- Lead
- 10,303
- Total
- 75,146
- vs nation
- D+15.2
Oregon 20th State Senate District
President margin by year
Place winner margin
President results by year
Modeled candidate-vote estimate on current district boundaries
- Lead
- 11,724
- Total
- 80,093
- vs nation
- D+10.2
- Lead
- 5,973
- Total
- 65,384
- vs nation
- D+7.0
- Lead
- 3,839
- Total
- 57,593
- vs nation
- D+2.8
- Lead
- 7,837
- Total
- 58,269
- vs nation
- D+6.2
- Lead
- 982
- Total
- 59,088
- vs nation
- D+4.1
- Lead
- 1,178
- Total
- 49,321
- vs nation
- D+1.9
- Lead
- 3,750
- Total
- 44,312
- vs nation
- R+0.1
Key facts
- 2024 presidential margin
- D+13.7MIT Election Lab
- Population
- 141,8742024 5-year
- Population density
- 2,981 / sq mi2024 5-year · TIGER/Line
- Land area
- 47.6 sq miTIGER/Line
- Median household income
- $94,2102024 5-year
- White (non-Hispanic)
- 72.1%2024 5-year
- Black
- 1.6%2024 5-year
- Hispanic / Latino
- 11.0%2024 5-year
- Peak Democratic margin
- D+41.7 in 1936MIT Election Lab
- Peak Republican margin
- R+50.3 in 1904MIT Election Lab
- Most similar
- State Senate District 13, OR · twin score 94.0
presidential history
Party record book
Oregon 20th 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
Franklin D. Roosevelt1936
67.8%
4,478 votes · D+41.7 · modeled estimate
Runner-up · Lyndon B. Johnson, 1964 · 63.7%
Republican
Theodore Roosevelt1904
67.1%
819 votes · R+50.3 · modeled estimate
Runner-up · Warren G. Harding, 1920 · 58.0%
Most votes
Largest number of votes cast for the party’s presidential nominee here.
Democratic
Joe Biden2020
44,603votes
55.7% of the vote · D+14.6 · modeled estimate
Runner-up · Kamala Harris, 2024 · 41,238 votes
Republican
Donald Trump2020
32,879votes
41.1% of the vote · D+14.6 · modeled estimate
Runner-up · Donald Trump, 2024 · 30,935 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
Franklin D. Roosevelt1936
+17.4pts D vs U.S.
Place D+41.7 · U.S. D+24.3 · modeled estimate
Runner-up · Kamala Harris, 2024 · +15.2 pts
Republican
Theodore Roosevelt1904
+30.6pts R vs U.S.
Place R+50.3 · U.S. R+19.7 · modeled estimate
Runner-up · Benjamin Harrison, 1892 · +27.8 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 | D | 51.7%38,382 | 48.3%35,926 | 74,308 |
| 2020 | D | 54.0%43,534 | 46.0%37,115 | 80,649 |
In 2024 it voted Democratic by D+13.7, against D+13.4 in 2008. The district had about 10,900 residents, 78.5% White alone in the 2024 ACS 5-year.
Across the recorded series it reached a Democratic high of 41.7 points in 1936 and a Republican high of 50.3 points in 1904. Between 2020 and 2024 the district moved 0.9 points toward the Republican candidate; the 2024 margin was 13.7 points.
A population of 141,874, a 72% non-Hispanic-white share, and a median household income of $94,210 describe the district. The district's voting pattern over the last decade is most similar to that of State Senate District 13 and State Senate District 19.
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 20th State Senate District. Akashic. https://akashic.app/sld-upper/41020/. Accessed May 20, 2026. License: CC BY 4.0.