Data as of October 18, 2026 · refreshed automatically from the official California voter file
Monterey County, CA has 220,527 active registered voters — 20.7% Republican, 49.8% Democratic, and 22.7% with no party affiliation, as of October 2026.
Party registration
Most reliable-voting precincts
| # | Precinct | Active voters | Supervoters | Supervoter % |
|---|---|---|---|---|
| 1 | 5UC0152 | 765 | 615 | 80.39% |
| 2 | 5CS0021 | 1,088 | 821 | 75.46% |
| 3 | 5P60072 | 530 | 393 | 74.15% |
| 4 | 5Y29201 | 756 | 560 | 74.07% |
| 5 | 5UC0151 | 613 | 452 | 73.74% |
| 6 | 5UC0161 | 434 | 320 | 73.73% |
| 7 | 5UC0182 | 480 | 353 | 73.54% |
| 8 | 5UC0112 | 1,103 | 805 | 72.98% |
| 9 | 5Y30302 | 509 | 370 | 72.69% |
| 10 | 5Y30291 | 1,279 | 926 | 72.4% |
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 Monterey County voted for president
Election results are public records.
Monterey County at a glance.
Monterey County had an estimated 436,251 residents in July 2024, the 21st most populous of California's 58 counties, down 1.1% since the 2020 census. Of those, 326,450 are 18 or older, the voting-age population, and 15.8% are 65 or older. Its 220,527 active registered voters equal about 67.6% of that voting-age population.
It covers 3,282 square miles of land (133 people per square mile), and 23.4% of residents live outside any incorporated city or town. The largest cities and towns are Salinas (160,783), Seaside (31,524), Monterey (29,015), Soledad (26,345) and Marina (23,047). The American Community Survey (2020-2024) puts it at a median age of 35.5, a median household income of $97,230, 28.2% of adults 25 and older holding a bachelor's degree or higher and 52.1% of occupied homes owned by the people living in them.
In 2024, 146,718 votes were cast for president, about 44.9% of the voting-age population; the Democratic ticket took 63.4% and the Republican ticket 33.6%. The two-party margin moved from D+38.3 in 2008 to D+29.8 in 2024.
- Population (2024 estimate)
- 436,251
- Population (2020 census base)
- 441,012
- Voting-age population (18+)
- 326,450
- Active voters per 100 adults
- 67.6
- Residents 65 and older
- 15.8%
- People per square mile
- 133
- Living outside incorporated places
- 23.4%
- Land area
- 3,282 sq mi
- Median age
- 35.5
- Median household income
- $97,230
- Adults 25+ with a bachelor's degree
- 28.2%
- Owner-occupied homes
- 52.1%
Largest cities and towns
- Salinas 160,783
- Seaside 31,524
- Monterey 29,015
- Soledad 26,345
- Marina 23,047
Presidential vote, 2008–2024
| Year | Democratic | Republican | Margin | Votes cast |
|---|---|---|---|---|
| 2024 | 63.4% | 33.6% | D+29.8 | 146,718 |
| 2020 | 69.5% | 28.3% | D+41.2 | 163,883 |
| 2016 | 67.0% | 27.3% | D+39.7 | 96,676 |
| 2012 | 65.9% | 31.9% | D+34.0 | 78,522 |
| 2008 | 68.2% | 29.9% | D+38.3 | 129,783 |
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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