- Lead
- 20
- Total
- 46,947
- vs nation
- D+1.4
Texas 40th State House District
President margin by year
Place winner margin
President results by year
Modeled candidate-vote estimate on current district boundaries
- Lead
- 9,583
- Total
- 45,406
- vs nation
- D+16.6
- Lead
- 15,558
- Total
- 34,584
- vs nation
- D+42.9
- Lead
- 13,044
- Total
- 27,257
- vs nation
- D+44.0
- Lead
- 11,482
- Total
- 25,529
- vs nation
- D+37.7
- Lead
- 4,197
- Total
- 21,185
- vs nation
- D+22.3
- Lead
- 6,155
- Total
- 18,982
- vs nation
- D+31.9
- Lead
- 7,325
- Total
- 16,207
- vs nation
- D+36.7
Key facts
- 2024 presidential margin
- R+0.04MIT Election Lab
- Population
- 185,4552024 5-year
- Population density
- 797 / sq mi2024 5-year · TIGER/Line
- Land area
- 233 sq miTIGER/Line
- Median household income
- $53,5142024 5-year
- White (non-Hispanic)
- 4.7%2024 5-year
- Black
- 0.7%2024 5-year
- Hispanic / Latino
- 92.7%2024 5-year
- Peak Democratic margin
- D+100.0 in 1880MIT Election Lab
- Peak Republican margin
- R+15.7 in 1952MIT Election Lab
- Most similar
- State House District 39, TX · twin score 99.9
presidential history
Party record book
Texas 40th 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
Grover Cleveland1884
100.0%
62 votes · D+100.0 · modeled estimate
Runner-up · Winfield S. Hancock, 1880 · 100.0%
Republican
Dwight D. Eisenhower1952
57.9%
2,525 votes · R+15.7 · modeled estimate
Runner-up · Dwight D. Eisenhower, 1956 · 52.6%
Most votes
Largest number of votes cast for the party’s presidential nominee here.
Democratic
Joe Biden2020
27,292votes
60.1% of the vote · D+21.1 · modeled estimate
Runner-up · Hillary Clinton, 2016 · 24,386 votes
Republican
Donald Trump2024
23,270votes
49.6% of the vote · R+0.04 · modeled estimate
Runner-up · Donald Trump, 2020 · 17,709 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
+105.5pts D vs U.S.
Place D+85.9 · U.S. R+19.7 · modeled estimate
Runner-up · William J. Bryan, 1908 · +97.8 pts
Republican
Dwight D. Eisenhower1952
+5.0pts R vs U.S.
Place R+15.7 · U.S. R+10.8 · modeled estimate
Runner-up · Donald Trump, 2024 · −1.4 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.
Texas House District 40, anchored in the Rio Grande Valley, recorded a zero-point presidential margin in 2024 — a striking shift in a region that once delivered lopsided Democratic margins and now draws serious attention from both parties.
Across the recorded series it reached a Democratic high of 100.0 points in 1880 and a Republican high of 15.7 points in 1952. Between 2020 and 2024 the district moved 21.1 points toward the Republican candidate; the 2024 margin was 0.0 points.
A population of 185,455, a 5% non-Hispanic-white share, and a median household income of $53,514 describe the district. The district's voting pattern over the last decade is most similar to that of State House District 39 and State House District 35.
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 →
Texas 40th State House District. Akashic. https://akashic.app/sld-lower/48040/. Accessed May 20, 2026. License: CC BY 4.0.