- Lead
- 25,630
- Total
- 43,211
- vs nation
- D+60.8
Louisiana 15th State Senate District
President margin by year
Place winner margin
President results by year
Modeled candidate-vote estimate on current district boundaries
- Lead
- 31,263
- Total
- 52,844
- vs nation
- D+54.7
- Lead
- 28,646
- Total
- 49,266
- vs nation
- D+56.1
- Lead
- 27,733
- Total
- 49,039
- vs nation
- D+52.7
- Lead
- 26,166
- Total
- 48,139
- vs nation
- D+47.1
- Lead
- 19,256
- Total
- 42,218
- vs nation
- D+48.1
- Lead
- 18,397
- Total
- 38,921
- vs nation
- D+46.7
- Lead
- 22,175
- Total
- 41,359
- vs nation
- D+45.1
Key facts
- 2024 presidential margin
- D+59.3MIT Election Lab
- Population
- 115,8482024 5-year
- Population density
- 938 / sq mi2024 5-year · TIGER/Line
- Land area
- 124 sq miTIGER/Line
- Median household income
- $48,8992024 5-year
- White (non-Hispanic)
- 15.1%2024 5-year
- Black
- 74.0%2024 5-year
- Hispanic / Latino
- 6.3%2024 5-year
- Peak Democratic margin
- D+99.5 in 1904MIT Election Lab
- Most similar
- State Senate District 30, TN · twin score 97.4
presidential history
Party record book
Louisiana 15th 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
Alton B. Parker1904
99.7%
382 votes · D+99.5 · modeled estimate
Runner-up · William J. Bryan, 1908 · 99.3%
Republican
Richard Nixon1972
38.7%
6,021 votes · D+18.0 · modeled estimate
Runner-up · Ronald Reagan, 1984 · 33.9%
Most votes
Largest number of votes cast for the party’s presidential nominee here.
Democratic
Joe Biden2020
41,620votes
78.8% of the vote · D+59.2 · modeled estimate
Runner-up · Hillary Clinton, 2016 · 38,305 votes
Republican
George W. Bush2004
11,398votes
27.0% of the vote · D+45.6 · modeled estimate
Runner-up · Ronald Reagan, 1984 · 10,888 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
+120.4pts D vs U.S.
Place D+94.2 · U.S. R+26.2 · modeled estimate
Runner-up · Alton B. Parker, 1904 · +119.1 pts
Republican
Barry Goldwater1964
−17.9pts R vs U.S.
Place D+40.4 · U.S. D+22.6 · modeled estimate
Runner-up · Richard Nixon, 1968 · −36.3 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 | R | 46.0%17,184 | 54.0%20,200 | 37,384 |
| 2018 | R | 48.2%18,026 | 51.8%19,358 | 37,384 |
Louisiana 15th State Senate District sits in the Gulf South. In 2024 it voted Democratic.
Across the recorded series it reached a Democratic high of 99.5 points in 1904. The 2024 margin was 59.3 points.
A population of 115,848, a 15% non-Hispanic-white share, and a median household income of $48,899 describe the district. The district's voting pattern over the last decade is most similar to that of State Senate District 30 and State Senate District 15.
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 15th State Senate District. Akashic. https://akashic.app/sld-upper/22015/. Accessed May 20, 2026. License: CC BY 4.0.