Pennsylvania 21st State Senate District
Akashic| Donald Trump ✓Republican | 71.1% | 100,023 |
|---|---|---|
| Kamala HarrisDemocratic | 28.1% | 39,591 |
| Jill SteinGreen | 0.8% | 1,131 |
County-level results (6 counties) — table
| County | Winner | Margin |
|---|---|---|
| Butler County, PA | Republican | R+32.1 |
| Clarion County, PA | Republican | R+52.9 |
| Erie County, PA | Republican | R+1.0 |
| Forest County, PA | Republican | R+44.3 |
| Venango County, PA | Republican | R+42.0 |
| Warren County, PA | Republican | R+39.1 |
| Year | Won | Democratic | Republican | Other | Margin | Total |
|---|---|---|---|---|---|---|
| R | 28.1%Harris39,591 | 71.1%Trump100,023 | 0.8%Stein1,131 | 140,745 | ||
| R | 28.4%Biden39,257 | 70.2%Trump96,991 | 1.4%Jorgensen1,918 | 138,166 | ||
| R | 26.9%Clinton33,201 | 68.8%Trump84,761 | 4.3%Johnson5,322 | 123,284 | ||
| R | 35.4%Obama40,117 | 64.6%Romney73,244 | 0.0% | 113,361 | ||
| R | 39.4%Obama48,188 | 58.6%McCain71,752 | 2.0%Nader2,411 | 122,351 |
| Year | Margin (D minus R) |
|---|---|
| 2008 | −19.3% |
| 2012 | −29.2% |
| 2016 | −41.8% |
| 2020 | −41.8% |
| 2024 | −42.9% |
State legislative officeholder from OpenStates nightly current-legislator data.
Stretching across rural south-central Pennsylvania, this district delivered a nearly 40-point Republican presidential margin in 2024, reflecting the demographic and economic profile common to small-town and agricultural communities in the region.
Across the recorded series it reached a Republican high of 42.9 points in 2024. Between 2020 and 2024 the district moved 1.2 points toward the Republican candidate; the 2024 margin was 42.9 points.
A population of 258,828, a 93% non-Hispanic-white share, and a median household income of $65,242 describe the district. The district's voting pattern over the last decade is most similar to that of State Senate District 41 and State Senate District 27.
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 →
Pennsylvania 21st State Senate District. Akashic. https://akashic.app/sld-upper/42021/. Accessed May 20, 2026. License: CC BY 4.0.