Data as of August 27, 2026 · from the official Florida voter file
Florida Congressional District 21 has 541,765 active registered voters — 43.7% Republican, 28.3% Democratic, and 23.8% with no party affiliation, spread across 3 counties, as of August 2026.
Party registration
Counties in this district
| County | Voters in this district | Share of the district | Precincts |
|---|---|---|---|
| St. Lucie County | 239,114 | 44.1% | 63 |
| Palm Beach County | 188,434 | 34.8% | 216 |
| Martin County | 114,217 | 21.1% | 55 |
A precinct split between two districts is counted in both, each with its own share of the voters — which is what a split precinct is.
Most reliable-voting precincts in this district
| # | Precinct | County | Voters in this district | Supervoter rate |
|---|---|---|---|---|
| 1 | 02.3 | Martin County | 481 | 80.2% |
| 2 | 24.1 | Martin County | 4,072 | 78.9% |
| 3 | 23.2 | Martin County | 4,622 | 77.9% |
| 4 | 19.2 | Martin County | 2,044 | 77.8% |
| 5 | 27.1 | Martin County | 5,065 | 77.6% |
| 6 | 13.2 | Martin County | 3,525 | 77.1% |
| 7 | 02.1 | Martin County | 4,995 | 76.7% |
| 8 | 21.2 | Martin County | 4,994 | 76.6% |
| 9 | 17.1 | Martin County | 2,027 | 76.5% |
| 10 | 26.1 | Martin County | 5,305 | 76.0% |
Supervoters are active registered voters who cast a ballot in at least 3 of the last 4 November general elections (2018–2024). Percentages are precinct totals from the official state voter file — no individual voter information is shown. The rate describes the whole precinct, while the voter count is only this district's share of it — so the two columns are not a fraction of one another. Precincts with fewer than 400 of this district's voters are excluded.
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