- Lead
- 9,360
- Total
- 133,879
- vs nation
- D+8.5
Pennsylvania 45th State Senate District
President margin by year
Place winner margin
President results by year
Modeled candidate-vote estimate on current district boundaries
- Lead
- 10,055
- Total
- 136,517
- vs nation
- D+2.9
- Lead
- 5,028
- Total
- 125,211
- vs nation
- D+1.9
- Lead
- 2,089
- Total
- 119,773
- vs nation
- R+2.1
- Lead
- 3,090
- Total
- 125,060
- vs nation
- R+4.8
- Lead
- 2,519
- Total
- 124,195
- vs nation
- D+4.5
- Lead
- 4,072
- Total
- 111,775
- vs nation
- D+3.1
- Lead
- 3,130
- Total
- 101,980
- vs nation
- R+5.5
Key facts
- 2024 presidential margin
- D+7.0MIT Election Lab
- Population
- 249,1802024 5-year
- Population density
- 1,534 / sq mi2024 5-year · TIGER/Line
- Land area
- 162 sq miTIGER/Line
- Median household income
- $63,4202024 5-year
- White (non-Hispanic)
- 74.0%2024 5-year
- Black
- 15.3%2024 5-year
- Hispanic / Latino
- 2.2%2024 5-year
- Peak Democratic margin
- D+22.3 in 1936MIT Election Lab
- Peak Republican margin
- R+67.7 in 1904MIT Election Lab
- Most similar
- State Senate District 38, PA · twin score 88.2
presidential history
Party record book
Pennsylvania 45th State Senate 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
60.0%
81,258 votes · D+20.3 · modeled estimate
Runner-up · Franklin D. Roosevelt, 1936 · 59.7%
Republican
Theodore Roosevelt1904
82.2%
20,076 votes · R+67.7 · modeled estimate
Runner-up · William McKinley, 1896 · 77.3%
Most votes
Largest number of votes cast for the party’s presidential nominee here.
Democratic
Lyndon B. Johnson1964
81,258votes
60.0% of the vote · D+20.3 · modeled estimate
Runner-up · John F. Kennedy, 1960 · 73,258 votes
Republican
Dwight D. Eisenhower1956
85,797votes
61.3% of the vote · R+22.7 · modeled estimate
Runner-up · Richard Nixon, 1972 · 82,742 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
Walter Mondale1984
+18.3pts D vs U.S.
Place D+0.1 · U.S. R+18.2 · modeled estimate
Runner-up · Michael Dukakis, 1988 · +15.3 pts
Republican
William McKinley1896
+50.0pts R vs U.S.
Place R+56.1 · U.S. R+6.1 · modeled estimate
Runner-up · Theodore Roosevelt, 1904 · +48.1 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 | D | 58.9%83,391 | 41.1%58,197 | 141,588 |
Pennsylvania 45th State Senate District sits in the Mid-Atlantic. In 2024 it voted Democratic.
Across the recorded series it reached a Democratic high of 22.3 points in 1936 and a Republican high of 67.7 points in 1904. The 2024 margin was 7.0 points.
A population of 249,180, a 74% non-Hispanic-white share, and a median household income of $63,420 describe the district. The district's voting pattern over the last decade is most similar to that of State Senate District 38 and State Senate District 42.
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.
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 45th State Senate District. Akashic. https://akashic.app/sld-upper/42045/. Accessed May 20, 2026. License: CC BY 4.0.