Data as of November 4, 2026 · refreshed automatically from the official Florida voter file
Seminole County, Florida has 341,432 active registered voters — 35.6% Republican, 31.6% Democratic, and 28.8% with no party affiliation, as of November 2026.
Party registration
Most reliable-voting precincts
| # | Precinct | Active voters | Supervoters | Supervoter % |
|---|---|---|---|---|
| 1 | * | 1,751 | 1,051 | 60.02% |
| 2 | 050 | 5,629 | 3,308 | 58.77% |
| 3 | 036 | 2,026 | 1,149 | 56.71% |
| 4 | 031 | 3,691 | 2,088 | 56.57% |
| 5 | 033 | 4,674 | 2,550 | 54.56% |
| 6 | 019 | 4,795 | 2,603 | 54.29% |
| 7 | 055 | 3,506 | 1,876 | 53.51% |
| 8 | 049 | 4,895 | 2,566 | 52.42% |
| 9 | 032 | 4,094 | 2,131 | 52.05% |
| 10 | 034 | 4,217 | 2,179 | 51.67% |
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. Precincts with fewer than 400 active voters are excluded.
How Seminole County voted for president
Election results are public records.
Seminole County at a glance.
Seminole County had an estimated 494,605 residents in July 2024, the 13th most populous of Florida's 67 counties, up 5.0% since the 2020 census. Of those, 395,236 are 18 or older, the voting-age population, and 17.3% are 65 or older. Its 341,432 active registered voters equal about 86.4% of that voting-age population.
It covers 309 square miles of land (1,599 people per square mile), and 47.1% of residents live outside any incorporated city or town. The largest cities and towns are Sanford (66,919), Altamonte Springs (47,261), Oviedo (41,901), Winter Springs (39,822) and Casselberry (31,650). The American Community Survey (2020-2024) puts it at a median age of 39.8, a median household income of $85,761, 42.7% of adults 25 and older holding a bachelor's degree or higher and 66.2% of occupied homes owned by the people living in them.
In 2024, 253,720 votes were cast for president, about 64.2% of the voting-age population; the Democratic ticket took 47.6% and the Republican ticket 51.1%. The two-party margin moved from R+2.8 in 2008 to R+3.5 in 2024.
- Population (2024 estimate)
- 494,605
- Population (2020 census base)
- 470,852
- Voting-age population (18+)
- 395,236
- Active voters per 100 adults
- 86.4
- Residents 65 and older
- 17.3%
- People per square mile
- 1,599
- Living outside incorporated places
- 47.1%
- Land area
- 309 sq mi
- Median age
- 39.8
- Median household income
- $85,761
- Adults 25+ with a bachelor's degree
- 42.7%
- Owner-occupied homes
- 66.2%
Largest cities and towns
- Sanford 66,919
- Altamonte Springs 47,261
- Oviedo 41,901
- Winter Springs 39,822
- Casselberry 31,650
Presidential vote, 2008–2024
| Year | Democratic | Republican | Margin | Votes cast |
|---|---|---|---|---|
| 2024 | 47.6% | 51.1% | R+3.5 | 253,720 |
| 2020 | 50.8% | 48.0% | D+2.8 | 260,815 |
| 2016 | 47.1% | 48.7% | R+1.6 | 224,377 |
| 2012 | 46.2% | 52.7% | R+6.5 | 208,605 |
| 2008 | 48.2% | 51.0% | R+2.8 | 205,895 |
Sources: U.S. Census Bureau Vintage 2024 population estimates and 2024 Gazetteer; American Community Survey 2020–2024 5-year estimates; certified county presidential returns. Growth, density and turnout are simple arithmetic on those figures.
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