21,090
Active registered voters
20
Precincts
11,926
Supervoters (56.55%)
5
Presidential cycles of results
Data as of September 22, 2026 · refreshed automatically from the official Colorado voter file
Summit County, CO has 21,090 active registered voters — 14.1% Republican, 26.7% Democratic, and 56.8% with no party affiliation, as of September 2026.
Party registration
Democratic 5,640 · Republican 2,974 · No Party Affiliation 11,974 · Other parties 502
Source: Motion51 voter database — official Colorado voter file
Most reliable-voting precincts
| # | Precinct | Active voters | Supervoters | Supervoter % |
|---|---|---|---|---|
| 1 | 2081359010 | 808 | 572 | 70.79% |
| 2 | 2081359013 | 1,204 | 808 | 67.11% |
| 3 | 2081359012 | 417 | 277 | 66.43% |
| 4 | 2081359011 | 779 | 501 | 64.31% |
| 5 | 2081359017 | 1,189 | 730 | 61.4% |
| 6 | 2081359008 | 502 | 308 | 61.35% |
| 7 | 2081359015 | 900 | 549 | 61.0% |
| 8 | 2081359019 | 1,180 | 719 | 60.93% |
| 9 | 2081359004 | 1,643 | 989 | 60.19% |
| 10 | 2081359003 | 740 | 432 | 58.38% |
Supervoters are active registered voters who cast a ballot in at least 3 of the last 4 November general elections (2018–2024). Percentages are precinct totals from the official state voter file — no individual voter information is shown. Precincts with fewer than 400 active voters are excluded.
Source: Motion51 voter database — official Colorado voter file
How Summit County voted for president
■ Democratic % ■ Republican % · 2024 total votes cast: 17,542
Election results are public records.
Source: Official county canvasses via MIT Election Data + Science Lab
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