HarrisDemocratic44.2%2,889TrumpRepublican54.2%3,542OtherAll other candidates1.5%101
R+10.0- Lead
- 653
- Total
- 6,532
- vs nation
- R+8.5
- Turnout
- —
Akashiccity
Key Biscayne, FL
Office (updates table and map)
President margin by year
Place winner margin
Boundary by 2024 margin · Precinct returns · VEST · MIT Election Lab
President results by year
Vote totals, margins, and source status
BidenDemocratic51.9%3,412TrumpRepublican47.2%3,107OtherAll other candidates0.9%57
D+4.6- Lead
- 305
- Total
- 6,576
- vs nation
- D+0.2
- Turnout
- —
ClintonDemocratic58.4%3,099TrumpRepublican37.4%1,985OtherAll other candidates4.1%220
D+21.0- Lead
- 1,114
- Total
- 5,304
- vs nation
- D+18.9
- Turnout
- —
ObamaDemocratic44.2%2,189RomneyRepublican55.4%2,747OtherAll other candidates0.4%22
R+11.3- Lead
- 558
- Total
- 4,958
- vs nation
- R+15.1
- Turnout
- —
ObamaDemocratic47.5%2,149McCainRepublican52.0%2,354OtherAll other candidates0.4%20
R+4.5- Lead
- 205
- Total
- 4,523
- vs nation
- R+11.8
- Turnout
- —
KerryDemocratic42.6%1,763BushRepublican57.0%2,360OtherAll other candidates0.4%15
R+14.4- Lead
- 597
- Total
- 4,138
- vs nation
- R+12.0
- Turnout
- —
Key facts
- 2024 presidential margin
- R+10.0MIT Election Lab
- Population
- 14,7912024 5-year
- Median household income
- $181,5052024 5-year
- White (non-Hispanic)
- 23.2%2024 5-year
- Black
- 0.5%2024 5-year
- Hispanic / Latino
- 72.8%2024 5-year
- Peak Democratic margin
- D+21.0 in 2016MIT Election Lab
- Peak Republican margin
- R+14.4 in 2004MIT Election Lab
- Most similar
- Pinecrest, FL · twin score 92.1
presidential history
Presidential margin, 2004–2024
Democratic minus Republican, by election
| Year | Margin (D minus R) |
|---|---|
| 2004 | −14.4% |
| 2008 | −4.5% |
| 2012 | −11.3% |
| 2016 | +21.0% |
| 2020 | +4.6% |
| 2024 | −10.0% |
DemocraticRepublican
6 presidential elections
| Year | Won | Democratic | Republican | Other | Margin | Swing | vs U.S. | Total |
|---|---|---|---|---|---|---|---|---|
| R | 44.2%Harris2,889 | 54.2%Trump3,542 | 1.5% | R+10.0 | R+14.6 | R+8.5 | 6,532 | |
| D | 51.9%Biden3,412 | 47.2%Trump3,107 | 0.9% | D+4.6 | R+16.4 | D+0.2 | 6,576 | |
| D | 58.4%Clinton3,099 | 37.4%Trump1,985 | 4.1% | D+21.0 | D+32.3 | D+18.9 | 5,304 | |
| R | 44.2%Obama2,189 | 55.4%Romney2,747 | 0.4% | R+11.3 | R+6.7 | R+15.1 | 4,958 | |
| R | 47.5%Obama2,149 | 52.0%McCain2,354 | 0.4% | R+4.5 | — | R+11.8 | 4,523 | |
| R | 42.6%Kerry1,763 | 57.0%Bush2,360 | 0.4% | R+14.4 | — | R+12.0 | 4,138 |
Federal and statewide elections · 2 House · 1 Senate
U.S. House
Each row shows U.S. House votes counted inside this Place. “Vote lead” is the local lead here, not necessarily the winner of the full contest.
| Year | Vote lead | Democratic | Republican | Total |
|---|---|---|---|---|
| 2024 | R | 38.9%2,494 | 61.1%3,917 | 6,411 |
| 2020 | R | 47.7%3,083 | 52.3%3,374 | 6,457 |
U.S. Senate
| Year | Won | Democratic | Republican | Total |
|---|---|---|---|---|
| 2024 | R | 42.2%2,730 | 56.9%3,681 | 6,468 |
Key Biscayne's dense concentration of high-income, internationally connected residents produces some of Miami-Dade County's highest per-capita voter participation rates, with presidential margins often decided by fewer than 500 votes.
Across the recorded series it reached a Democratic high of 21.0 points in 2016 and a Republican high of 14.4 points in 2004. Between 2020 and 2024 the city moved 14.6 points toward the Republican candidate; the 2024 margin was 10.0 points.
A population of 14,791, a 23% non-Hispanic-white share, and a median household income of $181,505 describe the city. The city's voting pattern over the last decade is most similar to that of Pinecrest and Coral Gables.
Political twins — cities
The cities whose fingerprint — 2000–2024 trajectory, demographics, ancestry, religion — sits closest to this one, and why.
Pinecrest
Florida
92.1twin score
median income2016 marginelasticity≠ % Latino
Coral Gables
Florida
86.6twin score
% Latinoelasticity2016 margin≠ population scale
Palmetto Bay
Florida
86.3twin score
% Latinomedian income2016 margin≠ American ancestry
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 →
Cite this page
All citations released under CC BY 4.0. Attribution: Akashic Intelligence.
Key Biscayne, Florida. Akashic. https://akashic.app/city/1236300/. Accessed May 20, 2026. License: CC BY 4.0.
License: CC BY 4.0
Florida at the ballot boxAll elections →
Frequently asked questions
How did Key Biscayne, Florida vote in 2024?
In 2024, Key Biscayne, Florida voted Republican by 10.0 points (R+10.0), carried by the Republican candidate. Out of 6,532 votes cast, 2,889 went Democratic and 3,542 went Republican.
When did Key Biscayne, Florida last vote Democratic?
The most recent presidential election in which Key Biscayne, Florida voted Democratic was 2020.
How many people live in Key Biscayne, Florida?
Key Biscayne, Florida has a population of 14,791 according to the 2024 American Community Survey 5-year estimates from the US Census Bureau.
What is the median household income in Key Biscayne, Florida?
Median household income in Key Biscayne, Florida is $181,505 — above the national median of $80,734. The Florida state median is $74,568.
What is the political history of Key Biscayne, Florida?
Akashic tracks 6 presidential elections in Key Biscayne, Florida from 2004 to 2024. Of those, 2 went Democratic and 4 went Republican.