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Jefferson County, New York

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62,472
Active registered voters
29,906
Supervoters (47.87%)
5
Presidential cycles of results

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

Jefferson County, New York has 62,472 active registered voters — 42.9% Republican, 23.5% Democratic, and 28.2% with no party affiliation, as of June 2026.

Party registration

DEM 23.5%
REP 42.9%
NPA 28.2%
Democratic 14,669 · Republican 26,799 · No Party Affiliation 17,621 · Other parties 3,383
Source: Motion51 voter database — official New York voter file

How Jefferson County voted for president

46.7
52.0
2008
47.9
50.8
2012
35.9
58.2
2016
39.5
58.4
2020
38.2
61.8
2024
■ Democratic %   ■ Republican %  ·  2024 total votes cast: 42,743

Election results are public records.

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

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Also see: Motion51 in New York · How to run for office in Jefferson County · Pricing