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Voter file data: L2 Data · Registration counts: Arizona Secretary of State · Updated May 4, 2026

Arizona Voter Registration

& Party Affiliation Statistics

Total Registered
4,417,117
Largest Party
Democratic (28.14%)
Independent / NPP
36.38%
Primary Type
State:Semi-Open Primary
Pres:Closed Primary
OverviewRegistrationPrimary RulesTurnout
At a Glance

Arizona at a Glance

Key voter registration statistics · Updated 2026

Registered Voters
4,417,117
across 15 counties
Registration Rate
83.3%
eligible population
No Party Preference
36.38%
of registered voters
2024 Turnout
63.6%
of eligible voters
Registration

Voter Registration by Party

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

28.14%
35.48%
36.38%
Democratic28.14%
Republican35.48%
Independent/Other36.38%
PartyRegistered Voters% of Total
Democratic
1,243,11328.14%
Republican
1,566,99135.48%
Independent/Other
1,607,01336.38%
Primary Rules

How Arizona's Primary Works

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

State / Congressional

⚖
Semi-Open Primary
Voters don't have to publicly declare a party affiliation, but they must request a specific party's ballot at the polling place.
How It Works
Similar to open primaries, but the party whose ballot you request may be recorded. Some states allow parties to restrict their primaries to registered members, creating a hybrid system.
IVP's Position
Marginally better access for independents, but the party-based structure remains the core limitation.
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 Arizona

How many eligible Arizona residents actually vote?

Eligible vs Registered
83.3% registered
4,417,117 registered5,300,540 eligible
883,423 eligible residents are not registered to vote.
Recent Elections
ElectionTurnoutVoted
2024 General63.6%3,428,011
2022 General49.3%2,592,313
2020 General66.6%3,420,585
2024 Presidential Primary23.6%1,044,604
2024 State Primary26%1,066,000
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