- Lead
- 9,611
- Total
- 129,996
- vs nation
- R+5.9
New Jersey 40th State Senate District
President margin by year
Place winner margin
President results by year
Modeled candidate-vote estimate on current district boundaries
- Lead
- 1,936
- Total
- 138,594
- vs nation
- R+3.1
- Lead
- 6,296
- Total
- 117,206
- vs nation
- R+7.5
- Lead
- 4,400
- Total
- 109,016
- vs nation
- R+7.9
- Lead
- 11,036
- Total
- 116,560
- vs nation
- R+16.7
- Lead
- 22,260
- Total
- 113,065
- vs nation
- R+17.2
- Lead
- 11,624
- Total
- 100,345
- vs nation
- R+12.1
- Lead
- 9,667
- Total
- 98,428
- vs nation
- R+18.3
Key facts
- 2024 presidential margin
- R+7.4MIT Election Lab
- Population
- 230,4282024 5-year
- Population density
- 2,667 / sq mi2024 5-year · TIGER/Line
- Land area
- 86.4 sq miTIGER/Line
- Median household income
- $147,4022024 5-year
- White (non-Hispanic)
- 73.2%2024 5-year
- Black
- 2.6%2024 5-year
- Hispanic / Latino
- 13.2%2024 5-year
- Peak Democratic margin
- D+1.4 in 2020MIT Election Lab
- Peak Republican margin
- R+77.0 in 1920MIT Election Lab
- Most similar
- State Senate District 25, NJ · twin score 95.2
presidential history
Party record book
New Jersey 40th 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
Joe Biden2020
49.9%
69,214 votes · D+1.4 · modeled estimate
Runner-up · Barack Obama, 2012 · 47.6%
Republican
Warren G. Harding1920
86.4%
52,392 votes · R+77.0 · modeled estimate
Runner-up · William McKinley, 1896 · 81.8%
Most votes
Largest number of votes cast for the party’s presidential nominee here.
Democratic
Joe Biden2020
69,214votes
49.9% of the vote · D+1.4 · modeled estimate
Runner-up · Kamala Harris, 2024 · 58,501 votes
Republican
Dwight D. Eisenhower1956
124,023votes
81.1% of the vote · R+63.5 · modeled estimate
Runner-up · Dwight D. Eisenhower, 1952 · 112,047 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
Joe Biden2020
−3.1pts D vs U.S.
Place D+1.4 · U.S. D+4.5 · modeled estimate
Runner-up · Kamala Harris, 2024 · −5.9 pts
Republican
Herbert Hoover1932
+63.6pts R vs U.S.
Place R+45.8 · U.S. D+17.8 · modeled estimate
Runner-up · Charles E. Hughes, 1916 · +63.6 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 |
|---|---|---|---|---|
| 2020 | D | 66.1%58,811 | 33.9%30,186 | 88,997 |
| 2018 | D | 69.4%36,912 | 30.6%16,281 | 53,193 |
New Jersey's 40th Senate district stretches along the northern Shore and into suburban Morris County terrain, where a 7.4-point Republican presidential margin in 2024 reflects a broader rightward trend among the area's mix of coastal and commuter communities.
Across the recorded series it reached a Democratic high of 1.4 points in 2020 and a Republican high of 77.0 points in 1920. Between 2020 and 2024 the district moved 8.8 points toward the Republican candidate; the 2024 margin was 7.4 points.
A population of 230,428, a 73% non-Hispanic-white share, and a median household income of $147,402 describe the district. The district's voting pattern over the last decade is most similar to that of State Senate District 25 and State Senate District 39.
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 →
New Jersey 40th State Senate District. Akashic. https://akashic.app/sld-upper/34040/. Accessed May 20, 2026. License: CC BY 4.0.