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Suffolk County, New York

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1,083,400
Active registered voters
549,967
Supervoters (50.76%)
5
Presidential cycles of results

Data as of June 19, 2026 · refreshed automatically from the official New York voter file

Suffolk County, New York has 1,083,400 active registered voters — 31.3% Republican, 32.7% Democratic, and 30.2% with no party affiliation, as of June 2026.

Party registration

DEM 32.7%
REP 31.3%
NPA 30.2%
Democratic 354,131 · Republican 339,473 · No Party Affiliation 327,717 · Other parties 62,079
Source: Motion51 voter database — official New York voter file

How Suffolk County voted for president

52.5
46.5
2008
50.8
48.0
2012
44.3
52.5
2016
49.4
49.4
2020
45.0
55.0
2024
■ Democratic %   ■ Republican %  ·  2024 total votes cast: 759,361

Election results are public records.

Source:  Official county canvasses via MIT Election Data + Science Lab

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