- Lead
- 11,972
- Total
- 39,756
- vs nation
- R+28.6
Oregon 18th State House District
President margin by year
Place winner margin
President results by year
Modeled candidate-vote estimate on current district boundaries
- Lead
- 10,253
- Total
- 41,086
- vs nation
- R+29.4
- Lead
- 8,284
- Total
- 33,468
- vs nation
- R+26.8
- Lead
- 8,192
- Total
- 29,692
- vs nation
- R+31.4
- Lead
- 6,707
- Total
- 29,731
- vs nation
- R+29.8
- Lead
- 10,505
- Total
- 31,840
- vs nation
- R+30.5
- Lead
- 8,127
- Total
- 26,997
- vs nation
- R+30.6
- Lead
- 5,059
- Total
- 24,447
- vs nation
- R+29.2
Key facts
- 2024 presidential margin
- R+30.1MIT Election Lab
- Population
- 71,2842024 5-year
- Population density
- 49 / sq mi2024 5-year · TIGER/Line
- Land area
- 1,441 sq miTIGER/Line
- Median household income
- $89,0632024 5-year
- White (non-Hispanic)
- 76.7%2024 5-year
- Black
- 0.4%2024 5-year
- Hispanic / Latino
- 16.0%2024 5-year
- Peak Democratic margin
- D+9.2 in 1936MIT Election Lab
- Peak Republican margin
- R+75.2 in 1904MIT Election Lab
- Most similar
- State House District 10, ID · twin score 89.8
presidential history
Party record book
Oregon 18th State House 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
51.5%
2,323 votes · D+9.2 · modeled estimate
Runner-up · Lyndon B. Johnson, 1964 · 49.9%
Republican
Theodore Roosevelt1904
84.0%
905 votes · R+75.2 · modeled estimate
Runner-up · Dwight D. Eisenhower, 1952 · 78.3%
Most votes
Largest number of votes cast for the party’s presidential nominee here.
Democratic
Joe Biden2020
14,785votes
36.0% of the vote · R+25.0 · modeled estimate
Runner-up · Kamala Harris, 2024 · 13,192 votes
Republican
Donald Trump2024
25,164votes
63.3% of the vote · R+30.1 · modeled estimate
Runner-up · Donald Trump, 2020 · 25,038 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
−15.1pts D vs U.S.
Place D+9.2 · U.S. D+24.3 · modeled estimate
Runner-up · George McGovern, 1972 · −18.0 pts
Republican
Theodore Roosevelt1904
+55.5pts R vs U.S.
Place R+75.2 · U.S. R+19.7 · modeled estimate
Runner-up · Benjamin Harrison, 1892 · +53.8 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 | R | 49.4%16,543 | 50.6%16,927 | 33,470 |
| 2020 | D | 51.8%18,467 | 48.2%17,217 | 35,684 |
Oregon 18th State House District sits in the Pacific Northwest. In 2024 it voted Republican.
Across the recorded series it reached a Democratic high of 9.2 points in 1936 and a Republican high of 75.2 points in 1904. Between 2020 and 2024 the district moved 5.2 points toward the Republican candidate; the 2024 margin was 30.1 points.
A population of 71,284, a 77% non-Hispanic-white share, and a median household income of $89,063 describe the district. The district's voting pattern over the last decade is most similar to that of State House District 10 and State House District 8.
The state-house 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 18th State House District. Akashic. https://akashic.app/sld-lower/41018/. Accessed May 20, 2026. License: CC BY 4.0.