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Onondaga County, New York

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303,288
Active registered voters
164,917
Supervoters (54.38%)
5
Presidential cycles of results

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

Onondaga County, New York has 303,288 active registered voters — 26.9% Republican, 36.8% Democratic, and 30.3% with no party affiliation, as of June 2026.

Party registration

DEM 36.8%
REP 26.9%
NPA 30.3%
Democratic 111,596 · Republican 81,563 · No Party Affiliation 91,933 · Other parties 18,196
Source: Motion51 voter database — official New York voter file

How Onondaga County voted for president

59.3
38.9
2008
59.7
38.6
2012
53.6
40.8
2016
59.2
38.6
2020
58.6
41.4
2024
■ Democratic %   ■ Republican %  ·  2024 total votes cast: 227,071

Election results are public records.

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

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