Arizona 12th State Senate District · the strongest Democratic and Republican presidential performances recorded here, measured three ways.
1912–2024 · 29 presidential cycles
Highest vote share
Largest share of the presidential candidate vote cast here.
Democratic
Franklin D. Roosevelt1936
73.1%
2,791 votes · D+51.4 · modeled estimate
Runner-up · Franklin D. Roosevelt, 1932 · 71.4%
Republican
Ronald Reagan1984
65.2%
24,333 votes · R+31.9 · modeled estimate
Runner-up · Richard Nixon, 1972 · 61.9%
Most votes
Largest number of votes cast for the party’s presidential nominee here.
Democratic
Joe Biden2020
80,152votes
58.5% of the vote · D+18.7 · modeled estimate
Runner-up · Kamala Harris, 2024 · 72,957 votes
Republican
Donald Trump2020
54,466votes
39.7% of the vote · D+18.7 · modeled estimate
Runner-up · Donald Trump, 2024 · 52,741 votes
Best relative to the U.S.
This Place’s margin against the national margin in the same election — positive when it leaned toward the party more than the country did.
Democratic
John W. Davis1924
+42.5pts D vs U.S.
Place D+17.3 · U.S. R+25.2 · modeled estimate
Runner-up · James M. Cox, 1920 · +40.3 pts
Republican
Ronald Reagan1980
+18.6pts R vs U.S.
Place R+28.3 · U.S. R+9.7 · modeled estimate
Runner-up · Barry Goldwater, 1964 · +15.8 pts
current representation
Current officeholders
DMitzi EpsteinState Senate · 12
State legislative officeholder from OpenStates nightly current-legislator data.
Arizona 12th State Senate District sits in the desert Southwest. In 2024 it voted Democratic.
Across the recorded series it reached a Democratic high of 51.4 points in 1936 and a Republican high of 31.9 points in 1984. Between 2020 and 2024 the district moved 2.9 points toward the Republican candidate; the 2024 margin was 15.8 points.
A population of 238,923, a 59% non-Hispanic-white share, and a median household income of $103,398 describe the district. The district's voting pattern over the last decade is most similar to that of State Senate District 38 and State Senate District 13.
Akashic
Political twins — state-senate districts
The state-senate districts 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 → · Or open the source-auditable district brief for electoral baseline, electorate, current-cycle coverage, geography, official dates, and methodology. Open campaign intelligence report →
Cite this page
All citations released under CC BY 4.0. Attribution: Akashic Intelligence.
Arizona 12th State Senate District. Akashic. https://akashic.app/sld-upper/04012/. Accessed May 20, 2026. License: CC BY 4.0.
How did Arizona 12th State Senate District vote in 2024?
In 2024, Arizona 12th State Senate District voted Democratic by 15.8 points (D+15.8), carried by the Democratic candidate. Out of 127,786 votes cast, 72,957 went Democratic and 52,741 went Republican.
When did Arizona 12th State Senate District last vote Republican?
The most recent presidential election in which Arizona 12th State Senate District voted Republican was 1988.
How many people live in Arizona 12th State Senate District?
Arizona 12th State Senate District has a population of 238,923 according to the 2024 American Community Survey 5-year estimates from the US Census Bureau.
What is the median household income in Arizona 12th State Senate District?
Median household income in Arizona 12th State Senate District is $103,398 — above the national median of $80,734. The Arizona state median is $79,964.
What is the political history of Arizona 12th State Senate District?
Akashic tracks 38 presidential elections in Arizona 12th State Senate District from 1876 to 2024. Of those, 19 went Democratic and 10 went Republican.