† Citizen voting-age population estimated for prior cycles; 2004 predates the ACS and is extrapolated. Source: ACS 5-year, table B05003.
——
D+60R+60
1 counties by 2024 margin · County returns · MIT Election Lab
People and households
Who lives here
Exact values for this place, its state, and the United States.
Race · ethnicity · ancestry
Communities and origins
GroupSanta Rosa-Petaluma, CACaliforniaUnited States
German12.4%6.8%12.5%
Irish12.2%5.9%9.4%
English12.1%6.3%9.5%
Italian8.0%3.4%4.8%
French2.8%1.3%1.6%
Scottish2.7%0.9%1.3%
American2.5%2.8%5.3%
Polish1.8%0.9%2.2%
Mexican24.3%32.3%11.3%
Salvadoran1.0%2.0%0.7%
Spanish0.9%0.3%—
Spaniard0.6%0.3%—
Puerto Rican0.5%0.6%1.8%
Guatemalan0.4%1.3%0.5%
Colombian0.3%0.3%0.4%
Cuban0.2%—0.7%
Chinese0.9%3.9%1.3%
Filipino0.9%3.3%0.9%
Vietnamese0.7%1.7%0.6%
Asian Indian0.6%2.3%1.4%
Korean0.2%1.2%0.4%
Japanese0.2%0.6%0.2%
Cambodian0.2%——
Nepalese0.2%——
African American†0.9%4.4%9.9%
Aztec0.4%0.3%—
Fijian0.2%——
Hispanic or Latino counts residents of any race; the race groups count only their non-Hispanic residents, so the groups are mutually exclusive and sum to 100%. Expand a row to see ancestries reported within that group.
Age and life stage
Measure
Santa Rosa-Petaluma, CA
California
United States
Median age
42.9
37.9
39.1
Age 18–24
7.9%
9.1%
9.2%
Age 65 and older
21.6%
15.6%
17.2%
Household economy
Measure
Santa Rosa-Petaluma, CA
California
United States
Median household income
$104,674
$99,122
$84,427
Poverty rate
8.9%
12.0%
12.5%
Bachelor's degree or higher (25+)
38.5%
36.6%
35.6%
Languages at home
Measure
Santa Rosa-Petaluma, CA
California
United States
Speaks a non-English language at home
27.0%
44.4%
22.3%
Spanish
21.0%
28.4%
13.6%
Other Indo-European
1.4%
3.4%
2.0%
Religious landscape
Measure
Santa Rosa-Petaluma, CA
California
United States
Catholic
23.5%
26.2%
18.6%
Evangelical Protestant
5.3%
9.0%
16.5%
Unclaimed / not counted
63.8%
55.2%
51.5%
American Community Survey 2024 5-year (CVAP, income, age, poverty, education, language, race, ancestry) · presidential returns from MIT Election Lab through 2024 · 2020 U.S. Religion Census (ASARB) — congregational adherents; unclaimed is the residual not counted by congregations.
Santa Rosa-Petaluma, CA
presidential history
Presidential margin, 1892–2024
Democratic minus Republican, by election
Presidential margin over time
Year
Margin (D minus R)
1892
+6.3%
1896
−5.9%
1900
−10.7%
1904
−28.7%
1908
−23.9%
1912
+45.8%
1916
−7.0%
1920
−40.7%
1924
−45.6%
1928
−20.3%
1932
+25.4%
1936
+21.2%
1940
−4.9%
1944
−1.1%
1948
−15.1%
1952
−33.0%
1956
−24.0%
1960
−8.6%
1964
+23.1%
1968
−5.8%
1972
−13.2%
1976
−0.2%
1980
−12.0%
1984
−3.4%
1988
+14.6%
1992
+28.7%
1996
+26.0%
2000
+27.3%
2004
+36.3%
2008
+49.6%
2012
+45.7%
2016
+46.7%
2020
+51.5%
2024
+46.2%
DemocraticRepublican
34 presidential elections
Third column names the leading third-party or independent finisher. Source · MIT Election Lab · ICPSR · VEST (precinct-level 2024). Swing · margin change from the prior cycle. vs U.S. · margin relative to the national result that year.
