† Citizen voting-age population estimated for prior cycles; 2004 predates the ACS and is extrapolated. Source: ACS 5-year, table B05003.
——
D+60R+60
20042024
Boundary by 2024 margin · Precinct returns · VEST · MIT Election Lab
People and households
Who lives here
Exact values for this place, its state, and the United States.
Race · ethnicity · ancestry
Communities and origins
GroupIselinNew JerseyUnited States
Asian Indian32.3%4.6%1.4%
Chinese5.7%1.6%1.3%
Filipino3.1%1.3%0.9%
Pakistani2.9%0.4%—
Korean1.3%1.1%0.4%
Vietnamese0.6%0.2%0.6%
Nepalese0.4%——
Taiwanese0.4%——
Italian6.6%13.7%4.8%
Irish5.3%12.1%9.4%
German3.3%8.6%12.5%
Polish3.2%4.6%2.2%
American1.6%3.3%5.3%
English1.6%4.9%9.5%
Russian1.0%1.3%—
Hungarian0.9%——
Dominican3.8%4.0%0.7%
Puerto Rican3.1%5.1%1.8%
Mexican2.1%2.6%11.3%
Colombian0.9%1.7%0.4%
Honduran0.8%—0.3%
Peruvian0.8%0.8%—
Ecuadorian0.6%1.7%—
Cuban0.4%0.9%0.7%
African American†7.0%8.6%9.9%
Jamaican0.9%0.8%0.4%
African0.4%0.5%0.5%
Ghanaian0.4%——
Haitian0.4%0.7%0.3%
Nigerian0.3%0.4%0.2%
West Indian0.3%——
Guyanese0.3%0.2%—
Hispanic or Latino counts residents of any race; the race groups count only their non-Hispanic residents, so the groups are mutually exclusive and sum to 100%. Expand a row to see ancestries reported within that group.
Age and life stage
Measure
Iselin
New Jersey
United States
Median age
38.5
40.3
39.1
Age 18–24
8.8%
8.4%
9.2%
Age 65 and older
16.0%
17.1%
17.2%
Household economy
Measure
Iselin
New Jersey
United States
Median household income
$109,500
$103,556
$84,427
Poverty rate
7.9%
9.7%
12.5%
Bachelor's degree or higher (25+)
53.7%
43.5%
35.6%
Languages at home
Measure
Iselin
New Jersey
United States
Speaks a non-English language at home
60.6%
33.2%
22.3%
Spanish
11.6%
17.2%
13.6%
French (incl. Cajun & Haitian)
3.0%
1.1%
0.7%
Other Indo-European
34.1%
5.6%
2.0%
Other Asian & Pacific Island
7.6%
1.6%
1.1%
Religious landscape
Measure
Iselin
New Jersey
United States
Catholic
—
32.0%
18.6%
Evangelical Protestant
—
5.1%
16.5%
Unclaimed / not counted
—
47.8%
51.5%
American Community Survey 2024 5-year (CVAP, income, age, poverty, education, language, race, ancestry) · presidential returns from MIT Election Lab through 2024 · 2020 U.S. Religion Census (ASARB) — congregational adherents; unclaimed is the residual not counted by congregations.
Iselin, New Jersey
presidential history
Presidential margin, 2004–2024
Democratic minus Republican, by election
Presidential margin over time
Year
Margin (D minus R)
2004
+13.3%
2008
+21.4%
2012
+30.8%
2016
+25.6%
2020
+20.2%
2024
−0.1%
DemocraticRepublican
6 presidential elections
Third column names the leading third-party or independent finisher. Source · MIT Election Lab · ICPSR · VEST (precinct-level 2024). Swing · margin change from the prior cycle. vs U.S. · margin relative to the national result that year. Third-party votes in 2012 are allocated from certified county totals by this place's share of each county's two-party vote — that cycle's precinct source records two-party splits. † 2004, 2020 sub-county results are estimated: the source's block-level detail for these cycles was unreliable — either county/municipality-level consolidated reporting (COVID-era) or a precinct-to-block allocation that misplaced votes — so the figures are allocated from the constituent county totals in proportion to the place and scaled to certified totals.
Year
Won
Democratic
Republican
Other
Margin
Swing
vs U.S.
Total
R
48.2%Harris3,546
48.2%Trump3,552
3.6%
R+0.1
R+20.2
D+1.4
7,364
D
59.7%Biden4,751
39.6%Trump3,147
0.7%
D+20.2
R+5.5
D+15.7
7,956
D
61.8%Clinton4,074
36.2%Trump2,385
2.0%
D+25.6
R+5.1
D+23.5
6,589
D
64.7%Obama3,803
34.0%Romney1,995
1.3%
D+30.8
D+9.4
D+26.9
5,876
D
60.1%Obama4,018
38.7%McCain2,588
1.2%
D+21.4
D+8.1
D+14.1
6,689
D
56.0%Kerry3,452
42.7%Bush2,631
1.3%
D+13.3
—
D+15.8
6,162
Iselin's demographic center of gravity has shifted markedly over recent decades, with residents of South Asian origin now comprising a substantial share of the population — a pattern that tracks closely with naturalization rates and turnout trends in statewide races.
Across the recorded series it reached a Democratic high of 30.8 points in 2012 and a Republican high of 0.1 points in 2024. Between 2020 and 2024 the city moved 20.2 points toward the Republican candidate; the 2024 margin was 0.1 points.
A population of 19,551, a 23% non-Hispanic-white share, and a median household income of $109,500 describe the city. The city's voting pattern over the last decade is most similar to that of Carteret and Secaucus.
Akashic
Political twins — cities
The cities 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.
In 2024, Iselin, New Jersey voted a near-tie (R+0.1), carried by the Republican candidate. Out of 7,364 votes cast, 3,546 went Democratic and 3,552 went Republican.
When did Iselin, New Jersey last vote Democratic?
The most recent presidential election in which Iselin, New Jersey voted Democratic was 2020.
How many people live in Iselin, New Jersey?
Iselin, New Jersey has a population of 19,551 according to the 2024 American Community Survey 5-year estimates from the US Census Bureau.
What is the median household income in Iselin, New Jersey?
Median household income in Iselin, New Jersey is $109,500 — above the national median of $80,734. The New Jersey state median is $103,556.
What is the political history of Iselin, New Jersey?
Akashic tracks 6 presidential elections in Iselin, New Jersey from 2004 to 2024. Of those, 5 went Democratic and 1 went Republican.
