Suffolk County, NY

NY · Presidential Elections 1892–2024

R+9.9
2024 Margin
R+9.9%
2020→2024 Swing
R since 2016
Voting Streak
1.5M
Population

Suffolk County, NY (New York) voted R+9.9 for Donald Trump (Republican) in the 2024 presidential election, with Trump receiving 417,549 votes (54.74%) to 341,812 (44.81%) for Harris.

This represents a R+9.9% swing toward Republicans compared to 2020. Suffolk County is classified as a lean Republican county. Suffolk County has voted Republican in every presidential election since 2016. The county has a population of approximately 1,530,146.

Quick Stats

2024 ResultR+9.9
2020→2024 SwingR+9.9%
Voting StreakR since 2016
Elections on Record34

Demographics

Population1,530,146
Median Age
41.7(US: 38.7)
College (BA+)
40.2%(US: 35.2%)
Median Income
$130,686(US: $80k)
White (non-Hisp)
63.1%(US: 57.6%)
Hispanic
22.8%(US: 19.1%)
Black
7.5%(US: 12.2%)
Asian
4.3%(US: 5.7%)
Homeownership
82.2%(US: 64.5%)
Poverty Rate
6.4%(US: 12.3%)
Veterans
4.0%(US: 6.2%)
Non-English (CVAP)
17.9%(US: 17.0%)
Source: Census ACS 5-Year (2020-2024)

Community Profile

Religious Composition

Source: Religion Census 2020
Catholic
54.9%(Major Center)
Evangelical
3.6%(Below Average)
Mainline Protestant
3.2%
Black Protestant
0.7%
Jewish
0.7%(Above Average)
+ 1 more traditions

Ancestry Groups

Source: Census ACS

Top reported ancestry groups (compared to national average).

Italian
20.6%Major Concentration(4.3x)
Irish
16.2%Above Average(1.7x)
German
11.0%
Puerto Rican
4.3%Significant Hub(2.6x)
English
4.2%
Polish
4.0%Above Average(1.6x)
+ 5 more reported ancestry groups

Age Distribution

Median:41.7 yrs(US: 38.5)
Under 18
20.8%
18-29
8.9%↓
30-44
18.2%
45-64
34.2%↑
65+
17.9%
National average

Employment by Industry

Census ACS
Professional & Technical
13.2%(1.1x US)
Retail Trade
10.6%
Construction
7.8%(1.1x US)
Educational Services
6.8%(0.8x US)
Manufacturing
6.4%(0.7x US)
Healthcare & Social Services
4.2%
National average

Presidential Elections

Presidential Results

YearDemocratRepublicanMarginSwing
202444.8%(341,812)54.7%(417,549)R+9.9R+9.9
202049.4%(381,021)49.4%(381,253)R+0.0D+6.8
201644.6%(303,951)51.5%(350,570)R+6.8R+10.5
201251.2%(304,079)47.5%(282,131)D+3.7R+2.3
200852.5%(346,549)46.5%(307,021)D+6.0D+5.1
200449.5%(315,909)48.5%(309,949)D+0.9R+10.4
200053.4%(306,306)42.0%(240,992)D+11.4R+4.3
199651.8%(261,828)36.1%(182,510)D+15.7D+17.2
199238.9%(220,811)40.4%(229,467)R+1.5D+20.3
198838.7%(199,215)60.5%(311,242)R+21.8D+10.5

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

Presidential Margin Trend

Suffolk County, NY • 1892–2024

D+R++60+40+200-20-40-6018921900190819161924193219401948195619641972198019881996200420122020
Democratic margin
Republican margin

Senate Elections

Senate Results

YearDemocratRepublicanMarginSwing
202447.1%(348,948)52.5%(389,431)R+5.5D+1.3
202241.4%(232,041)48.2%(269,874)R+6.8R+16.2
201854.7%(289,528)45.3%(239,477)D+9.5R+12.6
201660.1%(390,754)38.1%(247,391)D+22.1R+5.8
201263.3%(354,929)35.4%(198,683)D+27.9D+4.1
2010111.9%(424,586)88.2%(334,438)D+23.8D+3.4
200659.4%(210,104)39.0%(137,964)D+20.4R+18.5
200466.8%(391,950)27.9%(163,470)D+38.9D+55.0
200041.1%(234,418)57.2%(326,230)R+16.1R+10.4
199846.7%(169,876)52.4%(190,533)R+5.7D+6.7

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

Governor Elections

Governor Results

YearDemocratRepublicanMarginSwing
202241.6%(235,736)58.4%(330,337)R+16.7R+21.8
201851.4%(274,518)46.3%(247,169)D+5.1D+5.5
201447.9%(155,031)48.3%(156,351)R+0.4R+19.3
201057.7%(227,374)38.8%(152,813)D+18.9R+9.1
200663.3%(223,453)35.3%(124,571)D+28.0D+63.7
200223.4%(82,776)59.1%(209,361)R+35.7R+1.1
199826.3%(97,164)60.9%(224,797)R+34.6R+13.6
199437.0%(149,100)58.0%(233,799)R+21.0R+36.8
199046.3%(142,250)30.5%(93,863)D+15.7R+12.7
198661.6%(193,889)33.1%(104,359)D+28.4D+37.5

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

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