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Florida's 21st Congressional District
The current officeholder, the 2024 result, and a precinct-level model you can run yourself — built from how Florida actually voted.
Model Florida's 21st Congressional District →
Current officeholder
Brian J. Mast Republican
2024 result
Republican R+23.6
2024 votes cast
449,401
Office
U.S. House
Who lives in this district
This district is home to about 791,702 people, median age 48.2, median household income $79,967.
Population
791,702
Median age
48.2
Median household income
$79,967
Bachelor's degree or higher
35.2%
Race & ethnicity: White 63.2% · Black 13% · Hispanic 18.1% · Asian 2.1%
Source: U.S. Census Bureau, 2019–2023 American Community Survey (5-year).
Precinct results — 2024 general
304 precincts reported in Florida's 21st Congressional District's 2024 general election. The twenty largest:
| Precinct | Winner | Margin | Votes |
|---|---|---|---|
| 12111-129 | Republican | R+15.1 | 8,961 |
| 12111-83 | Republican | R+4.2 | 7,700 |
| 12111-123 | Republican | R+17.2 | 7,053 |
| 12111-115 | Democratic | D+0.0 | 6,678 |
| 12111-134 | Democratic | D+1.2 | 6,469 |
| 12085-2 | Republican | R+38.6 | 5,705 |
| 12111-105 | Republican | R+4.2 | 5,474 |
| 12085-1 | Republican | R+39.7 | 5,247 |
| 12111-60 | Republican | R+3.4 | 5,184 |
| 12085-12 | Republican | R+37.5 | 5,140 |
| 12111-89 | Republican | R+21.7 | 5,080 |
| 12085-22 | Republican | R+38.6 | 5,060 |
| 12085-7 | Republican | R+27.1 | 5,042 |
| 12085-21 | Republican | R+50.3 | 4,980 |
| 12085-25 | Republican | R+45.9 | 4,941 |
| 12111-117 | Republican | R+13.4 | 4,832 |
| 12111-107 | Republican | R+11.8 | 4,805 |
| 12085-18 | Republican | R+44.4 | 4,793 |
| 12085-26 | Republican | R+44.6 | 4,747 |
| 12085-27 | Republican | R+48.2 | 4,620 |
All 304 precincts are modelable — open the race in the simulator and drill to precinct grain.
Find your district
Enter a ZIP code or a district (e.g. NC-4) to find your U.S. House district and who represents it.
Model Florida's 21st Congressional District in five steps
- Set the candidates. Name the contenders for the Florida's 21st Congressional District (or keep the generic Democrat / Republican defaults). The map starts from the canonical mixed-grain 2024 presidential baseline.
- Apply a swing. Move vote share statewide, or by demographic cohort, with a slider. The map and the running tally recompute instantly.
- Model turnout. Mobilize or depress turnout for any group — turnout and persuasion are modeled separately, the way a real campaign thinks about them.
- Explore local geography. Zoom from the state through counties to the finest supported reporting grain and adjust the places available in the model.
- Roll up & share. Roll the result up to chamber control, then share the exact versioned scenario.
Open Florida's 21st Congressional District in the simulator →