- Lead
- 16,698
- Total
- 53,626
- vs nation
- R+29.7
Alabama 21st State Senate District
President margin by year
Place winner margin
President results by year
Modeled candidate-vote estimate on current district boundaries
- Lead
- 14,707
- Total
- 57,146
- vs nation
- R+30.2
- Lead
- 16,449
- Total
- 53,207
- vs nation
- R+33.0
- Lead
- 14,333
- Total
- 51,601
- vs nation
- R+31.6
- Lead
- 14,010
- Total
- 51,986
- vs nation
- R+34.2
- Lead
- 15,583
- Total
- 46,715
- vs nation
- R+30.9
- Lead
- 9,927
- Total
- 40,661
- vs nation
- R+24.9
- Lead
- 6,091
- Total
- 36,706
- vs nation
- R+25.1
Key facts
- 2024 presidential margin
- R+31.1MIT Election Lab
- Population
- 143,8892024 5-year
- Population density
- 107 / sq mi2024 5-year · TIGER/Line
- Land area
- 1,342 sq miTIGER/Line
- Median household income
- $63,8502024 5-year
- White (non-Hispanic)
- 65.3%2024 5-year
- Black
- 22.5%2024 5-year
- Hispanic / Latino
- 6.9%2024 5-year
- Peak Democratic margin
- D+85.8 in 1936MIT Election Lab
- Peak Republican margin
- R+54.9 in 1964MIT Election Lab
- Most similar
- State Senate District 27, AL · twin score 94.9
presidential history
Party record book
Alabama 21st State Senate District · the strongest Democratic and Republican presidential performances recorded here, measured three ways.
1892–2024 (partial returns from 1876) · 38 presidential cycles · 38 with a vote-share denominator · 34 with a national benchmark
Highest vote share
Largest share of the presidential candidate vote cast here.
Democratic
Franklin D. Roosevelt1936
92.5%
4,234 votes · D+85.8 · modeled estimate
Runner-up · Franklin D. Roosevelt, 1940 · 91.3%
Republican
Barry Goldwater1964
77.4%
11,389 votes · R+54.9 · modeled estimate
Runner-up · Richard Nixon, 1972 · 73.6%
Most votes
Largest number of votes cast for the party’s presidential nominee here.
Democratic
Joe Biden2020
20,789votes
36.4% of the vote · R+25.7 · modeled estimate
Runner-up · Barack Obama, 2008 · 18,745 votes
Republican
Donald Trump2020
35,496votes
62.1% of the vote · R+25.7 · modeled estimate
Runner-up · Donald Trump, 2024 · 34,803 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
+97.4pts D vs U.S.
Place D+72.3 · U.S. R+25.2 · modeled estimate
Runner-up · James M. Cox, 1920 · +93.3 pts
Republican
Barry Goldwater1964
+77.5pts R vs U.S.
Place R+54.9 · U.S. D+22.6 · modeled estimate
Runner-up · John McCain, 2008 · +34.2 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.
District 21 recorded a 31.1-point Republican presidential margin in 2024, placing it among the most heavily one-sided state senate districts in Alabama. Turnout patterns and local candidate performance often track closely with statewide Republican nominees.
Across the recorded series it reached a Democratic high of 85.8 points in 1936 and a Republican high of 54.9 points in 1964. Between 2020 and 2024 the district moved 5.4 points toward the Republican candidate; the 2024 margin was 31.1 points.
A population of 143,889, a 65% non-Hispanic-white share, and a median household income of $63,850 describe the district. The district's voting pattern over the last decade is most similar to that of State Senate District 27 and State Senate District 8.
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.
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 →
Alabama 21st State Senate District. Akashic. https://akashic.app/sld-upper/01021/. Accessed May 20, 2026. License: CC BY 4.0.