- Lead
- 3,380
- Total
- 22,293
- vs nation
- D+16.6
Hawaii 18th State Senate District
President margin by year
Place winner margin
President results by year
Modeled candidate-vote estimate on current district boundaries
- Lead
- 4,794
- Total
- 23,987
- vs nation
- D+15.5
- Lead
- 4,344
- Total
- 18,078
- vs nation
- D+21.9
- Lead
- 6,237
- Total
- 18,743
- vs nation
- D+29.4
- Lead
- 6,857
- Total
- 19,338
- vs nation
- D+28.2
- Lead
- 800
- Total
- 19,382
- vs nation
- R+1.7
- Lead
- 1,386
- Total
- 16,369
- vs nation
- D+7.9
- Lead
- 2,749
- Total
- 16,165
- vs nation
- D+8.5
Key facts
- 2024 presidential margin
- D+15.2MIT Election Lab
- Population
- 54,5662024 5-year
- Population density
- 1,789 / sq mi2024 5-year · TIGER/Line
- Land area
- 30.5 sq miTIGER/Line
- Median household income
- $123,1572024 5-year
- White (non-Hispanic)
- 9.1%2024 5-year
- Black
- 1.4%2024 5-year
- Hispanic / Latino
- 8.8%2024 5-year
- Peak Democratic margin
- D+51.9 in 1964MIT Election Lab
- Peak Republican margin
- R+33.1 in 1972MIT Election Lab
- Most similar
- State Senate District 16, HI · twin score 98.5
presidential history
Party record book
Hawaii 18th State Senate District · the strongest Democratic and Republican presidential performances recorded here, measured three ways.
1960–2024 · 17 presidential cycles
Highest vote share
Largest share of the presidential candidate vote cast here.
Democratic
Lyndon B. Johnson1964
75.9%
7,380 votes · D+51.9 · modeled estimate
Runner-up · Barack Obama, 2008 · 67.1%
Republican
Richard Nixon1972
66.5%
9,273 votes · R+33.1 · modeled estimate
Runner-up · Ronald Reagan, 1984 · 59.5%
Most votes
Largest number of votes cast for the party’s presidential nominee here.
Democratic
Joe Biden2020
14,183votes
59.1% of the vote · D+20.0 · modeled estimate
Runner-up · Barack Obama, 2008 · 12,972 votes
Republican
George W. Bush2004
10,033votes
51.8% of the vote · R+4.1 · modeled estimate
Runner-up · Ronald Reagan, 1984 · 9,765 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
Barack Obama2012
+29.4pts D vs U.S.
Place D+33.3 · U.S. D+3.9 · modeled estimate
Runner-up · Lyndon B. Johnson, 1964 · +29.3 pts
Republican
Richard Nixon1972
+9.9pts R vs U.S.
Place R+33.1 · U.S. R+23.2 · modeled estimate
Runner-up · Gerald Ford, 1976 · +7.6 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.
Anchored in urban Honolulu, this district has delivered Democratic presidential margins exceeding 30 points in recent cycles, reflecting a dense, multiethnic electorate with deep roots in the state's labor and public-sector organizing tradition.
Across the recorded series it reached a Democratic high of 51.9 points in 1964 and a Republican high of 33.1 points in 1972. Between 2020 and 2024 the district moved 4.8 points toward the Republican candidate; the 2024 margin was 15.2 points.
A population of 54,566, a 9% non-Hispanic-white share, and a median household income of $123,157 describe the district. The district's voting pattern over the last decade is most similar to that of State Senate District 16 and State Senate District 17.
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 →
Hawaii 18th State Senate District. Akashic. https://akashic.app/sld-upper/15018/. Accessed May 20, 2026. License: CC BY 4.0.