Year
Won
Democratic
Republican
Other
Margin
Swing
vs U.S.
Total
D
71.4%Harris179,600
25.2%Trump63,426
1.5%Kennedy3,844 +4
D+46.2
R+5.3
D+47.7
251,426
All 7 candidates in 2024 · 5 minor / independent
Kamala D HarrisDemocratic71.4%179,600
Donald J TrumpRepublican25.2%63,426
Robert F Kennedy Jr.Independent1.5%3,844
Jill SteinIndependent0.9%2,348
Chase OliverLibertarian0.4%1,124
Claudia De La CruzIndependent0.4%1,062
OtherAll other candidates0.0%22
D
74.5%Biden199,938
23.0%Trump61,825
2.4%
D+51.5
D+4.7
D+47.0
268,317
D
68.8%Clinton160,435
22.0%Trump51,408
9.2%
D+46.7
D+1.0
D+44.6
233,303
D
71.0%Obama153,942
25.3%Romney54,784
3.8%
D+45.7
R+3.9
D+41.9
216,865
D
73.6%Obama168,888
24.0%McCain55,127
2.3%
D+49.6
D+13.3
D+42.3
229,351
D
67.2%Kerry148,261
30.9%Bush68,204
1.9%
D+36.3
D+9.0
D+38.7
220,690
D
59.5%Gore117,295
32.2%Bush63,529
8.2%
D+27.3
D+1.3
D+26.8
197,006
D
55.6%Clinton100,738
29.5%Dole53,555
14.9%
D+26.0
R+2.7
D+17.5
181,297
D
52.8%Clinton104,334
24.1%Bush47,619
23.1%
D+28.7
D+14.1
D+23.1
197,691
D
56.5%Dukakis91,262
41.9%Bush67,725
1.6%
D+14.6
D+18.0
D+22.3
161,583
R
47.6%Mondale71,295
51.1%Reagan76,447
1.3%
R+3.4
D+8.6
D+14.8
149,657
R
36.2%Carter45,596
48.2%Reagan60,722
15.6%
R+12.0
R+11.8
R+2.3
125,985
R
47.5%Carter50,353
47.7%Ford50,555
4.8%
R+0.2
D+13.0
R+2.3
105,952
R
41.5%McGovern43,746
54.7%Nixon57,697
3.8%
R+13.2
R+7.5
D+9.9
105,434
R
43.0%Humphrey33,587
48.8%Nixon38,088
8.2%
R+5.8
R+28.9
R+5.1
78,059
D
61.5%Johnson44,354
38.4%Goldwater27,677
0.1%
D+23.1
D+31.7
D+0.5
72,136
R
45.5%Kennedy29,147
54.1%Nixon34,641
0.4%
R+8.6
D+15.4
R+8.7
64,032
R
37.9%Stevenson20,616
61.9%Eisenhower33,659
0.2%
R+24.0
D+9.0
R+8.6
54,361
R
33.0%Stevenson17,046
65.9%Eisenhower34,088
1.1%
R+33.0
R+17.8
R+22.2
51,717
R
40.1%Truman16,026
55.2%Dewey22,077
4.7%
R+15.1
R+14.0
R+19.6
39,984
R
49.3%Roosevelt15,949
50.4%Dewey16,309
0.3%
R+1.1
D+3.8
R+8.6
32,369
R
47.0%Roosevelt15,230
51.9%Willkie16,819
1.0%
R+4.9
R+26.1
R+14.9
32,379
D
60.2%Roosevelt17,273
39.0%Landon11,185
0.9%
D+21.2
R+4.2
R+3.1
28,706
D
61.1%Roosevelt15,686
35.7%Hoover9,161
3.2%
D+25.4
D+45.7
D+7.6
25,669
R
39.4%Smith8,506
59.7%Hoover12,891
0.9%
R+20.3
D+25.3
R+2.8
21,591
R
10.4%Davis1,767
56.0%Coolidge9,535
33.6%
R+45.6
R+5.0
R+20.4
17,028
R
26.2%Cox4,070
66.9%Harding10,377
6.9%
R+40.7
R+33.6
R+14.5
15,512
R
43.4%Wilson8,377
50.4%Hughes9,733
6.3%
R+7.0
R+52.8
R+10.2
19,324
O
45.8%Wilson6,500
0.0%Taft0
54.2%
Roosevelt +8.4
D+69.7
D+26.2
14,199
R
33.6%Bryan3,168
57.5%Taft5,427
8.9%
R+23.9
D+4.8
R+14.4
9,439
R
32.9%Parker2,816
61.6%Roosevelt5,269
5.4%
R+28.7
R+18.0
R+9.0
8,548
R
43.4%Bryan3,517
54.0%McKinley4,381
2.6%
R+10.7
R+4.8
R+3.1
8,107
R
46.0%Bryan3,595
51.9%McKinley4,053
2.1%
R+5.9
R+12.1
D+0.2
7,816
D
49.7%Cleveland3,451
43.4%Harrison3,016
6.9%
D+6.3
—
D+4.6
6,950
Congressional elections · 3 Senate races
