2024 presidential election
Key Biscayne
TrumpR+10.0
Constituent county margins for Key Biscayne, FLOne cell per constituent county, colored by 2024 presidential margin from deep red (Republican) through neutral to deep blue (Democratic), ordered bluest first.
How it voted
Share of the 2024 vote
| Donald Trump ✓Republican | 54.2% | 3,542 |
|---|---|---|
| Kamala HarrisDemocratic | 44.2% | 2,889 |
| OtherAll other candidates | 1.5% | 101 |
D+60R+60
1 counties, each filled by 2024 D-vs-R margin.
presidential history
Presidential margin, 2008–2024
Democratic minus Republican, by election
| Year | Margin (D minus R) |
|---|---|
| 2008 | −4.5% |
| 2012 | −13.6% |
| 2016 | +21.0% |
| 2020 | +4.6% |
| 2024 | −10.0% |
DemocraticRepublican
5 presidential elections
| Year | Won | Margin | Democratic | Republican | Total |
|---|---|---|---|---|---|
| R | 2,889 | 3,542 | 6,532 | ||
| D | 3,412 | 3,107 | 6,576 | ||
| D | 3,099 | 1,985 | 5,304 | ||
| R | 2,149 | 2,824 | 4,973 | ||
| R | 2,150 | 2,354 | 4,524 |
Demographics
Demographic profile
Demographic Profile
Key indicators compared across containing geographies
| Indicator | Key BiscayneCity | FloridaState | United StatesNation |
|---|---|---|---|
| Race & Ethnicity | |||
| White | 36.6% | 55.9% | 61.0% |
| Black | 0.8% | 15.1% | 12.2% |
| Asian | 0.1% | 2.9% | 6.0% |
| Two or more races | 58.7% | 19.3% | 12.6% |
| Other race | 3.8% | 6.7% | 8.2% |
| Hispanic or Latino | 70.3% | 27.4% | 19.3% |
| Income & Age | |||
| Median household income | $181,505 | $74,568 | $84,427 |
| Poverty rate | 5.5% | 12.6% | 12.5% |
| Median age | 42.2 | 43.1 | 39.1 |
| Age 18–24 | 8.2% | 8.1% | 9.2% |
| Age 65 and older | 16.9% | 21.3% | 17.2% |
| Education & Language | |||
| Bachelor's degree or higher (25+) | 77.2% | 34.1% | 35.7% |
| Speaks a non-English language at home | 80.4% | 30.6% | 22.3% |
| Spanish | 68.7% | 22.6% | 13.6% |
| Other Indo-European | 7.7% | 1.9% | 2.0% |
| Russian, Polish, or other Slavic | 1.5% | 0.7% | 0.7% |
| French (incl. Cajun & Haitian) | 1.0% | 2.7% | 0.7% |
| Ancestry | |||
| Largest ancestry | American 4.6% | German 8.9% | German 12.5% |
| 2nd-largest ancestry | Italian 2.4% | English 8.2% | English 9.5% |
| 3rd-largest ancestry | German 1.7% | Irish 8.2% | Irish 9.4% |
| Religion | |||
| Catholic | 29.9%County context | 19.0% | 18.6% |
| Evangelical Protestant | 13.0%County context | 18.5% | 16.5% |
| Unaffiliated or unclaimed | 48.7%County context | 53.1% | 51.5% |
ACS values are survey estimates and may include margins of error.
Religion data may be available only at county or larger geographies. Sub-county values are labeled when inherited, modeled, or contextual.
2024 ACS
Race, ethnicity, and ancestry
Click any group to see the ancestries typically reported within it.
American
4.6%
Italian
2.4%
German
1.7%
Irish
1.3%
English
1.2%
French
0.8%
Polish
0.7%
Source · American Community Survey 5-year estimates, 2024 release. Hispanic/Latino is an ethnicity that overlaps the race categories, so these shares can total more than 100%. Ancestry is a self-reported, multiple-response item; ancestry percentages do not sum to the parent race percentage.
2024 ACS
Age distribution by sex
Median age: 42.2 in this county, 39.1 nationally
Male
Age
Female
85+
75–84
65–74
55–64
45–54
35–44
25–34
18–24
5–17
<5
Source · American Community Survey 5-year estimates, 2024 release.
2024 ACS
Median household income
Inflation-adjusted dollars
$181,505
Key Biscayne$181,505
Florida$74,568
United States$80,734
Source · American Community Survey 5-year estimates, 2024 release.
2024 ACS
Poverty rate
All persons below federal poverty line
5.5%
Children face moderate poverty.
Children under 1818.2%
Working age (18–64)12.8%
Seniors (65+)23.9%
Source · American Community Survey 5-year estimates, 2024 release.
2024 ACS
Language at home
Population aged 5 and older
19.6%
speak English only
Spanish68.7%
Other Indo-European7.7%
Russian, Polish, or other Slavic1.5%
French (incl. Cajun & Haitian)1.0%
Other languages0.8%
German or other West Germanic0.5%
Other Asian & Pacific Island0.3%
Source · ACS 5-year estimates, 2024.
2020 religion census
Religious adherents
Adherents per capita by tradition
Unaffiliated or not counted48.7%
Source · 2020 US Religion Census. The unaffiliated-or-not-counted share is everyone not claimed as an adherent by any reporting body — uncounted congregations as well as the religiously unaffiliated.
Key Biscayne sits in the Gulf South and peninsula. In 2024 it voted Republican.
Across the recorded series it reached a Democratic high of 21.0 points in 2016 and a Republican high of 13.6 points in 2012. 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 37% non-Hispanic-white share, and a median household income of $181,505 describe the city.
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
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.
What is Key Biscayne, Florida's political typology?
Akashic places Key Biscayne, Florida in the "" typology. The typology is a data-driven cluster built from vote share, vote swing, race and ethnicity, income, language spoken at home, religion, and ancestry. Across 5 elections in the dataset, the city has voted Democratic 2 times, Republican 3 times, and other 0 times.
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 5 presidential elections in Key Biscayne, Florida from 2008 to 2024. Of those, 2 went Democratic and 3 went Republican. The city's typology — "" — captures where that record, its demographics, and its recent swing place it among American communities.