Lewis and Clark County, Montana
Precinct data
Results by precinct
32 precincts · 42,023 votes
Precinct boundaries and identifiers are cycle-specific. This table does not join rows across years without a validated crosswalk.
| Precinct -PCT 04PCT 04 | 649 | 1,291 | 59 | 1,999 | 32.5% | 64.6% | R+32.1 |
|---|---|---|---|---|---|---|---|
| Precinct -PCT 20PCT 20 | 714 | 1,181 | 85 | 1,980 | 36.1% | 59.6% | R+23.6 |
| Precinct -PCT 02PCT 02 | 1,472 | 435 | 66 | 1,973 | 74.6% | 22.0% | D+52.6 |
| Precinct -PCT 21PCT 21 | 626 | 1,263 | 63 | 1,952 | 32.1% | 64.7% | R+32.6 |
| Precinct -PCT 03PCT 03 | 1,005 | 843 | 63 | 1,911 | 52.6% | 44.1% | D+8.5 |
| Precinct -PCT 24PCT 24 | 610 | 1,205 | 57 | 1,872 | 32.6% | 64.4% | R+31.8 |
| Precinct -PCT 18PCT 18 | 1,094 | 686 | 63 | 1,843 | 59.4% | 37.2% | D+22.1 |
| Precinct -PCT 12PCT 12 | 624 | 1,082 | 64 | 1,770 | 35.3% | 61.1% | R+25.9 |
| Precinct -PCT 13PCT 13 | 1,311 | 323 | 66 | 1,700 | 77.1% | 19.0% | D+58.1 |
| Precinct -PCT 11PCT 11 | 767 | 824 | 59 | 1,650 | 46.5% | 49.9% | R+3.5 |
| Precinct -PCT 22PCT 22 | 507 | 1,082 | 42 | 1,631 | 31.1% | 66.3% | R+35.3 |
| Precinct -PCT 16PCT 16 | 483 | 1,057 | 80 | 1,620 | 29.8% | 65.2% | R+35.4 |
| Precinct -PCT 06PCT 06 | 604 | 889 | 70 | 1,563 | 38.6% | 56.9% | R+18.2 |
| Precinct -PCT 09PCT 09 | 1,076 | 410 | 54 | 1,540 | 69.9% | 26.6% | D+43.2 |
| Precinct -PCT 17PCT 17 | 1,106 | 397 | 36 | 1,539 | 71.9% | 25.8% | D+46.1 |
| Precinct -PCT 10PCT 10 | 869 | 586 | 54 | 1,509 | 57.6% | 38.8% | D+18.8 |
| Precinct -PCT 14PCT 14 | 803 | 624 | 73 | 1,500 | 53.5% | 41.6% | D+11.9 |
| Precinct -PCT 08PCT 08 | 736 | 581 | 50 | 1,367 | 53.8% | 42.5% | D+11.3 |
| Precinct -PCT 05PCT 05 | 654 | 614 | 54 | 1,322 | 49.5% | 46.4% | D+3.0 |
| Precinct -PCT 07PCT 07 | 681 | 599 | 40 | 1,320 | 51.6% | 45.4% | D+6.2 |
| Precinct -PCT 19PCT 19 | 522 | 602 | 31 | 1,155 | 45.2% | 52.1% | R+6.9 |
| Precinct -PCT 23PCT 23 | 355 | 758 | 35 | 1,148 | 30.9% | 66.0% | R+35.1 |
| Precinct -PCT 28PCT 28 | 341 | 704 | 48 | 1,093 | 31.2% | 64.4% | R+33.2 |
| Precinct -PCT 27PCT 27 | 307 | 722 | 47 | 1,076 | 28.5% | 67.1% | R+38.6 |
| Precinct -PCT 15PCT 15 | 279 | 519 | 24 | 822 | 33.9% | 63.1% | R+29.2 |
| Precinct -PCT 29PCT 29 | 159 | 636 | 19 | 814 | 19.5% | 78.1% | R+58.6 |
| Precinct -PCT 01PCT 01 | 241 | 402 | 21 | 664 | 36.3% | 60.5% | R+24.2 |
| Precinct -PCT 25PCT 25 | 235 | 391 | 14 | 640 | 36.7% | 61.1% | R+24.4 |
| Precinct -PCT 30PCT 30 | 129 | 326 | 8 | 463 | 27.9% | 70.4% | R+42.5 |
| Precinct -PCT 32PCT 32 | 92 | 313 | 11 | 416 | 22.1% | 75.2% | R+53.1 |
| Precinct -PCT 26PCT 26 | 27 | 68 | 0 | 95 | 28.4% | 71.6% | R+43.2 |
| Precinct -PCT 31PCT 31 | 7 | 66 | 3 | 76 | 9.2% | 86.8% | R+77.6 |
Presidential margin, 1892–2024
Democratic minus Republican, by election
| Year | Margin (D minus R) |
|---|---|
