- Lead
- 20,789
- Total
- 50,029
- vs nation
- R+40.1
Louisiana 21st State Senate District
President margin by year
Place winner margin
President results by year
Modeled candidate-vote estimate on current district boundaries
- Lead
- 21,806
- Total
- 56,398
- vs nation
- R+43.1
- Lead
- 19,888
- Total
- 53,662
- vs nation
- R+39.2
- Lead
- 15,334
- Total
- 53,861
- vs nation
- R+32.3
- Lead
- 14,009
- Total
- 52,351
- vs nation
- R+34.0
- Lead
- 10,478
- Total
- 51,373
- vs nation
- R+17.9
- Lead
- 5,800
- Total
- 48,035
- vs nation
- R+12.6
- Lead
- 8,094
- Total
- 48,462
- vs nation
- D+8.2
Key facts
- 2024 presidential margin
- R+41.6MIT Election Lab
- Population
- 118,1052024 5-year
- Population density
- 76 / sq mi2024 5-year · TIGER/Line
- Land area
- 1,548 sq miTIGER/Line
- Median household income
- $60,2492024 5-year
- White (non-Hispanic)
- 60.0%2024 5-year
- Black
- 26.3%2024 5-year
- Hispanic / Latino
- 7.0%2024 5-year
- Peak Democratic margin
- D+66.2 in 1944MIT Election Lab
- Peak Republican margin
- R+49.3 in 1880MIT Election Lab
- Most similar
- State Senate District 22, LA · twin score 96.4
presidential history
Party record book
Louisiana 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. Roosevelt1944
83.1%
6,580 votes · D+66.2 · modeled estimate
Runner-up · Franklin D. Roosevelt, 1932 · 80.0%
Republican
James A. Garfield1880
74.7%
4,055 votes · R+49.3 · modeled estimate
Runner-up · Donald Trump, 2024 · 70.3%
Most votes
Largest number of votes cast for the party’s presidential nominee here.
Democratic
Bill Clinton1996
25,904votes
53.5% of the vote · D+16.7 · modeled estimate
Runner-up · Bill Clinton, 1992 · 21,387 votes
Republican
Donald Trump2020
38,708votes
68.6% of the vote · R+38.7 · modeled estimate
Runner-up · Donald Trump, 2016 · 36,135 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
Alton B. Parker1904
+74.5pts D vs U.S.
Place D+54.9 · U.S. R+19.7 · modeled estimate
Runner-up · Al Smith, 1928 · +71.9 pts
Republican
Donald Trump2020
+43.1pts R vs U.S.
Place R+38.7 · U.S. D+4.5 · modeled estimate
Runner-up · Donald Trump, 2024 · +40.1 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 |
|---|---|---|---|---|
| 2018 | R | 30.5%11,291 | 69.5%25,681 | 36,972 |
Louisiana 21st State Senate District sits in the Gulf South. In 2024 it voted Republican.
Across the recorded series it reached a Democratic high of 66.2 points in 1944 and a Republican high of 49.3 points in 1880. Between 2020 and 2024 the district moved 2.9 points toward the Republican candidate; the 2024 margin was 41.6 points.
A population of 118,105, a 60% non-Hispanic-white share, and a median household income of $60,249 describe the district. The district's voting pattern over the last decade is most similar to that of State Senate District 22 and State Senate District 28.
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 →
Louisiana 21st State Senate District. Akashic. https://akashic.app/sld-upper/22021/. Accessed May 20, 2026. License: CC BY 4.0.