Siskiyou County, California
Precinct data
Results by precinct
54 precincts · 21,489 votes
Precinct boundaries and identifiers are cycle-specific. This table does not join rows across years without a validated crosswalk.
| Precinct -P3112P3112 | 404 | 427 | 34 | 865 | 46.7% | 49.4% | R+2.7 |
|---|---|---|---|---|---|---|---|
| Precinct -P3007P3007 | 402 | 420 | 30 | 852 | 47.2% | 49.3% | R+2.1 |
| Precinct -P5000P5000 | 208 | 530 | 15 | 753 | 27.6% | 70.4% | R+42.8 |
| Precinct -P5005P5005 | 195 | 517 | 27 | 739 | 26.4% | 70.0% | R+43.6 |
| Precinct -P2100P2100 | 421 | 264 | 41 | 726 | 58.0% | 36.4% | D+21.6 |
| Precinct -P2014P2014 | 386 | 305 | 17 | 708 | 54.5% | 43.1% | D+11.4 |
| Precinct -M1021M1021 | 244 | 425 | 28 | 697 | 35.0% | 61.0% | R+26.0 |
| Precinct -M4028M4028 | 157 | 522 | 18 | 697 | 22.5% | 74.9% | R+52.4 |
| Precinct -P2111P2111 | 392 | 263 | 30 | 685 | 57.2% | 38.4% | D+18.8 |
| Precinct -P2019P2019 | 320 | 328 | 26 | 674 | 47.5% | 48.7% | R+1.2 |
| Precinct -P4118P4118 | 239 | 381 | 28 | 648 | 36.9% | 58.8% | R+21.9 |
| Precinct -P3014P3014 | 304 | 309 | 28 | 641 | 47.4% | 48.2% | R+0.8 |
| Precinct -P1110P1110 | 170 | 438 | 8 | 616 | 27.6% | 71.1% | R+43.5 |
| Precinct -P2110P2110 | 337 | 230 | 34 | 601 | 56.1% | 38.3% | D+17.8 |
| Precinct -P4115P4115 | 193 | 373 | 20 | 586 | 32.9% | 63.7% | R+30.7 |
| Precinct -P2115P2115 | 345 | 207 | 26 | 578 | 59.7% | 35.8% | D+23.9 |
| Precinct -P4110P4110 | 237 | 320 | 19 | 576 | 41.1% | 55.6% | R+14.4 |
| Precinct -P4112P4112 | 188 | 356 | 15 | 559 | 33.6% | 63.7% | R+30.1 |
| Precinct -P4121P4121 | 165 | 349 | 11 | 525 | 31.4% | 66.5% | R+35.0 |
| Precinct -P3006P3006 | 249 | 248 | 20 | 517 | 48.2% | 48.0% | D+0.2 |
| Precinct -P5008P5008 | 135 | 349 | 11 | 495 | 27.3% | 70.5% | R+43.2 |
| Precinct -P2015P2015 | 277 | 197 | 17 | 491 | 56.4% | 40.1% | D+16.3 |
| Precinct -P1003P1003 | 127 | 280 | 17 | 424 | 30.0% | 66.0% | R+36.1 |
| Precinct -M3000M3000 | 94 | 294 | 7 | 395 | 23.8% | 74.4% | R+50.6 |
| Precinct -P4116P4116 | 161 | 225 | 8 | 394 | 40.9% | 57.1% | R+16.2 |
| Precinct -P3021P3021 | 188 | 180 | 16 | 384 | 49.0% | 46.9% | D+2.1 |
| Precinct -P5011P5011 | 131 | 241 | 7 | 379 | 34.6% | 63.6% | R+29.0 |
| Precinct -P5103P5103 | 118 | 215 | 6 | 339 | 34.8% | 63.4% | R+28.6 |
| Precinct -P1026P1026 | 119 | 179 | 11 | 309 | 38.5% | 57.9% | R+19.4 |
| Precinct -P5107P5107 | 99 | 191 | 12 | 302 | 32.8% | 63.2% | R+30.5 |
| Precinct -M1009M1009 | 54 | 215 | 9 | 278 | 19.4% | 77.3% | R+57.9 |
| Precinct -P1105P1105 | 69 | 172 | 5 | 246 | 28.0% | 69.9% | R+41.9 |
| Precinct -P2009P2009 | 100 | 137 | 4 | 241 | 41.5% | 56.8% | R+15.4 |
| Precinct -M5012M5012 | 61 | 164 | 3 | 228 | 26.8% | 71.9% | R+45.2 |
| Precinct -P3009P3009 | 83 | 143 | 2 | 228 | 36.4% | 62.7% | R+26.3 |
| Precinct -P1002P1002 | 42 | 174 | 8 | 224 | 18.8% | 77.7% | R+58.9 |
| Precinct -M3013M3013 | 72 | 148 | 2 | 222 | 32.4% | 66.7% | R+34.2 |
| Precinct -M5080M5080 | 55 | 145 | 5 | 205 | 26.8% | 70.7% | R+43.9 |
| Precinct -M1023M1023 | 36 | 154 | 4 | 194 | 18.6% | 79.4% | R+60.8 |
| Precinct -M1001M1001 | 52 | 138 | 1 | 191 | 27.2% | 72.3% | R+45.0 |
| Precinct -M5018M5018 | 78 | 101 | 8 | 187 | 41.7% | 54.0% | R+12.3 |
| Precinct -M1024M1024 | 23 | 159 | 4 | 186 | 12.4% | 85.5% | R+73.1 |
| Precinct -P3001P3001 | 80 | 98 | 7 | 185 | 43.2% | 53.0% | R+9.7 |
| Precinct -M1015M1015 | 72 | 96 | 9 | 177 | 40.7% | 54.2% | R+13.6 |
| Precinct -M1004M1004 | 38 | 135 | 3 | 176 | 21.6% | 76.7% | R+55.1 |
| Precinct -M5002M5002 | 75 | 89 | 7 | 171 | 43.9% | 52.0% | R+8.2 |