U.S. Senate
Source · MIT Election Lab (MEDSL), Senate. CC-BY 4.0.
Year
Won
Democratic
Republican
Total
2024
D
72.0%176,477
28.0%68,712
245,189
2022
D
73.4%143,197
26.6%51,982
195,179
2018
D
100.0%193,692
0.0%0
193,692
voter registration
Registered voters
By party of registration, over time
Party registration · 2024D+38.4
vs
Presidential vote · 2024D+46.2
Registration leans Democratic; the presidential vote runs 7.8 points more Republican.
304,906 registered voters · 2024 · up from 302,544 in 2022
Domestic migration in Santa Rosa-Petaluma, CA in Santa Rosa-Petaluma, CA: net domestic migration by year
Year
Net domestic migration
2011
+1,139
2012
+1,321
2013
+2,555
2014
+2,864
2015
+686
2016
+130
2017
−1,061
2018
−4,202
2019
−4,534
2021
−3,893
2022
−2,579
2023
−1,628
2024
−349
2025
+514
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.
Across the recorded series it reached a Democratic high of 51.5 points in 2020 and a Republican high of 45.6 points in 1924. Between 2020 and 2024 the metro moved 5.3 points toward the Republican candidate; the 2024 margin was 46.2 points.
A population of 485,040, a 58% non-Hispanic-white share, and a median household income of $104,674 describe the metro. The metro's voting pattern over the last decade is most similar to that of Santa Cruz-Watsonville, CA and Napa, CA.
Akashic
Political twins — metros
The metros whose fingerprint — 2000–2024 trajectory, demographics, ancestry, religion — sits closest to this one, and why.
Twin score (0–100) = weighted cosine between tier-standardized fingerprints: presidential margins 2000–2024 with 12-yr trend and elasticity, ACS income, age, education, population and race, top reported ancestries, and religious adherence — chips name the closest-shared dimensions and the widest gap. Re-weight the groups in the twins explorer.
Compare two places, side by side
Twelve curated comparisons line up election history, demographics, and the divergence story for two places at a glance. Browse all comparisons →
Cite this page
All citations released under CC BY 4.0. Attribution: Akashic Intelligence.
Santa Rosa-Petaluma, CA, California. Akashic. https://akashic.app/cbsa/42220/. Accessed May 20, 2026. License: CC BY 4.0.
License: CC BY 4.0
Embed this page
A live widget for your site — no API key, attribution built in, CC BY 4.0. All widgets & sizes →
How did Santa Rosa-Petaluma, CA, California vote in 2024?
In 2024, Santa Rosa-Petaluma, CA, California voted Democratic by 46.2 points (D+46.2), carried by the Democratic candidate. Out of 251,426 votes cast, 179,600 went Democratic and 63,426 went Republican.
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 34 presidential elections in Santa Rosa-Petaluma, CA, California from 1892 to 2024. Of those, 14 went Democratic and 19 went Republican.
