Voter file data: L2 Data · Registration counts: Idaho Secretary of State · Updated May 20, 2026

Idaho Voter Registration

& Party Affiliation Statistics

Total Registered

973,660

Largest Party

Republican (61.86%)

Independent / NPP

26.59%

Primary Type

State:Semi-Closed Primary

Pres:Closed Primary

Overview Registration Primary Rules Turnout

At a Glance

Idaho at a Glance

Key voter registration statistics · Updated 2026

Registered Voters

973,660

across 44 counties

Independent / NPP

26.59%

of registered voters

2024 Turnout

64.2%

of eligible voters

Registration

Voter Registration by Party

How many registered Democrats, Republicans, and Independents are in Idaho?

11.54%

61.86%

26.59%

Democratic11.54%

Republican61.86%

Independent/Other26.59%

Party	Registered Voters	% of Total
Democratic	112,409	11.54%
Republican	602,351	61.86%
Independent/Other	258,900	26.59%

Primary Rules

How Idaho's Primary Works

Idaho uses different primary rules for state/congressional and presidential elections

State / Congressional

⚖

Semi-Closed Primary

Registered party members vote in their own party's primary. Unaffiliated voters may choose a party primary to participate in, but voters registered with a different party cannot cross over.

How It Works

If you're registered Democrat, you vote in the Democratic primary. If you're registered Republican, you vote in the Republican primary. If you're unaffiliated, you can pick either; you may need to formally affiliate at the polls.

IVP's Position

An improvement over closed primaries, but still ties the system to party labels. Voters shouldn't have to join a private organization to participate in publicly funded elections.

See all primary systems by state →

Presidential

⚖

Closed Primary

Only voters registered with a political party can vote in that party's primary election. Independent and unaffiliated voters are excluded.

How It Works

Voters must register with a party, often weeks or months before the election, to participate. If you're registered as independent or unaffiliated, you cannot vote in either major party's primary.

IVP's Position

Closed primaries lock millions of independent voters out of the elections that matter most. In many districts, the primary is the only competitive election.

See all primary systems by state →

Turnout

Voter Turnout in Idaho

How many eligible Idaho residents actually vote?

Recent Elections

Election	Turnout	Voted
2024 General	64.2%	917,469
2022 General	42.7%	595,350
2020 General	64.9%	878,527
2024 Presidential Primary	N/A — No state-run presidential primary; legislature inadvertently canceled it in 2023. R held closed caucus (210 sites, March 2); D held closed caucus separately. Registered-party-member participation only.	—
2024 State Primary	27.9%	281,777

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