Data as of October 18, 2026 · refreshed automatically from the official California voter file
Ventura County, CA has 525,115 active registered voters — 28.6% Republican, 42.6% Democratic, and 20.8% with no party affiliation, as of October 2026.
Party registration
Most reliable-voting precincts
| # | Precinct | Active voters | Supervoters | Supervoter % |
|---|---|---|---|---|
| 1 | 0006911 | 618 | 518 | 83.82% |
| 2 | 0006908 | 764 | 634 | 82.98% |
| 3 | 0092039 | 867 | 719 | 82.93% |
| 4 | 0006909 | 615 | 502 | 81.63% |
| 5 | 0006910 | 759 | 606 | 79.84% |
| 6 | 0055078 | 625 | 495 | 79.2% |
| 7 | 0055079 | 666 | 519 | 77.93% |
| 8 | 0097096 | 646 | 502 | 77.71% |
| 9 | 0007040 | 692 | 531 | 76.73% |
| 10 | 0084049 | 645 | 493 | 76.43% |
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 Ventura County voted for president
Election results are public records.
Ventura County at a glance.
Ventura County had an estimated 835,427 residents in July 2024, the 12th most populous of California's 58 counties, down 1.1% since the 2020 census. Of those, 659,010 are 18 or older, the voting-age population, and 18.6% are 65 or older. Its 525,115 active registered voters equal about 79.7% of that voting-age population.
It covers 1,841 square miles of land (454 people per square mile), and 11.0% of residents live outside any incorporated city or town. The largest cities and towns are Oxnard (200,616), Simi Valley (125,778), Thousand Oaks (124,229), San Buenaventura (Ventura) (109,831) and Camarillo (69,881). The American Community Survey (2020-2024) puts it at a median age of 39.6, a median household income of $109,797, 36.1% of adults 25 and older holding a bachelor's degree or higher and 64.6% of occupied homes owned by the people living in them.
In 2024, 387,595 votes were cast for president, about 58.8% of the voting-age population; the Democratic ticket took 56.1% and the Republican ticket 41.0%. The two-party margin moved from D+12.3 in 2008 to D+15.1 in 2024.
- Population (2024 estimate)
- 835,427
- Population (2020 census base)
- 844,363
- Voting-age population (18+)
- 659,010
- Active voters per 100 adults
- 79.7
- Residents 65 and older
- 18.6%
- People per square mile
- 454
- Living outside incorporated places
- 11.0%
- Land area
- 1,841 sq mi
- Median age
- 39.6
- Median household income
- $109,797
- Adults 25+ with a bachelor's degree
- 36.1%
- Owner-occupied homes
- 64.6%
Largest cities and towns
- Oxnard 200,616
- Simi Valley 125,778
- Thousand Oaks 124,229
- San Buenaventura (Ventura) 109,831
- Camarillo 69,881
Presidential vote, 2008–2024
| Year | Democratic | Republican | Margin | Votes cast |
|---|---|---|---|---|
| 2024 | 56.1% | 41.0% | D+15.1 | 387,595 |
| 2020 | 59.5% | 38.4% | D+21.1 | 422,698 |
| 2016 | 55.4% | 38.6% | D+16.8 | 307,881 |
| 2012 | 51.6% | 46.3% | D+5.3 | 267,907 |
| 2008 | 55.2% | 42.9% | D+12.3 | 339,800 |
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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