Colorado Party Affiliation

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Colorado Voter Registration by Party, 2014–2026 — ThinkWyn Voter Studio

COLORADO:Party Affiliation

Half of Colorado's active voters now belong to no party.

50.5%of active registered voters are unaffiliated

May 2026

Unaffiliated registration has roughly doubled since 2014 — from about 1.01M to 2.06M active voters — while both major parties' shares of the electorate declined. Unaffiliated voters are now the largest group in 47 of 64 counties, up from 15 in 2014. Scrub the timeline to watch the shift, county by county.

Source: CO Voter Registration.

Statewide share of active registered voters

2026

Legend + Controls

2026

20142026

Unaffiliated share of active voters

Nov snapshots; 2026 = May report. Chart lines: unaffiliated orange, Democratic and Republican in equally muted tones, minor parties gray — no endorsement implied.