† Citizen voting-age population estimated for prior cycles; 2004 predates the ACS and is extrapolated. Source: ACS 5-year, table B05003.
——
D+60R+60
20042024
Boundary by 2024 margin · Precinct returns · VEST · 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
GroupMartinezCaliforniaUnited States
German13.2%6.8%12.5%
English13.2%6.3%9.5%
Irish12.1%5.9%9.4%
Italian7.8%3.4%4.8%
American3.6%2.8%5.3%
French2.5%1.3%1.6%
Scottish2.5%0.9%1.3%
Polish2.2%0.9%2.2%
Mexican13.2%32.3%11.3%
Salvadoran1.9%2.0%0.7%
Guatemalan0.8%1.3%0.5%
Nicaraguan0.7%0.3%—
Peruvian0.6%——
Puerto Rican0.5%0.6%1.8%
Spaniard0.5%0.3%—
Spanish0.4%0.3%—
Filipino2.7%3.3%0.9%
Chinese2.4%3.9%1.3%
Asian Indian2.1%2.3%1.4%
Korean0.5%1.2%0.4%
Vietnamese0.4%1.7%0.6%
Japanese0.3%0.6%0.2%
Pakistani0.2%——
Afghan0.2%——
African American†2.0%4.4%9.9%
Aztec1.2%0.3%—
Maya0.8%——
Samoan0.8%——
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
Martinez
California
United States
Median age
42.6
37.9
39.1
Age 18–24
7.2%
9.1%
9.2%
Age 65 and older
19.0%
15.6%
17.2%
Household economy
Measure
Martinez
California
United States
Median household income
$127,355
$99,122
$84,427
Poverty rate
6.3%
12.0%
12.5%
Bachelor's degree or higher (25+)
46.7%
36.6%
35.6%
Languages at home
Measure
Martinez
California
United States
Speaks a non-English language at home
17.4%
44.4%
22.3%
Spanish
9.0%
28.4%
13.6%
Other Indo-European
2.1%
3.4%
2.0%
Chinese (incl. Mandarin & Cantonese)
1.8%
3.5%
1.1%
Tagalog (incl. Filipino)
1.6%
2.1%
0.6%
Religious landscape
Measure
Martinez
California
United States
Catholic
—
26.2%
18.6%
Evangelical Protestant
—
9.0%
16.5%
Unclaimed / not counted
—
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.
Martinez, California
presidential history
Presidential margin, 2004–2024
Democratic minus Republican, by election
Presidential margin over time
Year
Margin (D minus R)
2004
+26.5%
2008
+38.9%
2012
+34.5%
2016
+38.1%
2020
+41.6%
2024
+36.9%
DemocraticRepublican
6 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. Third-party votes in 2012 are allocated from certified county totals by this place's share of each county's two-party vote — that cycle's precinct source records two-party splits. † 2004 sub-county results are estimated: the source's block-level detail for this cycle was unreliable — either county/municipality-level consolidated reporting (COVID-era) or a precinct-to-block allocation that misplaced votes — so the figures are allocated from the constituent county totals in proportion to the place and scaled to certified totals.
Year
Won
Democratic
Republican
Other
Margin
Swing
vs U.S.
Total
D
66.8%Harris13,656
29.9%Trump6,109
3.3%
D+36.9
R+4.7
D+38.4
20,450
D
69.5%Biden15,272
27.9%Trump6,138
2.6%
D+41.6
D+3.4
D+37.1
21,979
D
65.6%Clinton12,262
27.4%Trump5,128
7.0%
D+38.1
D+3.7
D+36.1
18,703
D
65.9%Obama11,451
31.4%Romney5,462
2.7%
D+34.5
R+4.4
D+30.6
17,380
D
69.3%Obama12,653
30.4%McCain5,557
0.3%
D+38.9
D+12.4
D+31.6
18,265
D
62.6%Kerry10,646
36.1%Bush6,141
1.3%
D+26.5
—
D+28.9
17,008
Martinez anchors the industrial waterfront of Contra Costa County, where a large Shell refinery complex has long shaped local labor politics and ballot priorities around environmental regulation and worker safety.
Across the recorded series it reached a Democratic high of 41.6 points in 2020. Between 2020 and 2024 the city moved 4.7 points toward the Republican candidate; the 2024 margin was 36.9 points.
A population of 36,903, a 59% non-Hispanic-white share, and a median household income of $127,355 describe the city. The city's voting pattern over the last decade is most similar to that of Pleasant Hill and Pacifica.
Akashic
Political twins — cities
The cities 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.
In 2024, Martinez, California voted Democratic by 36.9 points (D+36.9), carried by the Democratic candidate. Out of 20,450 votes cast, 13,656 went Democratic and 6,109 went Republican.
How many people live in Martinez, California?
Martinez, California has a population of 36,903 according to the 2024 American Community Survey 5-year estimates from the US Census Bureau.
What is the median household income in Martinez, California?
Median household income in Martinez, California is $127,355 — above the national median of $80,734. The California state median is $99,122.
What is the political history of Martinez, California?
Akashic tracks 6 presidential elections in Martinez, California from 2004 to 2024. Of those, 6 went Democratic and 0 went Republican.
