Nassau County, NY

NY · Presidential Elections 1900–2024

R+4.1
2024 Margin
R+13.7%
2020→2024 Swing
R since 2024
Voting Streak
1.4M
Population

Nassau County, NY (New York) voted R+4.1 for Donald Trump (Republican) in the 2024 presidential election, with Trump receiving 368,138 votes (51.44%) to 338,453 (47.29%) for Harris.

This represents a R+13.7% swing toward Republicans compared to 2020. Nassau County is classified as a competitive Republican county. Nassau County has voted Republican in every presidential election since 2024. The county has a population of approximately 1,389,591.

Quick Stats

2024 ResultR+4.1
2020→2024 SwingR+13.7%
Voting StreakR since 2024
Elections on Record32

Demographics

Population1,389,591
Median Age
42.0(US: 38.7)
College (BA+)
49.7%(US: 35.2%)
Median Income
$146,202(US: $80k)
White (non-Hisp)
55.4%(US: 57.6%)
Hispanic
18.7%(US: 19.1%)
Black
11.0%(US: 12.2%)
Asian
11.3%(US: 5.7%)
Homeownership
82.0%(US: 64.5%)
Poverty Rate
5.4%(US: 12.3%)
Veterans
3.0%(US: 6.2%)
Non-English (CVAP)
25.2%(US: 17.0%)
Source: Census ACS 5-Year (2020-2024)

Community Profile

Religious Composition

Source: Religion Census 2020
Catholic
45.4%(Major Center)
Jewish
4.4%(Primary Hub)
Evangelical
3.6%(Below Average)
Mainline Protestant
3.0%
Black Protestant
1.3%
+ 1 more traditions

Ancestry Groups

Source: Census ACS

Top reported ancestry groups (compared to national average).

Italian
16.4%Significant Hub(3.4x)
Irish
11.7%(1.3x)
German
6.9%
West Indian
4.1%Major Concentration(4.5x)
American Heritage
3.7%
Polish
3.5%(1.4x)
+ 5 more reported ancestry groups

Age Distribution

Median:42.0 yrs(US: 38.5)
Under 18
21.5%
18-29
8.3%↓
30-44
17.7%
45-64
33.9%↑
65+
18.7%
National average

Employment by Industry

Census ACS
Professional & Technical
13.7%(1.2x US)
Retail Trade
9.0%(0.8x US)
Educational Services
6.4%(0.7x US)
Construction
6.1%
Manufacturing
4.1%(0.4x US)
Healthcare & Social Services
3.7%(0.8x US)
National average

Presidential Elections

Presidential Results

YearDemocratRepublicanMarginSwing
202447.3%(338,453)51.4%(368,138)R+4.1R+13.7
202054.2%(396,504)44.7%(326,716)D+9.5D+3.3
201651.3%(332,154)45.1%(292,025)D+6.2R+1.4
201253.3%(302,695)45.6%(259,308)D+7.6R+0.8
200853.8%(342,185)45.4%(288,776)D+8.4D+2.8
200452.3%(323,070)46.6%(288,355)D+5.6R+13.9
200058.0%(342,226)38.5%(227,060)D+19.5R+0.1
199655.7%(303,587)36.1%(196,820)D+19.6D+13.7
199246.4%(282,593)40.5%(246,881)D+5.9D+20.6
198842.2%(250,130)57.0%(337,430)R+14.7D+9.1

Source: Official state election returns via MIT Election Data + Science Lab

Presidential Margin Trend

Nassau County, NY • 1900–2024

D+R++60+40+200-20-40-601900190819161924193219401948195619641972198019881996200420122020
Democratic margin
Republican margin

Senate Elections

Senate Results

YearDemocratRepublicanMarginSwing
202449.7%(344,787)49.8%(345,325)R+0.1D+1.3
202246.0%(236,556)47.3%(243,467)R+1.3R+19.2
201858.9%(294,186)41.0%(204,875)D+17.9R+13.0
201664.7%(403,274)33.8%(210,823)D+30.9D+2.2
201263.8%(342,644)35.1%(188,430)D+28.7D+0.6
2010112.0%(432,704)83.9%(324,062)D+28.1D+5.9
200660.5%(221,110)38.2%(139,775)D+22.2R+16.5
200466.5%(387,085)27.7%(161,395)D+38.7D+47.0
200045.1%(263,962)53.4%(312,252)R+8.3R+1.8
199846.5%(196,881)52.9%(224,125)R+6.4R+9.9

Source: Official state election returns via MIT Election Data + Science Lab

Governor Elections

Governor Results

YearDemocratRepublicanMarginSwing
202244.8%(232,036)55.2%(286,147)R+10.4R+26.1
201856.9%(281,730)41.3%(204,399)D+15.6D+6.9
201452.8%(168,570)44.1%(140,842)D+8.7R+15.7
201060.5%(233,349)36.2%(139,432)D+24.4R+6.6
200664.9%(234,452)33.9%(122,567)D+31.0D+66.1
200226.4%(99,865)61.5%(232,785)R+35.1D+1.3
199828.3%(119,911)64.7%(274,105)R+36.4R+29.7
199444.7%(204,063)51.4%(234,382)R+6.6R+29.9
199049.3%(175,153)26.0%(92,486)D+23.3D+2.0
198656.7%(223,651)35.5%(139,924)D+21.2D+25.1

Source: Official state election returns via MIT Election Data + Science Lab

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