Twin Falls County, Idaho
Precinct data
Results by precinct
44 precincts · 37,383 votes
Precinct boundaries and identifiers are cycle-specific. This table does not join rows across years without a validated crosswalk.
| Precinct -TF25TF25 | 3,289 | 6,757 | 253 | 10,299 | 31.9% | 65.6% | R+33.7 |
|---|---|---|---|---|---|---|---|
| Precinct -TF24TF24 | 1,737 | 5,902 | 157 | 7,796 | 22.3% | 75.7% | R+53.4 |
| Precinct -K1K1 | 89 | 586 | 31 | 706 | 12.6% | 83.0% | R+70.4 |
| Precinct -K3K3 | 118 | 548 | 17 | 683 | 17.3% | 80.2% | R+63.0 |
| Precinct -TF20TF20 | 136 | 507 | 29 | 672 | 20.2% | 75.4% | R+55.2 |
| Precinct -TF14TF14 | 189 | 460 | 20 | 669 | 28.3% | 68.8% | R+40.5 |
| Precinct -F1F1 | 89 | 508 | 12 | 609 | 14.6% | 83.4% | R+68.8 |
| Precinct -HAHA | 123 | 457 | 18 | 598 | 20.6% | 76.4% | R+55.9 |
| Precinct -TF19TF19 | 153 | 426 | 14 | 593 | 25.8% | 71.8% | R+46.0 |
| Precinct -B2B2 | 67 | 513 | 12 | 592 | 11.3% | 86.7% | R+75.3 |
| Precinct -K2K2 | 67 | 496 | 26 | 589 | 11.4% | 84.2% | R+72.8 |
| Precinct -TF13TF13 | 145 | 409 | 13 | 567 | 25.6% | 72.1% | R+46.6 |
| Precinct -TF09TF09 | 149 | 370 | 19 | 538 | 27.7% | 68.8% | R+41.1 |
| Precinct -F3F3 | 69 | 450 | 14 | 533 | 12.9% | 84.4% | R+71.5 |
| Precinct -F2F2 | 71 | 440 | 7 | 518 | 13.7% | 84.9% | R+71.2 |
| Precinct -TF10TF10 | 133 | 365 | 20 | 518 | 25.7% | 70.5% | R+44.8 |
| Precinct -K4K4 | 70 | 434 | 9 | 513 | 13.6% | 84.6% | R+71.0 |
| Precinct -TF08TF08 | 133 | 373 | 4 | 510 | 26.1% | 73.1% | R+47.1 |
| Precinct -TF17TF17 | 147 | 345 | 14 | 506 | 29.1% | 68.2% | R+39.1 |
| Precinct -TF18TF18 | 120 | 362 | 12 | 494 | 24.3% | 73.3% | R+49.0 |
| Precinct -TF11TF11 | 126 | 344 | 18 | 488 | 25.8% | 70.5% | R+44.7 |
| Precinct -TF05TF05 | 108 | 350 | 17 | 475 | 22.7% | 73.7% | R+50.9 |
| Precinct -TF07TF07 | 133 | 323 | 14 | 470 | 28.3% | 68.7% | R+40.4 |
| Precinct -B5B5 | 100 | 334 | 17 | 451 | 22.2% | 74.1% | R+51.9 |
| Precinct -B3B3 | 76 | 353 | 13 | 442 | 17.2% | 79.9% | R+62.7 |
| Precinct -TF06TF06 | 95 | 318 | 24 | 437 | 21.7% | 72.8% | R+51.0 |
| Precinct -TF04TF04 | 114 | 291 | 25 | 430 | 26.5% | 67.7% | R+41.2 |
| Precinct -TF03TF03 | 140 | 254 | 19 | 413 | 33.9% | 61.5% | R+27.6 |
| Precinct -TF16TF16 | 73 | 314 | 15 | 402 | 18.2% | 78.1% | R+60.0 |
| Precinct -B4B4 | 70 | 312 | 16 | 398 | 17.6% | 78.4% | R+60.8 |
| Precinct -B1B1 | 54 | 330 | 12 | 396 | 13.6% | 83.3% | R+69.7 |
| Precinct -TF26TF26 | 78 | 311 | 6 | 395 | 19.7% | 78.7% | R+59.0 |
| Precinct -TF01TF01 | 128 | 243 | 15 | 386 | 33.2% | 63.0% | R+29.8 |
| Precinct -HOHO | 51 | 310 | 9 | 370 | 13.8% | 83.8% | R+70.0 |
| Precinct -CACA | 33 | 327 | 7 | 367 | 9.0% | 89.1% | R+80.1 |
| Precinct -TF12TF12 | 99 | 241 | 16 | 356 | 27.8% | 67.7% | R+39.9 |
| Precinct -TF02TF02 | 111 | 227 | 15 | 353 | 31.4% | 64.3% | R+32.9 |
| Precinct -TF21TF21 | 113 | 211 | 10 | 334 | 33.8% | 63.2% | R+29.3 |
| Precinct -DCDC | 52 | 264 | 8 | 324 | 16.0% | 81.5% | R+65.4 |
| Precinct -TF22TF22 | 81 | 228 | 10 | 319 | 25.4% | 71.5% | R+46.1 |
| Precinct -MUMU | 42 | 227 | 5 | 274 | 15.3% | 82.8% | R+67.5 |
| Precinct -TF15TF15 | 48 | 182 | 11 | 241 | 19.9% | 75.5% | R+55.6 |
| Precinct -MAMA | 23 | 203 | 6 | 232 | 9.9% | 87.5% | R+77.6 |