| Precinct -M1010M1010 | 40 | 119 | 7 | 166 | 24.1% | 71.7% | R+47.6 |
| Precinct -M5050M5050 | 34 | 117 | 6 | 157 | 21.7% | 74.5% | R+52.9 |
| Precinct -M3002M3002 | 37 | 114 | 5 | 156 | 23.7% | 73.1% | R+49.4 |
| Precinct -M1117M1117 | 50 | 85 | 4 | 139 | 36.0% | 61.2% | R+25.2 |
| Precinct -M5013M5013 | 59 | 76 | 3 | 138 | 42.8% | 55.1% | R+12.3 |
| Precinct -M5009M5009 | 30 | 84 | 0 | 114 | 26.3% | 73.7% | R+47.4 |
| Precinct -M2002M2002 | 50 | 12 | 1 | 63 | 79.4% | 19.0% | D+60.3 |
| Precinct -M2001M2001 | 34 | 23 | 5 | 62 | 54.8% | 37.1% | D+17.7 |
Presidential margin, 1876–2024
Democratic minus Republican, by election
| Year | Margin (D minus R) |
|---|---|
| 1876 | +9.1% |
| 1880 | +5.8% |
| 1884 | +7.7% |
| 1888 | +3.4% |
| 1892 | +3.5% |
| 1896 | +7.7% |
| 1900 | −6.3% |
| 1904 | −25.1% |
| 1908 | −4.1% |
| 1912 | +49.6% |
| 1916 | +23.0% |
| 1920 | −29.0% |
| 1924 | −30.9% |
| 1928 | −12.4% |
| 1932 | +42.6% |
| 1936 | +39.8% |
| 1940 | +27.2% |
| 1944 | +15.1% |
| 1948 | +11.5% |
| 1952 | −12.6% |
| 1956 | −0.0% |
| 1960 | +13.4% |
| 1964 | +27.5% |
| 1968 | −0.5% |
| 1972 | −7.7% |
| 1976 | −0.1% |
| 1980 | −21.9% |
| 1984 | −18.9% |
| 1988 | −3.9% |
| 1992 | +7.7% |
| 1996 | −8.9% |
| 2000 | −29.6% |
| 2004 | −22.9% |
| 2008 | −10.3% |
| 2012 | −15.2% |
| 2016 | −20.0% |
| 2020 | −15.8% |
| 2024 | −19.2% |
U.S. Senate
Registered voters
By party of registration, over time
Registration leans Republican; the presidential vote runs 4.4 points more Democratic.
27,963 registered voters · 2024 · down from 29,020 in 2022
Who moves in and out
Net migration over time, and who arrivals are — where they came from and what those places vote
−217 net domestic migration · 2025
Net −1,215 over 2011–2025 · gain loss
Arrivals reported $62,694 in average income, against $65,215 for residents who stayed — 4% lower. (IRS SOI, 2022–23)
The places arrivals came from lean R+3.9 on average — 15 points more Democratic-leaning than Siskiyou County, CA itself (R+19.2).
Where arrivals came from lean of each source
- Shasta County, CA73R+36.5
- Sacramento County, CA46D+19.7
- Jackson County, OR32R+6.4
- Klamath County, OR31R+41.7
- Contra Costa County, CA24D+37.9
- Los Angeles County, CA24D+32.9
Where departures went households, 2022–23
- Shasta County, CA98
- Jackson County, OR92
- Klamath County, OR54
- Sacramento County, CA41
- Butte County, CA23
- Humboldt County, CA22
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 | −257 |
| 2012 | −525 |
| 2013 | −432 |
| 2014 | −152 |
| 2015 | +50 |
| 2016 | +264 |
| 2017 | +416 |
| 2018 | +35 |
| 2019 | +133 |
| 2021 | +322 |
| 2022 | −81 |
| 2023 | −582 |
| 2024 | −189 |
| 2025 | −217 |
Siskiyou spans more than 6,000 square miles of mountains and high desert along the Oregon border, with a small, rural population that has backed Republican presidential candidates by double digits in each of the last several cycles.
Across the recorded series it reached a Democratic high of 49.6 points in 1912 and a Republican high of 30.9 points in 1924. Between 2020 and 2024 the county moved 3.5 points toward the Republican candidate; the 2024 margin was 19.2 points.
A population of 43,466, a 73% non-Hispanic-white share, and a median household income of $59,095 describe the county. The county's voting pattern over the last decade is most similar to that of Plumas County and Mariposa 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 →
Siskiyou County, California. Akashic. https://akashic.app/county/06093/. Accessed May 20, 2026. License: CC BY 4.0.