| Precinct -28122812 | 653 | 1,205 | 47 | 1,905 | 34.3% | 63.3% | R+29.0 |
| Precinct -34123412 | 579 | 1,259 | 61 | 1,899 | 30.5% | 66.3% | R+35.8 |
| Precinct -22112211 | 666 | 1,164 | 52 | 1,882 | 35.4% | 61.8% | R+26.5 |
| Precinct -45134513 | 552 | 1,211 | 61 | 1,824 | 30.3% | 66.4% | R+36.1 |
| Precinct -07100710 | 257 | 1,395 | 37 | 1,689 | 15.2% | 82.6% | R+67.4 |
| Precinct -21112111 | 682 | 924 | 49 | 1,655 | 41.2% | 55.8% | R+14.6 |
| Precinct -37133713 | 405 | 1,163 | 62 | 1,630 | 24.8% | 71.3% | R+46.5 |
| Precinct -42134213 | 431 | 1,019 | 44 | 1,494 | 28.8% | 68.2% | R+39.4 |
| Precinct -26112611 | 434 | 1,002 | 46 | 1,482 | 29.3% | 67.6% | R+38.3 |
| Precinct -40134013 | 568 | 867 | 45 | 1,480 | 38.4% | 58.6% | R+20.2 |
| Precinct -30123012 | 300 | 1,124 | 29 | 1,453 | 20.6% | 77.4% | R+56.7 |
| Precinct -41134113 | 581 | 724 | 45 | 1,350 | 43.0% | 53.6% | R+10.6 |
| Precinct -36133613 | 279 | 975 | 43 | 1,297 | 21.5% | 75.2% | R+53.7 |
| Precinct -49234923 | 208 | 968 | 19 | 1,195 | 17.4% | 81.0% | R+63.6 |
| Precinct -51235123 | 138 | 1,024 | 25 | 1,187 | 11.6% | 86.3% | R+74.6 |
| Precinct -02090209 | 175 | 937 | 31 | 1,143 | 15.3% | 82.0% | R+66.7 |
| Precinct -24112411 | 384 | 668 | 34 | 1,086 | 35.4% | 61.5% | R+26.2 |
| Precinct -20112011 | 349 | 666 | 33 | 1,048 | 33.3% | 63.5% | R+30.2 |
| Precinct -06090609 | 174 | 753 | 23 | 950 | 18.3% | 79.3% | R+60.9 |
| Precinct -05090509 | 158 | 705 | 16 | 879 | 18.0% | 80.2% | R+62.2 |
| Precinct -03090309 | 117 | 706 | 22 | 845 | 13.8% | 83.6% | R+69.7 |
| Precinct -14101410 | 126 | 521 | 10 | 657 | 19.2% | 79.3% | R+60.1 |
| Precinct -16101610 | 172 | 397 | 21 | 590 | 29.2% | 67.3% | R+38.1 |
| Precinct -47234723 | 75 | 296 | 8 | 379 | 19.8% | 78.1% | R+58.3 |
| Precinct -13101310 | 38 | 143 | 8 | 189 | 20.1% | 75.7% | R+55.6 |
| Precinct -11101110 | 15 | 79 | 2 | 96 | 15.6% | 82.3% | R+66.7 |
Presidential margin, 1896–2024
Democratic minus Republican, by election
| Year | Margin (D minus R) |
|---|---|
| 1896 | +58.2% |
| 1900 | −1.3% |
| 1904 | −45.0% |
| 1908 | −16.7% |
| 1912 | +7.1% |
| 1916 | +10.1% |
| 1920 | −25.1% |
| 1924 | −28.7% |
| 1928 | −53.1% |
| 1932 | +14.4% |
| 1936 | +23.2% |
| 1940 | −0.8% |
| 1944 | −11.4% |
| 1948 | −9.8% |
| 1952 | −42.9% |
| 1956 | −34.5% |
| 1960 | −24.2% |
| 1964 | −11.9% |
| 1968 | −38.8% |
| 1972 | −47.5% |
| 1976 | −28.4% |
| 1980 | −42.2% |
| 1984 | −52.4% |
| 1988 | −34.6% |
| 1992 | −26.8% |
| 1996 | −30.2% |
| 2000 | −46.4% |
| 2004 | −50.6% |
| 2008 | −35.2% |
| 2012 | −37.1% |
| 2016 | −41.7% |
| 2020 | −39.7% |
| 2024 | −46.6% |
U.S. Senate
| Year | Won | Democratic | Republican | Total |
|---|---|---|---|---|
| 2022 | R | 22.3%25,922 | 62.8%73,116 | 116,458 |
| 2020 | R | 29.7%26,603 | 65.9%59,060 | 89,597 |
Registered voters
By party of registration, over time
Registration and the presidential vote track closely here — within 2.7 points.
| Year | Total registered | Democratic | Republican | Unaffiliated | Other |
|---|---|---|---|---|---|
| 2018 | 89,515 | 9,496 | 46,289 | 32,473 | 1,257 |
| 2020 | 109,910 | 13,558 | 60,278 | 34,331 | 1,743 |
| 2022 | 112,653 | 13,234 | 66,272 | 31,279 | 1,868 |
| 2024 | 119,889 | 13,734 | 72,830 | 31,332 | 1,993 |
Who moves in and out
Net migration over time, and who arrivals are — where they came from and what those places vote
+5,684 net domestic migration · 2025
Net +56,398 over 2011–2025 · gain loss
Arrivals reported $65,942 in average income, against $73,453 for residents who stayed — 10% lower. (IRS SOI, 2022–23)
The places arrivals came from lean R+11.5 on average — 35 points more Democratic-leaning than Canyon County, ID itself (R+46.6).
Where arrivals came from lean of each source
- Ada County, ID3,601R+10.3
- Owyhee County, ID188R+67.6
- Payette County, ID152R+62.9
- Malheur County, OR149R+44.1
- Los Angeles County, CA132D+32.9
- Riverside County, CA122R+1.3
Where departures went households, 2022–23
- Ada County, ID2,868
- Owyhee County, ID187
- Payette County, ID168
- Gem County, ID130
- Malheur County, OR107
- Maricopa County, AZ85
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 | +101 |
| 2012 | +630 |
| 2013 | +3,124 |
| 2014 | +2,092 |
| 2015 | +2,549 |
| 2016 | +2,714 |
| 2017 | +3,862 |
| 2018 | +4,966 |
| 2019 | +5,132 |
| 2021 | +10,033 |
| 2022 | +5,551 |
| 2023 | +4,662 |
| 2024 | +5,298 |
| 2025 | +5,684 |
Canyon County's Treasure Valley growth has made it one of Idaho's most populous counties, yet rapid in-migration has barely dented a presidential margin that exceeded 46 points in 2024, signaling strong partisan self-sorting among arrivals.
Across the recorded series it reached a Democratic high of 58.2 points in 1896 and a Republican high of 53.1 points in 1928. Between 2020 and 2024 the county moved 6.9 points toward the Republican candidate; the 2024 margin was 46.6 points.
A population of 250,790, a 67% non-Hispanic-white share, and a median household income of $76,488 describe the county. The county's voting pattern over the last decade is most similar to that of Twin Falls County and Elko County.
The counties whose fingerprint — 2000–2024 trajectory, demographics, ancestry, religion — sits closest to this one, and why.
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 →
Canyon County, Idaho. Akashic. https://akashic.app/county/16027/. Accessed May 20, 2026. License: CC BY 4.0.