Louisiana 21st State Senate District, Louisiana: Realigner district. In 2024, voted R+38%. Democratic peak: D+68 in 1944.
Key facts
- 2024 presidential margin
- R+38MIT Election Lab
- Political archetype
- RealignerAkashic typology
- Population
- 132,5802024 5-year
- Median household income
- $56,7182024 5-year
- White (non-Hispanic)
- 60.3%2024 5-year
- Black
- 26.6%2024 5-year
- Hispanic / Latino
- 7.2%2024 5-year
- Peak Democratic margin
- D+68 in 1944MIT Election Lab
- Peak Republican margin
- R+39 in 1972MIT Election Lab
Constituent county margins for State Senate District 21, LAOne cell per constituent county, colored by 2024 presidential margin from deep red (Republican) through neutral to deep blue (Democratic), ordered bluest first.
R+60D+60
One cell per constituent county. Ordered by 2024 D-vs-R margin (bluest first). Hover for county-level numbers.
38 presidential elections
| Year | Won | Margin | Democratic | Republican | Total |
|---|---|---|---|---|---|
| R | 17,450 | 39,631 | 57,719 | ||
| R | 20,146 | 42,771 | 63,805 | ||
| R | 19,853 | 40,731 | 62,105 | ||
| R | 22,991 | 38,844 | 62,706 | ||
| R | 22,910 | 37,045 | 61,063 | ||
| R | 24,489 | 34,650 | 59,958 | ||
| R | 24,413 | 29,819 | 56,073 | ||
| D | 30,922 | 20,286 | 56,799 | ||
| D | 26,102 | 21,243 | 57,546 | ||
| R | 24,926 | 27,675 | 53,869 | ||
| R | 21,239 | 35,153 | 57,397 | ||
| R | 22,404 | 25,186 | 49,508 | ||
| D | 21,300 | 19,829 | 42,089 | ||
| R | 9,879 | 23,857 | 35,607 | ||
| O | 11,000 | 9,505 | 36,159 | ||
| R | 12,815 | 16,288 | 29,103 | ||
| D | 16,412 | 6,050 | 25,487 | ||
| R | 5,867 | 9,777 | 16,113 | ||
| R | 8,653 | 8,999 | 17,651 | ||
| O | 2,008 | 2,798 | 9,413 | ||
| D | 7,613 | 1,454 | 9,067 | ||
| D | 8,135 | 2,179 | 10,314 | ||
| D | 4,675 | 1,792 | 6,467 | ||
| D | 4,896 | 1,101 | 5,997 | ||
| D | 4,319 | 1,075 | 5,394 | ||
| R | 1,380 | 1,397 | 2,808 | ||
| R | 1,048 | 2,028 | 3,075 | ||
| D | 1,673 | 373 | 3,502 | ||
| D | 1,389 | 369 | 2,393 | ||
| D | 1,749 | 631 | 2,439 | ||
| D | 1,737 | 410 | 2,162 | ||
| D | 1,931 | 1,333 | 3,264 | ||
| D | 1,542 | 1,400 | 3,002 | ||
| D | 2,757 | 814 | 3,571 | ||
| — | — | — | — | ||
| — | — | — | — | ||
| — | — | — | — | ||
| — | — | — | — |
Demographics
Race, ethnicity, and ancestry
Click any group to see the ancestries typically reported within it.
French
16.0%
American
6.4%
German
5.1%
English
4.5%
Irish
4.0%
Italian
2.8%
Source · American Community Survey 5-year estimates, 2024 release. Hispanic/Latino is an ethnicity that overlaps the race categories, so these shares can total more than 100%. Ancestry is a self-reported, multiple-response item; ancestry percentages do not sum to the parent race percentage.
Age distribution by sex
Median age: 39.3 in this county, 39.1 nationally
Male
Age
Female
85+
75–84
65–74
55–64
45–54
35–44
25–34
18–24
5–17
<5
Source · American Community Survey 5-year estimates, 2024 release.
Median household income
2024 inflation-adjusted dollars
$56,718
State Senate District 21 ranks near the middle of US counties.
State Senate District 21$56,718
Louisiana$60,756
United States$80,734
Source · American Community Survey 5-year estimates, 2024 release.
Poverty rate
All persons below federal poverty line
19.1%
Children face higher poverty than working-age adults.
Children under 1825.1%
Working age (18–64)17.0%
Seniors (65+)18.7%
Source · American Community Survey 5-year estimates, 2024 release.
Language at home
Population aged 5 and older
90.6%
speak English only
Spanish4.5%
Other Indo-European3.6%
Asian & Pacific Islander1.1%
Other languages0.2%
Source · ACS 5-year estimates, 2024.
Religious adherents
Adherents per capita by tradition
Source · 2020 US Religion Census. Remaining 36.7% of residents not counted as adherents by any reporting body.
With a 2024 presidential margin of R+72.5, this district ranks among the most heavily one-sided in the state, reflecting a rural, deeply conservative electorate where statewide and legislative contests rarely remain competitive.
The unraveling was not abrupt. The Democratic margin in Louisiana 21st State Senate District peaked at sixty-eight points in 1944; it narrowed steadily over the late twentieth century. The 2000 election delivered the district to the Republican party for the first time in many years, by a margin of ten points. By 2024, the margin had settled into deep Republican territory.
The economic and demographic context is severe. The median household income of $56,718 is among the lowest at this geographic scale; 19% of residents live below the federal poverty line.
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 →
Cite this page
All citations released under CC BY 4.0. Attribution: Akashic Intelligence.
State Senate District 21, Louisiana. Akashic. https://akashic.app/sld-upper/22021/. Accessed May 20, 2026. License: CC BY 4.0.
License: CC BY 4.0
Frequently asked questions
How did State Senate District 21, Louisiana vote in 2024?
In 2024, State Senate District 21, Louisiana voted Republican by 38.4 points (R+38), carried by the Republican candidate. Out of 57,719 votes cast, 17,450 went Democratic and 39,631 went Republican.
What is State Senate District 21, Louisiana's political archetype?
Akashic classifies State Senate District 21, Louisiana as a "Realigner" district based on its long-arc presidential voting pattern. Across 38 elections in the dataset, the district has voted Democratic 16 times, Republican 16 times, and other 2 times.
When did State Senate District 21, Louisiana last vote Democratic?
The most recent presidential election in which State Senate District 21, Louisiana voted Democratic was 1996.
How many people live in State Senate District 21, Louisiana?
State Senate District 21, Louisiana has a population of 132,580 according to the 2024 American Community Survey 5-year estimates from the US Census Bureau.
What is the median household income in State Senate District 21, Louisiana?
Median household income in State Senate District 21, Louisiana is $56,718 — below the national median of $80,734. The Louisiana state median is $60,756.
What is the political history of State Senate District 21, Louisiana?
Akashic tracks 38 presidential elections in State Senate District 21, Louisiana from 1876 to 2024. Of those, 16 went Democratic and 16 went Republican. The district's archetype — "Realigner" — captures the overall trajectory of that voting record.