| 1892 | +1.5% |
| 1896 | +57.5% |
| 1900 | +14.8% |
| 1904 | −21.0% |
| 1908 | +0.7% |
| 1912 | +10.2% |
| 1916 | +11.5% |
| 1920 | −28.0% |
| 1924 | −22.7% |
| 1928 | −15.0% |
| 1932 | +12.1% |
| 1936 | +30.5% |
| 1940 | +9.8% |
| 1944 | +2.8% |
| 1948 | −4.2% |
| 1952 | −25.3% |
| 1956 | −28.8% |
| 1960 | −9.4% |
| 1964 | +9.9% |
| 1968 | −18.4% |
| 1972 | −26.8% |
| 1976 | −11.0% |
| 1980 | −25.0% |
| 1984 | −21.2% |
| 1988 | +4.2% |
| 1992 | +6.7% |
| 1996 | −0.5% |
| 2000 | −18.7% |
| 2004 | −12.7% |
| 2008 | +6.5% |
| 2012 | −3.6% |
| 2016 | −6.8% |
| 2020 | −3.9% |
| 2024 | −5.7% |
U.S. Senate
Registered voters
Total registered voters, over time
| Year | Total registered |
|---|---|
| 2016 | 45,342 |
| 2018 | 47,093 |
| 2020 | 50,238 |
| 2022 | 51,558 |
| 2024 | 53,766 |
Who moves in and out
Net migration over time, and who arrivals are — where they came from and what those places vote
+265 net domestic migration · 2025
Net +8,531 over 2011–2025 · gain loss
Arrivals reported $68,328 in average income, against $85,179 for residents who stayed — 20% lower. (IRS SOI, 2022–23)
The places arrivals came from lean R+8.5 on average — 2.8 points more Republican-leaning than Lewis and Clark County, MT itself (R+5.7).
Where arrivals came from lean of each source
- Gallatin County, MT134D+3.2
- Missoula County, MT133D+21.4
- Jefferson County, MT127R+36.5
- Cascade County, MT85R+22.3
- Yellowstone County, MT82R+27.1
- Broadwater County, MT53R+60.0
Where departures went households, 2022–23
- Missoula County, MT142
- Jefferson County, MT133
- Gallatin County, MT120
- Cascade County, MT107
- Yellowstone County, MT79
- Broadwater County, MT54
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 | +432 |
| 2012 | +260 |
| 2013 | +184 |
| 2014 | +289 |
| 2015 | +356 |
| 2016 | +460 |
| 2017 | +813 |
| 2018 | +711 |
| 2019 | +740 |
| 2021 | +1,381 |
| 2022 | +1,210 |
| 2023 | +1,143 |
| 2024 | +287 |
| 2025 | +265 |
Home to Helena and a sizable state-government workforce, Lewis and Clark voted within single digits in several recent cycles before settling at R+5.7 in 2024 — a narrower margin than most Montana counties but a notable shift from its earlier swing-county status.
Across the recorded series it reached a Democratic high of 57.5 points in 1896 and a Republican high of 28.8 points in 1956. Between 2020 and 2024 the county moved 1.8 points toward the Republican candidate; the 2024 margin was 5.7 points.
A population of 73,464, a 89% non-Hispanic-white share, and a median household income of $78,237 describe the county. The county's voting pattern over the last decade is most similar to that of Missoula County and Clinton 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 →
Lewis and Clark County, Montana. Akashic. https://akashic.app/county/30049/. Accessed May 20, 2026. License: CC BY 4.0.