- Lead
- 36,457
- Total
- 85,032
- vs nation
- D+44.3
Arizona 20th State House District
President margin by year
Place winner margin
President results by year
Modeled candidate-vote estimate on current district boundaries
- Lead
- 46,684
- Total
- 92,318
- vs nation
- D+46.1
- Lead
- 36,237
- Total
- 73,896
- vs nation
- D+46.9
- Lead
- 30,245
- Total
- 64,924
- vs nation
- D+42.7
- Lead
- 30,715
- Total
- 66,701
- vs nation
- D+38.8
- Lead
- 28,581
- Total
- 62,147
- vs nation
- D+48.4
- Lead
- 22,104
- Total
- 49,906
- vs nation
- D+43.8
- Lead
- 21,989
- Total
- 46,649
- vs nation
- D+38.6
Key facts
- 2024 presidential margin
- D+42.9MIT Election Lab
- Population
- 238,4862024 5-year
- Population density
- 2,751 / sq mi2024 5-year · TIGER/Line
- Land area
- 86.7 sq miTIGER/Line
- Median household income
- $47,2492024 5-year
- White (non-Hispanic)
- 33.9%2024 5-year
- Black
- 3.3%2024 5-year
- Hispanic / Latino
- 53.4%2024 5-year
- Peak Democratic margin
- D+74.2 in 1936MIT Election Lab
- Most similar
- State House District 26, AZ · twin score 93.2
presidential history
Party record book
Arizona 20th State House 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
86.7%
2,895 votes · D+74.2 · modeled estimate
Runner-up · Franklin D. Roosevelt, 1932 · 84.7%
Republican
Dwight D. Eisenhower1956
41.4%
3,907 votes · D+17.2 · modeled estimate
Runner-up · Dwight D. Eisenhower, 1952 · 36.9%
Most votes
Largest number of votes cast for the party’s presidential nominee here.
Democratic
Joe Biden2020
68,802votes
74.5% of the vote · D+50.6 · modeled estimate
Runner-up · Kamala Harris, 2024 · 59,799 votes
Republican
Donald Trump2024
23,342votes
27.5% of the vote · D+42.9 · modeled estimate
Runner-up · Donald Trump, 2020 · 22,118 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
James M. Cox1920
+70.6pts D vs U.S.
Place D+44.4 · U.S. R+26.2 · modeled estimate
Runner-up · Al Smith, 1928 · +61.3 pts
Republican
Barry Goldwater1964
−23.8pts R vs U.S.
Place D+46.4 · U.S. D+22.6 · modeled estimate
Runner-up · Ronald Reagan, 1980 · −29.5 pts
Current officeholders
State legislative officeholder from OpenStates nightly current-legislator data.
Senate and governor results are in the Office selector at the top of this page.
U.S. House
Each row is a county-allocated estimate of U.S. House votes for this district — county returns apportioned onto its boundary, not precinct-counted. “Vote lead” is the estimated local lead here, not necessarily the winner of the full contest.
| Year | Vote lead | Democratic | Republican | Total |
|---|---|---|---|---|
| 2020 | D | 60.8%25,232 | 39.2%16,255 | 41,487 |
With a 2024 presidential margin of D+42.9, this Maricopa County district ranks among the most heavily Democratic state house seats in Arizona, reflecting a dense, diverse urban core that consistently delivers lopsided margins.
Across the recorded series it reached a Democratic high of 74.2 points in 1936. Between 2020 and 2024 the district moved 7.7 points toward the Republican candidate; the 2024 margin was 42.9 points.
A population of 238,486, a 34% non-Hispanic-white share, and a median household income of $47,249 describe the district. The district's voting pattern over the last decade is most similar to that of State House District 26 and State House District 11.
The state-house 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.
District research tools
Open the source-auditable district brief for electoral baseline, electorate, current-cycle coverage, geography, official dates, and methodology. Open campaign intelligence report → · Browse all comparisons →
Arizona 20th State House District. Akashic. https://akashic.app/sld-lower/04020/. Accessed May 20, 2026. License: CC BY 4.0.