Texas 21st State Senate District
Presidential margin, 2004–2024
Democratic minus Republican, by election
| Year | Margin (D minus R) |
|---|---|
| 2004 | +5.5% |
| 2008 | +22.9% |
| 2012 | +23.8% |
| 2016 | +24.6% |
| 2020 | +17.1% |
| 2024 | +3.2% |
| Year | Won | Democratic | Republican | Other | Margin | Swing | vs U.S. | Total |
|---|---|---|---|---|---|---|---|---|
| D | 50.9%Harris158,206 | 47.8%Trump148,361 | 1.3% | D+3.2 | R+14.0 | D+4.6 | 310,630 | |
| D | 58.0%Biden174,769 | 40.9%Trump123,154 | 1.1% | D+17.1 | R+7.4 | D+12.7 | 301,195 | |
| D | 59.7%Clinton135,754 | 35.2%Trump79,941 | 5.1% | D+24.6 | D+0.8 | D+22.5 | 227,286 | |
| D | 60.9%Obama117,279 | 37.1%Romney71,475 | 1.9% | D+23.8 | D+0.9 | D+19.9 | 192,464 | |
| D | 61.0%Obama117,498 | 38.0%McCain73,283 | 1.0% | D+22.9 | D+17.4 | D+15.7 | 192,760 | |
| D | 52.3%Kerry91,197 | 46.8%Bush81,584 | 0.9% | D+5.5 | — | D+8.0 | 174,401 |
Current officeholders
State legislative officeholder from OpenStates nightly current-legislator data.
Its 2024 presidential margin of D+3.2 ranked among Texas's closest, against D+22.9 in 2008. No racial group formed a majority of its residents in the 2024 ACS 5-year, with Hispanic or Latino residents at 61.3%.
Across the recorded series it reached a Democratic high of 24.6 points in 2016. Between 2020 and 2024 the district moved 14.0 points toward the Republican candidate; the 2024 margin was 3.2 points.
A population of 907,942, a 24% non-Hispanic-white share, and a median household income of $69,461 describe the district. The district's voting pattern over the last decade is most similar to that of State Senate District 19 and State Senate District 29.
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.
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 →
Texas 21st State Senate District. Akashic. https://akashic.app/sld-upper/48021/. Accessed May 20, 2026. License: CC BY 4.0.