Santa Rosa-Petaluma, CA, California: Realigner metro. In 2024, voted D+46%. Democratic peak: D+51 in 2020.
Key facts
- 2024 presidential margin
- D+46MIT Election Lab
- Political archetype
- RealignerAkashic typology
- Population
- 485,0402024 5-year
- Median household income
- $104,6742024 5-year
- White (non-Hispanic)
- 61.8%2024 5-year
- Black
- 1.6%2024 5-year
- Hispanic / Latino
- 30.0%2024 5-year
- Peak Democratic margin
- D+51 in 2020MIT Election Lab
- Peak Republican margin
- R+46 in 1924MIT Election Lab
Constituent county margins for Santa Rosa-Petaluma, CA, CAOne cell per constituent county, colored by 2024 presidential margin from deep red (Republican) through neutral to deep blue (Democratic), ordered bluest first.
R+60D+60
One cell per constituent county. Ordered by 2024 D-vs-R margin (bluest first). Hover for county-level numbers.
38 presidential elections
| Year | Won | Margin | Democratic | Republican | Total |
|---|---|---|---|---|---|
| D | 179,600 | 63,426 | 251,465 | ||
| D | 199,938 | 61,825 | 268,317 | ||
| D | 160,435 | 51,408 | 233,303 | ||
| D | 153,942 | 54,784 | 216,865 | ||
| D | 168,888 | 55,127 | 229,351 | ||
| D | 148,261 | 68,204 | 220,690 | ||
| D | 117,295 | 63,529 | 197,006 | ||
| D | 100,738 | 53,555 | 181,297 | ||
| D | 104,334 | 47,619 | 197,691 | ||
| D | 91,262 | 67,725 | 161,583 | ||
| R | 71,295 | 76,447 | 149,657 | ||
| R | 45,596 | 60,722 | 125,985 | ||
| R | 50,353 | 50,555 | 105,952 | ||
| R | 43,746 | 57,697 | 105,434 | ||
| R | 33,587 | 38,088 | 78,059 | ||
| D | 44,354 | 27,677 | 72,136 | ||
| R | 29,147 | 34,641 | 64,032 | ||
| R | 20,616 | 33,659 | 54,361 | ||
| R | 17,046 | 34,088 | 51,717 | ||
| R | 16,026 | 22,077 | 39,984 | ||
| R | 15,949 | 16,309 | 32,369 | ||
| R | 15,230 | 16,819 | 32,379 | ||
| D | 17,273 | 11,185 | 28,706 | ||
| D | 15,686 | 9,161 | 25,669 | ||
| R | 8,506 | 12,891 | 21,591 | ||
| R | 1,767 | 9,535 | 17,028 | ||
| R | 4,070 | 10,377 | 15,512 | ||
| R | 8,377 | 9,733 | 19,324 | ||
| O | 6,500 | 0 | 14,199 | ||
| R | 3,168 | 5,427 | 9,439 | ||
| R | 2,816 | 5,269 | 8,548 | ||
| R | 3,517 | 4,381 | 8,107 | ||
| R | 3,595 | 4,053 | 7,816 | ||
| D | 3,451 | 3,016 | 6,950 | ||
| D | 3,394 | 3,293 | 7,011 | ||
| R | 2,944 | 3,044 | 6,160 | ||
| D | 2,628 | 2,290 | 5,040 | ||
| D | 2,907 | 2,432 | 5,345 |
Demographics
Race, ethnicity, and ancestry
Click any group to see the ancestries typically reported within it.
German
12.4%
Irish
12.2%
English
12.1%
Italian
8.0%
French
2.8%
Scottish
2.7%
American
2.5%
Source · American Community Survey 5-year estimates, 2024 release. Hispanic/Latino is an ethnicity that overlaps the race categories, so these shares can total more than 100%. Ancestry is a self-reported, multiple-response item; ancestry percentages do not sum to the parent race percentage.
Age distribution by sex
Median age: 42.9 in this county, 39.1 nationally
Male
Age
Female
85+
75–84
65–74
55–64
45–54
35–44
25–34
18–24
5–17
<5
Source · American Community Survey 5-year estimates, 2024 release.
Median household income
2024 inflation-adjusted dollars
$104,674
Santa Rosa-Petaluma, CA ranks near the middle of US counties.
Santa Rosa-Petaluma, CA$104,674
California$99,122
United States$80,734
Source · American Community Survey 5-year estimates, 2024 release.
Poverty rate
All persons below federal poverty line
8.9%
Child poverty is below the national average.
Children under 189.6%
Working age (18–64)8.5%
Seniors (65+)10.4%
Source · American Community Survey 5-year estimates, 2024 release.
Language at home
Population aged 5 and older
73.0%
speak English only
Spanish21.0%
Asian & Pacific Islander2.7%
Other Indo-European2.6%
Other languages0.6%
Source · ACS 5-year estimates, 2024.
Religious adherents
Adherents per capita by tradition
Source · 2020 US Religion Census. Remaining 63.5% of residents not counted as adherents by any reporting body.
Sonoma County's blend of agricultural roots and Bay Area commuter spillover has steadily shifted its voter composition, with registration margins narrowing in some precincts even as the area trends reliably blue at the countywide level.
The unraveling was not abrupt. The Democratic margin in Santa Rosa-Petaluma, CA peaked at fifty-one points in 2020; it narrowed steadily over the late twentieth century. The 1988 election delivered the metro to the Republican party for the first time in many years, by a margin of fifteen points. By 2024, the margin had widened further.
The economic and demographic context is severe. The median household income of $104,674 is among the lowest at this geographic scale; 9% of residents live below the federal poverty line.
Cite this page
All citations released under CC BY 4.0. Attribution: Akashic Intelligence.
Santa Rosa-Petaluma, CA, California — The Long Memory. Akashic Intelligence — The Long Memory. https://tiers.akashic.app/cbsa/42220/. Accessed May 20, 2026. License: CC BY 4.0.
License: CC BY 4.0
Frequently asked questions
How did Santa Rosa-Petaluma, CA, California vote in 2024?
In 2024, Santa Rosa-Petaluma, CA, California voted Democratic by 46.2 points (D+46), carried by the Democratic candidate. Out of 251,465 votes cast, 179,600 went Democratic and 63,426 went Republican.
What is Santa Rosa-Petaluma, CA, California's political archetype?
Akashic classifies Santa Rosa-Petaluma, CA, California as a "Realigner" metro based on its long-arc presidential voting pattern. Across 38 elections in the dataset, the metro has voted Democratic 17 times, Republican 20 times, and other 1 times.
When did Santa Rosa-Petaluma, CA, California last vote Republican?
The most recent presidential election in which Santa Rosa-Petaluma, CA, California voted Republican was 1984.
How many people live in Santa Rosa-Petaluma, CA, California?
Santa Rosa-Petaluma, CA, California has a population of 485,040 according to the 2024 American Community Survey 5-year estimates from the US Census Bureau.
What is the median household income in Santa Rosa-Petaluma, CA, California?
Median household income in Santa Rosa-Petaluma, CA, California is $104,674 — above the national median of $80,734. The California state median is $99,122.
What is the political history of Santa Rosa-Petaluma, CA, California?
Akashic tracks 38 presidential elections in Santa Rosa-Petaluma, CA, California from 1876 to 2024. Of those, 17 went Democratic and 20 went Republican. The metro's archetype — "Realigner" — captures the overall trajectory of that voting record.