- Lead
- 13,849
- Total
- 32,601
- vs nation
- R+41.0
Pennsylvania 99th State House District
President margin by year
Place winner margin
President results by year
Modeled candidate-vote estimate on current district boundaries
- Lead
- 12,875
- Total
- 31,513
- vs nation
- R+45.3
- Lead
- 11,780
- Total
- 27,149
- vs nation
- R+45.5
- Lead
- 10,307
- Total
- 24,706
- vs nation
- R+45.6
- Lead
- 8,784
- Total
- 24,886
- vs nation
- R+42.6
- Lead
- 12,775
- Total
- 25,159
- vs nation
- R+48.3
- Lead
- 10,522
- Total
- 20,412
- vs nation
- R+52.1
- Lead
- 7,986
- Total
- 17,883
- vs nation
- R+53.2
Key facts
- 2024 presidential margin
- R+42.5MIT Election Lab
- Population
- 64,0402024 5-year
- Population density
- 374 / sq mi2024 5-year · TIGER/Line
- Land area
- 171 sq miTIGER/Line
- Median household income
- $98,8762024 5-year
- White (non-Hispanic)
- 90.6%2024 5-year
- Black
- 1.0%2024 5-year
- Hispanic / Latino
- 4.4%2024 5-year
- Peak Republican margin
- R+71.1 in 1928MIT Election Lab
- Most similar
- State House District 100, PA · twin score 96.5
presidential history
Party record book
Pennsylvania 99th 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
Lyndon B. Johnson1964
41.7%
5,099 votes · R+16.4 · modeled estimate
Runner-up · Franklin D. Roosevelt, 1936 · 38.6%
Republican
Herbert Hoover1928
83.4%
7,944 votes · R+71.1 · modeled estimate
Runner-up · Ronald Reagan, 1984 · 83.1%
Most votes
Largest number of votes cast for the party’s presidential nominee here.
Democratic
Kamala Harris2024
9,216votes
28.3% of the vote · R+42.5 · modeled estimate
Runner-up · Joe Biden, 2020 · 9,038 votes
Republican
Donald Trump2024
23,065votes
70.7% of the vote · R+42.5 · modeled estimate
Runner-up · Donald Trump, 2020 · 21,913 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
James M. Cox1920
−28.6pts D vs U.S.
Place R+54.8 · U.S. R+26.2 · modeled estimate
Runner-up · Woodrow Wilson, 1912 · −31.8 pts
Republican
Richard Nixon1960
+54.1pts R vs U.S.
Place R+53.9 · U.S. D+0.2 · modeled estimate
Runner-up · Herbert Hoover, 1928 · +53.6 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 |
|---|---|---|---|---|
| 2024 | R | 41.2%13,101 | 58.8%18,727 | 31,828 |
| 2020 | R | 41.6%11,461 | 58.4%16,118 | 27,579 |
Pennsylvania 99th State House District sits in the Mid-Atlantic. In 2024 it voted Republican.
Across the recorded series it reached a Republican high of 71.1 points in 1928. Between 2020 and 2024 the district moved 1.6 points toward the Republican candidate; the 2024 margin was 42.5 points.
A population of 64,040, a 91% non-Hispanic-white share, and a median household income of $98,876 describe the district. The district's voting pattern over the last decade is most similar to that of State House District 100 and State House District 85.
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 →
Pennsylvania 99th State House District. Akashic. https://akashic.app/sld-lower/42099/. Accessed May 20, 2026. License: CC BY 4.0.