San Luis Obispo County, California
Precinct data
Results by precinct
136 precincts · 149,580 votes
Precinct boundaries and identifiers are cycle-specific. This table does not join rows across years without a validated crosswalk.
| Precinct -202202 | 2,125 | 1,206 | 98 | 3,429 | 62.0% | 35.2% | D+26.8 |
|---|---|---|---|---|---|---|---|
| Precinct -113113 | 907 | 1,660 | 82 | 2,649 | 34.2% | 62.7% | R+28.4 |
| Precinct -215215 | 1,948 | 588 | 95 | 2,631 | 74.0% | 22.3% | D+51.7 |
| Precinct -307307 | 1,221 | 948 | 57 | 2,226 | 54.9% | 42.6% | D+12.3 |
| Precinct -422422 | 1,367 | 781 | 33 | 2,181 | 62.7% | 35.8% | D+26.9 |
| Precinct -111111 | 655 | 1,431 | 50 | 2,136 | 30.7% | 67.0% | R+36.3 |
| Precinct -206206 | 1,472 | 564 | 85 | 2,121 | 69.4% | 26.6% | D+42.8 |
| Precinct -402402 | 1,126 | 869 | 68 | 2,063 | 54.6% | 42.1% | D+12.5 |
| Precinct -312312 | 1,515 | 458 | 84 | 2,057 | 73.7% | 22.3% | D+51.4 |
| Precinct -204204 | 1,303 | 661 | 66 | 2,030 | 64.2% | 32.6% | D+31.6 |
| Precinct -105105 | 920 | 1,023 | 53 | 1,996 | 46.1% | 51.3% | R+5.2 |
| Precinct -109109 | 934 | 991 | 42 | 1,967 | 47.5% | 50.4% | R+2.9 |
| Precinct -323323 | 938 | 950 | 69 | 1,957 | 47.9% | 48.5% | R+0.6 |
| Precinct -321321 | 1,382 | 494 | 75 | 1,951 | 70.8% | 25.3% | D+45.5 |
| Precinct -207207 | 1,367 | 496 | 74 | 1,937 | 70.6% | 25.6% | D+45.0 |
| Precinct -502502 | 966 | 901 | 50 | 1,917 | 50.4% | 47.0% | D+3.4 |
| Precinct -301301 | 897 | 799 | 63 | 1,759 | 51.0% | 45.4% | D+5.6 |
| Precinct -106106 | 796 | 917 | 38 | 1,751 | 45.5% | 52.4% | R+6.9 |
| Precinct -119119 | 743 | 926 | 57 | 1,726 | 43.0% | 53.7% | R+10.6 |
| Precinct -313313 | 1,259 | 413 | 51 | 1,723 | 73.1% | 24.0% | D+49.1 |
| Precinct -507507 | 802 | 852 | 57 | 1,711 | 46.9% | 49.8% | R+2.9 |
| Precinct -101101 | 828 | 818 | 42 | 1,688 | 49.1% | 48.5% | D+0.6 |
| Precinct -120120 | 743 | 858 | 31 | 1,632 | 45.5% | 52.6% | R+7.0 |
| Precinct -205205 | 1,127 | 443 | 60 | 1,630 | 69.1% | 27.2% | D+42.0 |
| Precinct -506506 | 728 | 838 | 43 | 1,609 | 45.2% | 52.1% | R+6.8 |
| Precinct -320320 | 1,104 | 438 | 66 | 1,608 | 68.7% | 27.2% | D+41.4 |
| Precinct -520520 | 732 | 819 | 46 | 1,597 | 45.8% | 51.3% | R+5.4 |
| Precinct -308308 | 783 | 754 | 55 | 1,592 | 49.2% | 47.4% | D+1.8 |
| Precinct -214214 | 1,095 | 458 | 34 | 1,587 | 69.0% | 28.9% | D+40.1 |
| Precinct -423423 | 641 | 900 | 34 | 1,575 | 40.7% | 57.1% | R+16.4 |
| Precinct -519519 | 510 | 1,002 | 40 | 1,552 | 32.9% | 64.6% | R+31.7 |
| Precinct -108108 | 714 | 798 | 33 | 1,545 | 46.2% | 51.7% | R+5.4 |
