- Lead
- 7,795
- Total
- 24,250
- vs nation
- R+30.7
Louisiana 66th State House District
President margin by year
Place winner margin
President results by year
Modeled candidate-vote estimate on current district boundaries
- Lead
- 8,562
- Total
- 20,945
- vs nation
- R+45.3
- Lead
- 8,825
- Total
- 19,597
- vs nation
- R+47.1
- Lead
- 10,082
- Total
- 20,179
- vs nation
- R+53.8
- Lead
- 10,706
- Total
- 20,476
- vs nation
- R+59.6
- Lead
- 12,301
- Total
- 20,248
- vs nation
- R+58.3
- Lead
- 10,817
- Total
- 18,432
- vs nation
- R+59.2
- Lead
- 8,635
- Total
- 17,579
- vs nation
- R+57.6
Key facts
- 2024 presidential margin
- R+32.1MIT Election Lab
- Population
- 43,7032024 5-year
- Population density
- 1,056 / sq mi2024 5-year · TIGER/Line
- Land area
- 41.4 sq miTIGER/Line
- Median household income
- $110,1632024 5-year
- White (non-Hispanic)
- 66.3%2024 5-year
- Black
- 19.2%2024 5-year
- Hispanic / Latino
- 5.9%2024 5-year
- Peak Democratic margin
- D+57.4 in 1904MIT Election Lab
- Peak Republican margin
- R+76.0 in 1876MIT Election Lab
- Most similar
- State House District 65, LA · twin score 97.1
presidential history
Party record book
Louisiana 66th State House 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
78.7%
37 votes · D+57.4 · modeled estimate
Runner-up · Franklin D. Roosevelt, 1936 · 70.1%
Republican
Rutherford B. Hayes1876
88.0%
264 votes · R+76.0 · modeled estimate
Runner-up · Benjamin Harrison, 1888 · 86.2%
Most votes
Largest number of votes cast for the party’s presidential nominee here.
Democratic
Kamala Harris2024
7,962votes
32.8% of the vote · R+32.1 · modeled estimate
Runner-up · Joe Biden, 2020 · 5,972 votes
Republican
George W. Bush2004
16,204votes
80.0% of the vote · R+60.8 · modeled estimate
Runner-up · Donald Trump, 2024 · 15,757 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
+77.1pts D vs U.S.
Place D+57.4 · U.S. R+19.7 · modeled estimate
Runner-up · William J. Bryan, 1908 · +50.5 pts
Republican
Barry Goldwater1964
+88.5pts R vs U.S.
Place R+65.9 · U.S. D+22.6 · modeled estimate
Runner-up · John McCain, 2008 · +59.6 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%6,483 | 54.0%7,620 | 14,103 |
| 2018 | R | 48.2%6,800 | 51.8%7,303 | 14,103 |
Louisiana House District 66 has delivered lopsided Republican presidential margins, reflecting the broader rightward shift of non-urban Louisiana constituencies over the past two decades. With roughly 43,700 residents, the district sits well below the statewide competitiveness threshold.
Across the recorded series it reached a Democratic high of 57.4 points in 1904 and a Republican high of 76.0 points in 1876. Between 2020 and 2024 the district moved 8.7 points toward the Democratic candidate; the 2024 margin was 32.1 points.
A population of 43,703, a 66% non-Hispanic-white share, and a median household income of $110,163 describe the district. The district's voting pattern over the last decade is most similar to that of State House District 65 and State House District 69.
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 →
Louisiana 66th State House District. Akashic. https://akashic.app/sld-lower/22066/. Accessed May 20, 2026. License: CC BY 4.0.