Jerome County, Idaho
Precinct data
Results by precinct
12 precincts · 7,894 votes
Precinct boundaries and identifiers are cycle-specific. This table does not join rows across years without a validated crosswalk.
| Precinct -009009 | 257 | 688 | 13 | 958 | 26.8% | 71.8% | R+45.0 |
|---|---|---|---|---|---|---|---|
| Precinct -002002 | 127 | 777 | 14 | 918 | 13.8% | 84.6% | R+70.8 |
| Precinct -012012 | 146 | 673 | 9 | 828 | 17.6% | 81.3% | R+63.6 |
| Precinct -001001 | 174 | 572 | 17 | 763 | 22.8% | 75.0% | R+52.2 |
| Precinct -007007 | 224 | 522 | 16 | 762 | 29.4% | 68.5% | R+39.1 |
| Precinct -003003 | 164 | 536 | 13 | 713 | 23.0% | 75.2% | R+52.2 |
| Precinct -011011 | 125 | 497 | 11 | 633 | 19.7% | 78.5% | R+58.8 |
| Precinct -008008 | 182 | 427 | 17 | 626 | 29.1% | 68.2% | R+39.1 |
| Precinct -006006 | 92 | 447 | 12 | 551 | 16.7% | 81.1% | R+64.4 |
| Precinct -010010 | 125 | 333 | 7 | 465 | 26.9% | 71.6% | R+44.7 |
| Precinct -005005 | 63 | 351 | 7 | 421 | 15.0% | 83.4% | R+68.4 |
| Precinct -004004 | 63 | 189 | 4 | 256 | 24.6% | 73.8% | R+49.2 |
Presidential margin, 1920–2024
Democratic minus Republican, by election
| Year | Margin (D minus R) |
|---|---|
| 1920 | −37.8% |
| 1924 | −31.0% |
| 1928 | −45.6% |
| 1932 | +22.5% |
| 1936 | +28.5% |
| 1940 | −14.5% |
| 1944 | −10.7% |
| 1948 | −0.1% |
| 1952 | −48.5% |
| 1956 | −29.4% |
| 1960 | −17.0% |
| 1964 | −26.0% |
| 1968 | −39.3% |
| 1972 | −56.9% |
| 1976 | −26.9% |
| 1980 | −54.2% |
| 1984 | −58.0% |
| 1988 | −31.0% |
| 1992 | −18.3% |
| 1996 | −27.4% |
| 2000 | −50.9% |
| 2004 | −58.3% |
| 2008 | −45.3% |
| 2012 | −46.5% |
| 2016 | −49.1% |
| 2020 | −49.2% |
| 2024 | −53.7% |
U.S. Senate
| Year | Won | Democratic | Republican | Total |
|---|---|---|---|---|
| 2022 | R | 16.5%1,606 | 72.1%7,012 | 9,730 |
| 2020 | R | 25.4%1,978 | 70.0%5,450 | 7,788 |
Registered voters
By party of registration, over time
Registration and the presidential vote track closely here — within 1.0 points.
| Year | Total registered | Democratic | Republican | Unaffiliated | Other |
|---|---|---|---|---|---|
| 2018 | 8,042 | 679 | 4,457 | 2,743 | 163 |
| 2020 | 9,331 | 995 | 5,456 | 2,718 | 162 |
| 2022 | 8,998 | 899 | 5,484 | 2,479 | 136 |
| 2024 | 9,371 | 886 | 6,019 | 2,323 | 143 |
Who moves in and out
Net migration over time, and who arrivals are — where they came from and what those places vote
−106 net domestic migration · 2025
Net −412 over 2011–2025 · gain loss
Arrivals reported $55,797 in average income, against $68,482 for residents who stayed — 19% lower. (IRS SOI, 2022–23)
The places arrivals came from lean R+49.6 on average — 4.2 points more Democratic-leaning than Jerome County, ID itself (R+53.7).
Where arrivals came from lean of each source
- Twin Falls County, ID276R+48.8
- Gooding County, ID77R+60.4
- Ada County, ID27R+10.3
- Minidoka County, ID23R+63.3
- Lincoln County, ID20R+56.0
Where departures went households, 2022–23
- Twin Falls County, ID339
- Gooding County, ID53
- Ada County, ID35
- Canyon County, ID22
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 | −192 |
| 2012 | −292 |
| 2013 | −188 |
| 2014 | −69 |
| 2015 | −242 |
| 2016 | +56 |
| 2017 | +41 |
| 2018 | −26 |
| 2019 | +41 |
| 2021 | +258 |
| 2022 | +259 |
| 2023 | −3 |
| 2024 | +51 |
| 2025 | −106 |
Jerome County sits in the Snake River Plain's intensive agricultural corridor, where a substantial Latino workforce tied to the dairy and food-processing industries creates a demographic tension with its lopsided Republican presidential margins.
Across the recorded series it reached a Democratic high of 28.5 points in 1936 and a Republican high of 58.3 points in 2004. Between 2020 and 2024 the county moved 4.6 points toward the Republican candidate; the 2024 margin was 53.7 points.
A population of 25,173, a 57% non-Hispanic-white share, and a median household income of $71,724 describe the county. The county's voting pattern over the last decade is most similar to that of Minidoka County and Malheur 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 →
Jerome County, Idaho. Akashic. https://akashic.app/county/16053/. Accessed May 20, 2026. License: CC BY 4.0.