| Precinct -503503 | 714 | 783 | 46 | 1,543 | 46.3% | 50.7% | R+4.5 |
| Precinct -406406 | 828 | 663 | 42 | 1,533 | 54.0% | 43.2% | D+10.8 |
| Precinct -411411 | 843 | 639 | 49 | 1,531 | 55.1% | 41.7% | D+13.3 |
| Precinct -102102 | 746 | 724 | 47 | 1,517 | 49.2% | 47.7% | D+1.5 |
| Precinct -309309 | 783 | 687 | 39 | 1,509 | 51.9% | 45.5% | D+6.4 |
| Precinct -103103 | 631 | 832 | 42 | 1,505 | 41.9% | 55.3% | R+13.4 |
| Precinct -504504 | 691 | 766 | 44 | 1,501 | 46.0% | 51.0% | R+5.0 |
| Precinct -310310 | 1,055 | 394 | 50 | 1,499 | 70.4% | 26.3% | D+44.1 |
| Precinct -514514 | 474 | 978 | 36 | 1,488 | 31.9% | 65.7% | R+33.9 |
| Precinct -424424 | 690 | 749 | 39 | 1,478 | 46.7% | 50.7% | R+4.0 |
| Precinct -505505 | 766 | 674 | 38 | 1,478 | 51.8% | 45.6% | D+6.2 |
| Precinct -217217 | 962 | 459 | 46 | 1,467 | 65.6% | 31.3% | D+34.3 |
| Precinct -511511 | 813 | 593 | 49 | 1,455 | 55.9% | 40.8% | D+15.1 |
| Precinct -117117 | 436 | 964 | 32 | 1,432 | 30.4% | 67.3% | R+36.9 |
| Precinct -510510 | 720 | 643 | 61 | 1,424 | 50.6% | 45.2% | D+5.4 |
| Precinct -316316 | 1,101 | 263 | 51 | 1,415 | 77.8% | 18.6% | D+59.2 |
| Precinct -314314 | 1,099 | 251 | 56 | 1,406 | 78.2% | 17.9% | D+60.3 |
| Precinct -518518 | 1,024 | 317 | 53 | 1,394 | 73.5% | 22.7% | D+50.7 |
| Precinct -517517 | 1,017 | 332 | 44 | 1,393 | 73.0% | 23.8% | D+49.2 |
| Precinct -203203 | 818 | 529 | 45 | 1,392 | 58.8% | 38.0% | D+20.8 |
| Precinct -418418 | 631 | 740 | 21 | 1,392 | 45.3% | 53.2% | R+7.8 |
| Precinct -426426 | 646 | 704 | 42 | 1,392 | 46.4% | 50.6% | R+4.2 |
| Precinct -509509 | 648 | 689 | 46 | 1,383 | 46.9% | 49.8% | R+3.0 |
| Precinct -409409 | 737 | 592 | 37 | 1,366 | 54.0% | 43.3% | D+10.6 |
| Precinct -318318 | 728 | 592 | 43 | 1,363 | 53.4% | 43.4% | D+10.0 |
| Precinct -417417 | 608 | 725 | 30 | 1,363 | 44.6% | 53.2% | R+8.6 |
| Precinct -121121 | 614 | 699 | 38 | 1,351 | 45.4% | 51.7% | R+6.3 |
| Precinct -421421 | 640 | 673 | 33 | 1,346 | 47.5% | 50.0% | R+2.5 |
| Precinct -302302 | 733 | 560 | 39 | 1,332 | 55.0% | 42.0% | D+13.0 |
| Precinct -501501 | 621 | 679 | 31 | 1,331 | 46.7% | 51.0% | R+4.4 |
| Precinct -508508 | 656 | 620 | 53 | 1,329 | 49.4% | 46.7% | D+2.7 |
| Precinct -110110 | 617 | 677 | 34 | 1,328 | 46.5% | 51.0% | R+4.5 |
| Precinct -213213 | 839 | 409 | 60 | 1,308 | 64.1% | 31.3% | D+32.9 |
| Precinct -304304 | 698 | 563 | 45 | 1,306 | 53.4% | 43.1% | D+10.3 |
| Precinct -403403 | 668 | 591 | 39 | 1,298 | 51.5% | 45.5% | D+5.9 |
| Precinct -425425 | 526 | 689 | 19 | 1,234 | 42.6% | 55.8% | R+13.2 |
