Idaho Party Registration Over Time

Changes in State Level Registrations by Party
Data Used in Analysis

Idaho Party Registration 2012 to 2026

Republican
Democratic
Unaffiliated
Libertarian
Constitution

Stacked area shows proportional share. Republicans grew from 26% to 61% while unaffiliated voters dropped from 69% to 25%.

Republican
Democratic
Unaffiliated
Libertarian
Constitution

Total registrations peaked near 1.07M in 2024. Republican registrations more than tripled over the period.

Republican
Democratic
Unaffiliated
Libertarian

Net change between measurement years. The 2016 cycle saw enormous Republican growth (+152K) alongside unaffiliated collapse (−114K).

Republican gain

+426K

2012 → 2026

Unaffiliated loss

−290K

2012 → 2026

Democratic gain

+82K

peaked 2020, now declining

GOP share 2026

61.5%

up from 25.5% in 2012

Party 20122016202020242026 Total Δ
Source: Idaho Secretary of State — Voter Registration Totals
Changes in County Level Registrations Over Time
Date Used in Analysis

Idaho Data · Christian Lindke

Voter Registration by County

Party registration shifts across Idaho's 44 counties, 2016–2025. Toggle view tabs and party to explore.

Republican

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Democratic

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Unaffiliated

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Population denominator: 2020 U.S. Decennial Census county totals. Idaho has grown since 2020 — 2024–2025 figures slightly overstate registration density.
Party
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