Data as of November 4, 2026 · refreshed automatically from the official California voter file
Orange County, CA has 1,912,548 active registered voters — 33.5% Republican, 36.5% Democratic, and 23.5% with no party affiliation, as of November 2026.
Party registration
Most reliable-voting precincts
| # | Precinct | Active voters | Supervoters | Supervoter % |
|---|---|---|---|---|
| 1 | 32813 | 1,510 | 1,104 | 73.11% |
| 2 | 49842 | 1,104 | 790 | 71.56% |
| 3 | 36003 | 637 | 442 | 69.39% |
| 4 | 36015 | 1,089 | 754 | 69.24% |
| 5 | 36008 | 1,503 | 1,013 | 67.4% |
| 6 | 36014 | 1,999 | 1,343 | 67.18% |
| 7 | 69834 | 1,569 | 1,048 | 66.79% |
| 8 | 25391 | 514 | 343 | 66.73% |
| 9 | 32306 | 1,970 | 1,313 | 66.65% |
| 10 | 53059 | 2,320 | 1,542 | 66.47% |
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 Orange County voted for president
Election results are public records.
Orange County at a glance.
Orange County had an estimated 3,170,435 residents in July 2024, the third most populous of California's 58 counties, down 0.5% since the 2020 census. Of those, 2,527,530 are 18 or older, the voting-age population, and 17.4% are 65 or older. Its 1,912,548 active registered voters equal about 75.7% of that voting-age population.
It covers 793 square miles of land (3,999 people per square mile), and 4.1% of residents live outside any incorporated city or town. The largest cities and towns are Anaheim (344,561), Irvine (318,683), Santa Ana (316,184), Huntington Beach (193,151) and Garden Grove (172,361). The American Community Survey (2020-2024) puts it at a median age of 39.4, a median household income of $116,289, 44.1% of adults 25 and older holding a bachelor's degree or higher and 56.4% of occupied homes owned by the people living in them.
In 2024, 1,390,965 votes were cast for president, about 55.0% of the voting-age population; the Democratic ticket took 49.7% and the Republican ticket 47.1%. The two-party margin moved from R+2.6 in 2008 to D+2.6 in 2024.
- Population (2024 estimate)
- 3,170,435
- Population (2020 census base)
- 3,187,256
- Voting-age population (18+)
- 2,527,530
- Active voters per 100 adults
- 75.7
- Residents 65 and older
- 17.4%
- People per square mile
- 3,999
- Living outside incorporated places
- 4.1%
- Land area
- 793 sq mi
- Median age
- 39.4
- Median household income
- $116,289
- Adults 25+ with a bachelor's degree
- 44.1%
- Owner-occupied homes
- 56.4%
Largest cities and towns
- Anaheim 344,561
- Irvine 318,683
- Santa Ana 316,184
- Huntington Beach 193,151
- Garden Grove 172,361
Presidential vote, 2008–2024
| Year | Democratic | Republican | Margin | Votes cast |
|---|---|---|---|---|
| 2024 | 49.7% | 47.1% | D+2.6 | 1,390,965 |
| 2020 | 53.5% | 44.5% | D+9.0 | 1,521,725 |
| 2016 | 51.0% | 43.3% | D+7.7 | 1,092,116 |
| 2012 | 44.8% | 53.0% | R+8.2 | 1,021,315 |
| 2008 | 47.6% | 50.2% | R+2.6 | 1,153,687 |
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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