| Precinct -420420 | 467 | 724 | 32 | 1,223 | 38.2% | 59.2% | R+21.0 |
| Precinct -322322 | 721 | 463 | 35 | 1,219 | 59.1% | 38.0% | D+21.2 |
| Precinct -521521 | 906 | 257 | 31 | 1,194 | 75.9% | 21.5% | D+54.4 |
| Precinct -219219 | 779 | 360 | 26 | 1,165 | 66.9% | 30.9% | D+36.0 |
| Precinct -405405 | 561 | 581 | 23 | 1,165 | 48.2% | 49.9% | R+1.7 |
| Precinct -218218 | 886 | 227 | 48 | 1,161 | 76.3% | 19.6% | D+56.8 |
| Precinct -315315 | 856 | 252 | 49 | 1,157 | 74.0% | 21.8% | D+52.2 |
| Precinct -401401 | 604 | 479 | 54 | 1,137 | 53.1% | 42.1% | D+11.0 |
| Precinct -212212 | 829 | 279 | 28 | 1,136 | 73.0% | 24.6% | D+48.4 |
| Precinct -311311 | 755 | 318 | 41 | 1,114 | 67.8% | 28.5% | D+39.2 |
| Precinct -211211 | 681 | 373 | 41 | 1,095 | 62.2% | 34.1% | D+28.1 |
| Precinct -515515 | 420 | 634 | 36 | 1,090 | 38.5% | 58.2% | R+19.6 |
| Precinct -209209 | 601 | 435 | 28 | 1,064 | 56.5% | 40.9% | D+15.6 |
| Precinct -408408 | 562 | 468 | 30 | 1,060 | 53.0% | 44.2% | D+8.9 |
| Precinct -118118 | 434 | 538 | 28 | 1,000 | 43.4% | 53.8% | R+10.4 |
| Precinct -319319 | 748 | 203 | 40 | 991 | 75.5% | 20.5% | D+55.0 |
| Precinct -416416 | 502 | 440 | 27 | 969 | 51.8% | 45.4% | D+6.4 |
| Precinct -412412 | 413 | 509 | 29 | 951 | 43.4% | 53.5% | R+10.1 |
| Precinct -415415 | 338 | 547 | 26 | 911 | 37.1% | 60.0% | R+22.9 |
| Precinct -317317 | 638 | 214 | 39 | 891 | 71.6% | 24.0% | D+47.6 |
| Precinct -407407 | 476 | 367 | 30 | 873 | 54.5% | 42.0% | D+12.5 |
| Precinct -305305 | 442 | 366 | 25 | 833 | 53.1% | 43.9% | D+9.1 |
| Precinct -115115 | 257 | 554 | 18 | 829 | 31.0% | 66.8% | R+35.8 |
| Precinct -306306 | 443 | 267 | 26 | 736 | 60.2% | 36.3% | D+23.9 |
| Precinct -413413 | 361 | 349 | 20 | 730 | 49.5% | 47.8% | D+1.6 |
| Precinct -210210 | 405 | 298 | 13 | 716 | 56.6% | 41.6% | D+14.9 |
| Precinct -114114 | 233 | 445 | 18 | 696 | 33.5% | 63.9% | R+30.5 |
| Precinct -104104 | 309 | 362 | 19 | 690 | 44.8% | 52.5% | R+7.7 |
| Precinct -107107 | 309 | 325 | 25 | 659 | 46.9% | 49.3% | R+2.4 |
| Precinct -414414 | 383 | 224 | 19 | 626 | 61.2% | 35.8% | D+25.4 |
| Precinct -516516 | 441 | 148 | 27 | 616 | 71.6% | 24.0% | D+47.6 |
| Precinct -410410 | 229 | 365 | 16 | 610 | 37.5% | 59.8% | R+22.3 |
| Precinct -324324 | 332 | 246 | 18 | 596 | 55.7% | 41.3% | D+14.4 |
| Precinct -513513 | 148 | 377 | 11 | 536 | 27.6% | 70.3% | R+42.7 |
| Precinct -512512 | 160 | 330 | 10 | 500 | 32.0% | 66.0% | R+34.0 |
| Precinct -112112 | 155 | 318 | 15 | 488 | 31.8% | 65.2% | R+33.4 |
| Precinct -208208 | 352 | 107 | 17 | 476 | 73.9% | 22.5% | D+51.5 |
