- Lead
- 8,387
- Total
- 78,337
- vs nation
- R+9.2
Oregon 12th State Senate District
President margin by year
Place winner margin
President results by year
Modeled candidate-vote estimate on current district boundaries
- Lead
- 6,757
- Total
- 78,985
- vs nation
- R+13.0
- Lead
- 7,794
- Total
- 65,639
- vs nation
- R+14.0
- Lead
- 6,110
- Total
- 57,713
- vs nation
- R+14.4
- Lead
- 3,500
- Total
- 58,590
- vs nation
- R+13.2
- Lead
- 10,669
- Total
- 57,273
- vs nation
- R+16.2
- Lead
- 8,354
- Total
- 47,563
- vs nation
- R+18.1
- Lead
- 2,809
- Total
- 41,667
- vs nation
- R+15.3
Key facts
- 2024 presidential margin
- R+10.7MIT Election Lab
- Population
- 141,5262024 5-year
- Population density
- 100 / sq mi2024 5-year · TIGER/Line
- Land area
- 1,419 sq miTIGER/Line
- Median household income
- $86,7412024 5-year
- White (non-Hispanic)
- 75.5%2024 5-year
- Black
- 0.6%2024 5-year
- Hispanic / Latino
- 14.4%2024 5-year
- Peak Democratic margin
- D+19.7 in 1964MIT Election Lab
- Peak Republican margin
- R+46.7 in 1904MIT Election Lab
- Most similar
- State Senate District 6, OR · twin score 84.3
presidential history
Party record book
Oregon 12th State Senate District · the strongest Democratic and Republican presidential performances recorded here, measured three ways.
1892–2024 (partial returns from 1876) · 38 presidential cycles · 38 with a vote-share denominator · 34 with a national benchmark
Highest vote share
Largest share of the presidential candidate vote cast here.
Democratic
Lyndon B. Johnson1964
59.8%
11,384 votes · D+19.7 · modeled estimate
Runner-up · Franklin D. Roosevelt, 1936 · 54.6%
Republican
Dwight D. Eisenhower1952
69.7%
12,726 votes · R+39.9 · modeled estimate
Runner-up · Herbert Hoover, 1928 · 69.2%
Most votes
Largest number of votes cast for the party’s presidential nominee here.
Democratic
Joe Biden2020
34,706votes
43.9% of the vote · R+8.6 · modeled estimate
Runner-up · Kamala Harris, 2024 · 33,477 votes
Republican
Donald Trump2024
41,864votes
53.4% of the vote · R+10.7 · modeled estimate
Runner-up · Donald Trump, 2020 · 41,463 votes
Best relative to the U.S.
This Place’s margin against the national margin in the same election — positive when it leaned toward the party more than the country did.
Democratic
William J. Bryan1896
+1.0pts D vs U.S.
Place R+5.1 · U.S. R+6.1 · modeled estimate
Runner-up · James M. Cox, 1920 · −2.7 pts
Republican
Benjamin Harrison1892
+30.0pts R vs U.S.
Place R+28.4 · U.S. D+1.7 · modeled estimate
Runner-up · Dwight D. Eisenhower, 1952 · +29.1 pts
Current officeholders
State legislative officeholder from OpenStates nightly current-legislator data.
Senate and governor results are in the Office selector at the top of this page.
U.S. House
Each row is a county-allocated estimate of U.S. House votes for this district — county returns apportioned onto its boundary, not precinct-counted. “Vote lead” is the estimated local lead here, not necessarily the winner of the full contest.
| Year | Vote lead | Democratic | Republican | Total |
|---|---|---|---|---|
| 2024 | R | 45.7%33,271 | 54.3%39,465 | 72,736 |
| 2020 | R | 48.8%35,688 | 51.2%37,411 | 73,099 |
Its Republican presidential margin was R+10.7 in 2024 and R+6.0 in 2008. The district had about 193,000 residents, 77.1% White alone in the 2024 ACS 5-year.
Across the recorded series it reached a Democratic high of 19.7 points in 1964 and a Republican high of 46.7 points in 1904. Between 2020 and 2024 the district moved 2.2 points toward the Republican candidate; the 2024 margin was 10.7 points.
A population of 141,526, a 76% non-Hispanic-white share, and a median household income of $86,741 describe the district. The district's voting pattern over the last decade is most similar to that of State Senate District 6 and State Senate District 23.
The state-senate districts 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.
District research tools
Open the source-auditable district brief for electoral baseline, electorate, current-cycle coverage, geography, official dates, and methodology. Open campaign intelligence report → · Browse all comparisons →
Oregon 12th State Senate District. Akashic. https://akashic.app/sld-upper/41012/. Accessed May 20, 2026. License: CC BY 4.0.