Madison County, Idaho
Precinct data
Results by precinct
21 precincts · 17,363 votes
Precinct boundaries and identifiers are cycle-specific. This table does not join rows across years without a validated crosswalk.
| Precinct -002002 | 184 | 1,353 | 49 | 1,586 | 11.6% | 85.3% | R+73.7 |
|---|---|---|---|---|---|---|---|
| Precinct -015015 | 285 | 1,151 | 57 | 1,493 | 19.1% | 77.1% | R+58.0 |
| Precinct -003003 | 168 | 1,270 | 43 | 1,481 | 11.3% | 85.8% | R+74.4 |
| Precinct -007007 | 212 | 1,086 | 54 | 1,352 | 15.7% | 80.3% | R+64.6 |
| Precinct -006006 | 156 | 997 | 36 | 1,189 | 13.1% | 83.9% | R+70.7 |
| Precinct -008008 | 176 | 806 | 43 | 1,025 | 17.2% | 78.6% | R+61.5 |
| Precinct -009009 | 214 | 733 | 56 | 1,003 | 21.3% | 73.1% | R+51.7 |
| Precinct -016016 | 252 | 662 | 45 | 959 | 26.3% | 69.0% | R+42.8 |
| Precinct -005005 | 164 | 667 | 38 | 869 | 18.9% | 76.8% | R+57.9 |
| Precinct -014014 | 215 | 594 | 36 | 845 | 25.4% | 70.3% | R+44.9 |
| Precinct -018018 | 110 | 660 | 42 | 812 | 13.5% | 81.3% | R+67.7 |
| Precinct -019019 | 71 | 636 | 24 | 731 | 9.7% | 87.0% | R+77.3 |
| Precinct -020020 | 105 | 433 | 22 | 560 | 18.8% | 77.3% | R+58.6 |
| Precinct -004004 | 39 | 510 | 10 | 559 | 7.0% | 91.2% | R+84.3 |
| Precinct -010010 | 82 | 417 | 24 | 523 | 15.7% | 79.7% | R+64.1 |
| Precinct -011011 | 96 | 382 | 19 | 497 | 19.3% | 76.9% | R+57.5 |
| Precinct -021021 | 58 | 385 | 19 | 462 | 12.6% | 83.3% | R+70.8 |
| Precinct -012012 | 76 | 310 | 24 | 410 | 18.5% | 75.6% | R+57.1 |
| Precinct -013013 | 57 | 281 | 8 | 346 | 16.5% | 81.2% | R+64.7 |
| Precinct -017017 | 26 | 307 | 6 | 339 | 7.7% | 90.6% | R+82.9 |
| Precinct -001001 | 21 | 285 | 16 | 322 | 6.5% | 88.5% | R+82.0 |
Presidential margin, 1916–2024
Democratic minus Republican, by election
| Year | Margin (D minus R) |
|---|---|
| 1916 | +9.5% |
| 1920 | −31.6% |
| 1924 | −31.0% |
| 1928 | −15.2% |
| 1932 | +24.7% |
| 1936 | +37.3% |
| 1940 | +15.2% |
| 1944 | +11.6% |
| 1948 | +11.6% |
| 1952 | −34.3% |
| 1956 | −28.1% |
| 1960 | −17.2% |
| 1964 | −3.8% |
| 1968 | −47.1% |
| 1972 | −55.5% |
| 1976 | −49.6% |
| 1980 | −78.6% |
| 1984 | −86.3% |
| 1988 | −71.0% |
| 1992 | −49.6% |
| 1996 | −58.1% |
| 2000 | −79.4% |
| 2004 | −84.8% |
| 2008 | −72.8% |
| 2012 | −87.5% |
| 2016 | −49.3% |
| 2020 | −63.7% |
| 2024 | −64.3% |
U.S. Senate
| Year | Won | Democratic | Republican | Total |
|---|---|---|---|---|
| 2022 | R | 11.7%1,944 | 78.9%13,066 | 16,552 |
| 2020 | R | 13.5%2,288 | 79.8%13,517 | 16,941 |
Registered voters
By party of registration, over time
Registration and the presidential vote track closely here — within 1.7 points.
| Year | Total registered | Democratic | Republican | Unaffiliated | Other |
|---|---|---|---|---|---|
| 2018 | 18,401 | 561 | 13,065 | 4,511 | 264 |
| 2020 | 21,285 | 929 | 14,673 | 5,299 | 384 |
| 2022 | 20,308 | 903 | 14,197 | 4,819 | 389 |
| 2024 | 20,038 | 975 | 14,188 | 4,509 | 366 |
Who moves in and out
Net migration over time, and who arrivals are — where they came from and what those places vote
−775 net domestic migration · 2025
Net −10,177 over 2011–2025 · gain loss
Arrivals reported $39,074 in average income, against $69,647 for residents who stayed — 44% lower. (IRS SOI, 2022–23)
The places arrivals came from lean R+36.6 on average — 28 points more Democratic-leaning than Madison County, ID itself (R+64.3).
Where arrivals came from lean of each source
- Bonneville County, ID218R+45.4
- Utah County, UT138R+39.8
- Jefferson County, ID136R+73.3
- Fremont County, ID112R+69.0
- Maricopa County, AZ97R+3.5
- Salt Lake County, UT71D+10.2
Where departures went households, 2022–23
- Bonneville County, ID343
- Utah County, UT265
- Jefferson County, ID155
- Salt Lake County, UT145
- Ada County, ID92
- Fremont County, ID89
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 | −606 |
| 2012 | −1,190 |
| 2013 | −1,130 |
| 2014 | −601 |
| 2015 | −1,058 |
| 2016 | −77 |
| 2017 | −630 |
| 2018 | −1,077 |
| 2019 | −305 |
| 2021 | +249 |
| 2022 | −151 |
| 2023 | −1,727 |
| 2024 | −1,099 |
| 2025 | −775 |
Madison County's dominant Latter-day Saint population and university town of Rexburg produce presidential margins that routinely rank among the highest in Idaho, with the 2024 result of R+64.8 reflecting deep, consistent partisan alignment.
Across the recorded series it reached a Democratic high of 37.3 points in 1936 and a Republican high of 87.5 points in 2012. Between 2020 and 2024 the county moved 0.6 points toward the Republican candidate; the 2024 margin was 64.3 points.
A population of 54,618, a 84% non-Hispanic-white share, and a median household income of $60,160 describe the county. The county's voting pattern over the last decade is most similar to that of Iron County and Bonneville 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 →
Madison County, Idaho. Akashic. https://akashic.app/county/16065/. Accessed May 20, 2026. License: CC BY 4.0.