| Precinct -428428 | 240 | 190 | 10 | 440 | 54.5% | 43.2% | D+11.4 |
| Precinct -201201 | 164 | 239 | 12 | 415 | 39.5% | 57.6% | R+18.1 |
| Precinct -404404 | 156 | 222 | 14 | 392 | 39.8% | 56.6% | R+16.8 |
| Precinct -116116 | 125 | 247 | 7 | 379 | 33.0% | 65.2% | R+32.2 |
| Precinct -419419 | 118 | 234 | 9 | 361 | 32.7% | 64.8% | R+32.1 |
| Precinct -303303 | 178 | 171 | 9 | 358 | 49.7% | 47.8% | D+2.0 |
| Precinct -427427 | 172 | 165 | 11 | 348 | 49.4% | 47.4% | D+2.0 |
| Precinct -MB03MB03 | 132 | 112 | 9 | 253 | 52.2% | 44.3% | D+7.9 |
| Precinct -MB44MB44 | 43 | 138 | 8 | 189 | 22.8% | 73.0% | R+50.3 |
| Precinct -MB45MB45 | 52 | 79 | 3 | 134 | 38.8% | 59.0% | R+20.1 |
| Precinct -MB43MB43 | 57 | 71 | 3 | 131 | 43.5% | 54.2% | R+10.7 |
| Precinct -MB33MB33 | 59 | 65 | 2 | 126 | 46.8% | 51.6% | R+4.8 |
| Precinct -MB20MB20 | 72 | 45 | 4 | 121 | 59.5% | 37.2% | D+22.3 |
| Precinct -MB26MB26 | 33 | 73 | 2 | 108 | 30.6% | 67.6% | R+37.0 |
| Precinct -MB05MB05 | 51 | 40 | 0 | 91 | 56.0% | 44.0% | D+12.1 |
| Precinct -MB04MB04 | 30 | 38 | 7 | 75 | 40.0% | 50.7% | R+10.7 |
| Precinct -MB13MB13 | 24 | 41 | 0 | 65 | 36.9% | 63.1% | R+26.2 |
| Precinct -MB07MB07 | 18 | 26 | 1 | 45 | 40.0% | 57.8% | R+17.8 |
| Precinct -MB36MB36 | 6 | 34 | 0 | 40 | 15.0% | 85.0% | R+70.0 |
| Precinct -MB25MB25 | 21 | 15 | 2 | 38 | 55.3% | 39.5% | D+15.8 |
| Precinct -MB06MB06 | 16 | 21 | 0 | 37 | 43.2% | 56.8% | R+13.5 |
| Precinct -MB31MB31 | 15 | 21 | 0 | 36 | 41.7% | 58.3% | R+16.7 |
| Precinct -MB19MB19 | 10 | 20 | 2 | 32 | 31.3% | 62.5% | R+31.3 |
| Precinct -MB29MB29 | 10 | 15 | 1 | 26 | 38.5% | 57.7% | R+19.2 |
| Precinct -MB10MB10 | 11 | 11 | 0 | 22 | 50.0% | 50.0% | Even |
| Precinct -MB42MB42 | 2 | 20 | 0 | 22 | 9.1% | 90.9% | R+81.8 |
| Precinct -MB14MB14 | 6 | 14 | 0 | 20 | 30.0% | 70.0% | R+40.0 |
| Precinct -MB17MB17 | 2 | 15 | 3 | 20 | 10.0% | 75.0% | R+65.0 |
| Precinct -MB09MB09 | 7 | 8 | 1 | 16 | 43.8% | 50.0% | R+6.3 |
| Precinct -MB28MB28 | 2 | 9 | 1 | 12 | 16.7% | 75.0% | R+58.3 |
| Precinct -MB41MB41 | 1 | 9 | 0 | 10 | 10.0% | 90.0% | R+80.0 |
Presidential margin, 1876–2024
Democratic minus Republican, by election
| Year | Margin (D minus R) |
|---|---|
| 1876 | +10.0% |
| 1880 | −5.8% |
| 1884 | −6.8% |
| 1888 | −3.1% |
| 1892 | −6.2% |
| 1896 | +10.1% |
| 1900 | +4.4% |
| 1904 | −23.1% |
| 1908 | −15.8% |
| 1912 | +40.5% |
| 1916 | +9.6% |
| 1920 | −37.4% |
| 1924 | −39.6% |
| 1928 | −23.4% |
| 1932 | +37.2% |
| 1936 | +23.8% |
| 1940 | +8.1% |
| 1944 | +1.7% |
| 1948 | −11.3% |
| 1952 | −31.0% |