| Precinct -TF23TF23 | 22 | 99 | 6 | 127 | 17.3% | 78.0% | R+60.6 |
Presidential margin, 1908–2024
Democratic minus Republican, by election
| Year | Margin (D minus R) |
|---|---|
| 1908 | −22.3% |
| 1912 | +12.5% |
| 1916 | +11.6% |
| 1920 | −34.3% |
| 1924 | −33.0% |
| 1928 | −46.3% |
| 1932 | +12.5% |
| 1936 | +19.6% |
| 1940 | −10.7% |
| 1944 | −12.9% |
| 1948 | −12.9% |
| 1952 | −52.2% |
| 1956 | −36.2% |
| 1960 | −24.3% |
| 1964 | −20.3% |
| 1968 | −41.2% |
| 1972 | −55.1% |
| 1976 | −34.2% |
| 1980 | −53.1% |
| 1984 | −57.0% |
| 1988 | −29.7% |
| 1992 | −15.9% |
| 1996 | −24.3% |
| 2000 | −44.5% |
| 2004 | −50.0% |
| 2008 | −36.7% |
| 2012 | −43.5% |
| 2016 | −45.5% |
| 2020 | −45.2% |
| 2024 | −48.8% |
U.S. Senate
| Year | Won | Democratic | Republican | Total |
|---|---|---|---|---|
| 2022 | R | 20.9%9,560 | 65.2%29,828 | 45,726 |
| 2020 | R | 27.1%9,776 | 67.6%24,355 | 36,040 |
Registered voters
By party of registration, over time
Registration leans Republican; the presidential vote runs 5.1 points more Republican.
| Year | Total registered | Democratic | Republican | Unaffiliated | Other |
|---|---|---|---|---|---|
| 2018 | 35,269 | 3,019 | 19,841 | 12,015 | 394 |
| 2020 | 42,088 | 4,479 | 24,145 | 12,899 | 565 |
| 2022 | 41,663 | 4,088 | 25,688 | 11,289 | 598 |
| 2024 | 44,125 | 4,247 | 28,006 | 11,262 | 610 |
Who moves in and out
Net migration over time, and who arrivals are — where they came from and what those places vote
+689 net domestic migration · 2025
Net +8,543 over 2011–2025 · gain loss
Arrivals reported $55,555 in average income, against $73,154 for residents who stayed — 24% lower. (IRS SOI, 2022–23)
The places arrivals came from lean R+35.5 on average — 13 points more Democratic-leaning than Twin Falls County, ID itself (R+48.8).
Where arrivals came from lean of each source
- Jerome County, ID339R+53.7
- Ada County, ID195R+10.3
- Gooding County, ID138R+60.4
- Cassia County, ID98R+69.1
- Canyon County, ID68R+46.6
- Minidoka County, ID67R+63.3
Where departures went households, 2022–23
- Ada County, ID284
- Jerome County, ID276
- Gooding County, ID95
- Canyon County, ID87
- Cassia County, ID65
- Bannock County, ID54
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 | −128 |
| 2012 | −281 |
| 2013 | +639 |
| 2014 | +463 |
| 2015 | +530 |
| 2016 | +802 |
| 2017 | +870 |
| 2018 | +161 |
| 2019 | +369 |
| 2021 | +1,923 |
| 2022 | +1,214 |
| 2023 | +895 |
| 2024 | +397 |
| 2025 | +689 |
Twin Falls County sits in the Snake River Plain and has voted Republican by margins exceeding 40 points in recent cycles, with its mid-sized urban core not meaningfully softening that partisan lean.
Across the recorded series it reached a Democratic high of 19.6 points in 1936 and a Republican high of 57.0 points in 1984. Between 2020 and 2024 the county moved 3.6 points toward the Republican candidate; the 2024 margin was 48.8 points.
A population of 93,734, a 75% non-Hispanic-white share, and a median household income of $67,409 describe the county. The county's voting pattern over the last decade is most similar to that of Bingham County and Canyon 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 →
Twin Falls County, Idaho. Akashic. https://akashic.app/county/16083/. Accessed May 20, 2026. License: CC BY 4.0.