- Lead
- 73,066
- Total
- 449,798
- vs nation
- R+14.8
Florida 21st Congressional District
President margin by year
Place winner margin
President results by year
Modeled candidate-vote estimate on current district boundaries
- Lead
- 38,973
- Total
- 440,809
- vs nation
- R+13.3
- Lead
- 36,404
- Total
- 371,590
- vs nation
- R+11.9
- Lead
- 15,664
- Total
- 333,350
- vs nation
- R+8.6
- Lead
- 4,705
- Total
- 326,651
- vs nation
- R+5.8
- Lead
- 8,347
- Total
- 289,819
- vs nation
- R+0.4
- Lead
- 4,402
- Total
- 232,256
- vs nation
- D+1.4
- Lead
- 2,955
- Total
- 213,873
- vs nation
- R+7.1
Key facts
- 2024 presidential margin
- R+16.2MIT Election Lab
- Population
- 769,2212024 5-year
- Population density
- 511 / sq mi2024 5-year · TIGER/Line
- Land area
- 1,506 sq miTIGER/Line
- Median household income
- $82,1542024 5-year
- White (non-Hispanic)
- 63.2%2024 5-year
- Black
- 12.8%2024 5-year
- Hispanic / Latino
- 17.4%2024 5-year
- Peak Democratic margin
- D+55.2 in 1912MIT Election Lab
- Peak Republican margin
- R+57.9 in 1972MIT Election Lab
- Most similar
- Congressional District 17, FL · twin score 87.1
presidential history
Party record book
Florida 21st Congressional District · the strongest Democratic and Republican presidential performances recorded here, measured three ways.
2000–2024 · 7 presidential cycles
Highest vote share
Largest share of the presidential candidate vote cast here.
Democratic
Barack Obama2008
50.2%
164,031 votes · D+1.4 · modeled estimate
Runner-up · Al Gore, 2000 · 49.7%
Republican
Donald Trump2024
57.8%
259,826 votes · R+16.2 · modeled estimate
Runner-up · Donald Trump, 2020 · 54.1%
Most votes
Largest number of votes cast for the party’s presidential nominee here.
Democratic
Joe Biden2020
199,398votes
45.2% of the vote · R+8.8 · modeled estimate
Runner-up · Kamala Harris, 2024 · 186,760 votes
Republican
Donald Trump2024
259,826votes
57.8% of the vote · R+16.2 · modeled estimate
Runner-up · Donald Trump, 2020 · 238,371 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
Al Gore2000
+1.4pts D vs U.S.
Place D+1.9 · U.S. D+0.5 · modeled estimate
Runner-up · John Kerry, 2004 · −0.4 pts
Republican
Donald Trump2024
+14.8pts R vs U.S.
Place R+16.2 · U.S. R+1.5 · modeled estimate
Runner-up · Donald Trump, 2020 · +13.3 pts
Current officeholders
Federal officeholders only. State and local officeholders are planned for the next data pass.
Senate and governor results are in the Office selector at the top of this page.
U.S. House
Each result reflects the U.S. House district as it was drawn for that election; redistricting has redrawn these lines over time, so they can differ from the current 120th-Congress district shown on the map above.
Florida's 21st congressional district, as drawn for the 2026 elections, takes in St. Lucie and Martin counties and parts of Palm Beach. About 769,200 people live within its 2026 boundaries, with a median age of 48.2. Measured on those boundaries, the district has voted Republican in every presidential election since 2012, by widening margins. The margin was R+4.7 in 2012, R+9.7 in 2016, R+8.8 in 2020, and R+16.2 in 2024.
Across the recorded series it reached a Democratic high of 55.2 points in 1912 and a Republican high of 57.9 points in 1972. Between 2020 and 2024 the district moved 7.4 points toward the Republican candidate; the 2024 margin was 16.2 points.
A population of 769,221, a 63% non-Hispanic-white share, and a median household income of $82,154 describe the district. The district's voting pattern over the last decade is most similar to that of Congressional District 17 and Congressional District 19.
The congressional 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 →
Florida 21st Congressional District. Akashic. https://akashic.app/cd/1221/. Accessed May 20, 2026. License: CC BY 4.0.