| 1956 | −17.4% |
| 1960 | −8.7% |
| 1964 | +19.8% |
| 1968 | −9.5% |
| 1972 | −15.3% |
| 1976 | −5.3% |
| 1980 | −26.1% |
| 1984 | −28.7% |
| 1988 | −13.1% |
| 1992 | +3.6% |
| 1996 | −6.3% |
| 2000 | −11.3% |
| 2004 | −7.2% |
| 2008 | +5.3% |
| 2012 | +1.0% |
| 2016 | +8.0% |
| 2020 | +13.1% |
| 2024 | +10.9% |
U.S. Senate
Registered voters
By party of registration, over time
Registration leans Democratic; the presidential vote runs 7.4 points more Republican.
179,396 registered voters · 2024 · down from 181,647 in 2022
Who moves in and out
Net migration over time, and who arrivals are — where they came from and what those places vote
+281 net domestic migration · 2025
Net +9,468 over 2011–2025 · gain loss
Arrivals reported $103,869 in average income, against $106,782 for residents who stayed — 3% lower. (IRS SOI, 2022–23)
The places arrivals came from lean D+18.9 on average — 8.0 points more Democratic-leaning than San Luis Obispo County, CA itself (D+10.9).
Where arrivals came from lean of each source
- Santa Barbara County, CA840D+26.7
- Los Angeles County, CA627D+32.9
- Kern County, CA267R+21.1
- Santa Clara County, CA266D+40.0
- San Diego County, CA256D+16.8
- Fresno County, CA251R+4.4
Where departures went households, 2022–23
- Santa Barbara County, CA722
- Los Angeles County, CA399
- San Diego County, CA348
- Orange County, CA227
- Fresno County, CA187
- Kern County, CA169
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 | +839 |
| 2012 | +2,644 |
| 2013 | +1,038 |
| 2014 | +1,937 |
| 2015 | +1,364 |
| 2016 | +1,260 |
| 2017 | +536 |
| 2018 | +873 |
| 2019 | −245 |
| 2021 | −2,276 |
| 2022 | +2,598 |
| 2023 | −806 |
| 2024 | −575 |
| 2025 | +281 |
Home to Cal Poly San Luis Obispo, the county's electorate skews younger and more educated than its Central Coast neighbors, a demographic mix that has steadily widened its Democratic presidential margin over the past two decades.
Across the recorded series it reached a Democratic high of 40.5 points in 1912 and a Republican high of 39.6 points in 1924. Between 2020 and 2024 the county moved 2.2 points toward the Republican candidate; the 2024 margin was 10.9 points.
A population of 281,555, a 65% non-Hispanic-white share, and a median household income of $97,446 describe the county. The county's voting pattern over the last decade is most similar to that of Jefferson County and Arapahoe 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 →
San Luis Obispo County, California. Akashic. https://akashic.app/county/06079/. Accessed May 20, 2026. License: CC BY 4.0.