- Lead
- 30,492
- Total
- 119,487
- vs nation
- R+24.0
New Jersey 12th State Senate District
President margin by year
Place winner margin
President results by year
Modeled candidate-vote estimate on current district boundaries
- Lead
- 17,708
- Total
- 125,532
- vs nation
- R+18.6
- Lead
- 18,742
- Total
- 105,507
- vs nation
- R+19.9
- Lead
- 9,217
- Total
- 95,577
- vs nation
- R+13.5
- Lead
- 11,973
- Total
- 104,117
- vs nation
- R+18.8
- Lead
- 17,275
- Total
- 98,552
- vs nation
- R+15.1
- Lead
- 2,115
- Total
- 84,280
- vs nation
- R+3.0
- Lead
- 1,678
- Total
- 80,837
- vs nation
- R+6.4
Key facts
- 2024 presidential margin
- R+25.5MIT Election Lab
- Population
- 225,0802024 5-year
- Population density
- 712 / sq mi2024 5-year · TIGER/Line
- Land area
- 316 sq miTIGER/Line
- Median household income
- $119,2092024 5-year
- White (non-Hispanic)
- 71.7%2024 5-year
- Black
- 4.9%2024 5-year
- Hispanic / Latino
- 11.7%2024 5-year
- Peak Democratic margin
- D+14.2 in 1964MIT Election Lab
- Peak Republican margin
- R+53.8 in 1920MIT Election Lab
- Most similar
- State Senate District 8, NY · twin score 91.9
presidential history
Party record book
New Jersey 12th 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
56.8%
27,044 votes · D+14.2 · modeled estimate
Runner-up · Franklin D. Roosevelt, 1936 · 47.2%
Republican
Warren G. Harding1920
76.0%
8,967 votes · R+53.8 · modeled estimate
Runner-up · Dwight D. Eisenhower, 1956 · 74.2%
Most votes
Largest number of votes cast for the party’s presidential nominee here.
Democratic
Joe Biden2020
52,838votes
42.1% of the vote · R+14.1 · modeled estimate
Runner-up · Barack Obama, 2008 · 45,361 votes
Republican
Donald Trump2024
73,752votes
61.7% of the vote · R+25.5 · modeled estimate
Runner-up · Donald Trump, 2020 · 70,546 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
Al Gore2000
−3.0pts D vs U.S.
Place R+2.5 · U.S. D+0.5 · modeled estimate
Runner-up · Bill Clinton, 1996 · −6.4 pts
Republican
Dwight D. Eisenhower1956
+33.3pts R vs U.S.
Place R+48.7 · U.S. R+15.4 · modeled estimate
Runner-up · Herbert Hoover, 1932 · +32.1 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.
Anchored in the rural and suburban communities of northwestern New Jersey, this district delivered a 25-point-plus margin in 2024, making it a reliable outlier in a state that typically trends Democratic in statewide contests.
Across the recorded series it reached a Democratic high of 14.2 points in 1964 and a Republican high of 53.8 points in 1920. Between 2020 and 2024 the district moved 11.4 points toward the Republican candidate; the 2024 margin was 25.5 points.
A population of 225,080, a 72% non-Hispanic-white share, and a median household income of $119,209 describe the district. The district's voting pattern over the last decade is most similar to that of State Senate District 8 and State Senate District 5.
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 12th State Senate District. Akashic. https://akashic.app/sld-upper/34012/. Accessed May 20, 2026. License: CC BY 4.0.