Primary Rules
How Iowa's Primary Works
Iowa uses a Closed Primary system
Closed Primary
Only voters registered with a political party can vote in that party's primary election. Independent and unaffiliated voters are excluded.
Registration counts: Voter Count · Updated November 2, 2026
Iowa Voter Registration
& Party Affiliation Statistics
Total Registered
2,050,884
Largest Party
Republican (36.96%)
Independent / NPP
33.65%
Primary Type
Closed Primary
All data provided by
(opens votercount.ai in a new tab)The only AI tool connected to L2’s industry-leading national voter file.
Ask about any county, age group, or district in Iowa, in plain English, and get answers in seconds.
At a Glance
Iowa at a Glance
Key voter registration statistics · Updated 2026
Registered Voters
2,050,884
across 99 counties
Independent / NPP
690.1K
33.65% of registered
2024 Turnout
71%
of eligible voters
About 38% of voters in Story County and Scott County are registered independents, compared with 33.65% across Iowa. The two tie for the highest share of any Iowa county with at least 50,000 voters.
Answered directly from the voter file with Voter Count
Registration
Voter Registration by Party
How many registered Democrats, Republicans, and Independents are in Iowa?
Democratic28.6%
Republican37.0%
Independent33.7%
Other0.8%
| Party | Registered Voters | % of Total |
|---|---|---|
Democratic | 586,106 | 28.6% |
Republican | 757,953 | 37.0% |
Independent | 690,110 | 33.7% |
Other | 16,715 | 0.8% |
Turnout
Voter Turnout in Iowa
How many eligible Iowa residents actually vote?
Recent Elections
| Election | Turnout | Voted |
|---|---|---|
| 2024 General | 71.0% | 1,674,011 |
| 2022 General | 52.0% | 1,230,417 |
| 2020 General | 72.0% | 1,700,130 |
| 2024 Presidential Primary | 5.4% | 110,272 |
| 2024 State Primary | Estimated ~17% of registered voters — Iowa SoS publishes a county-level turnout PDF (sos.iowa.gov) but no published statewide aggregate total; figure is derived from county-level summing | — |
Primary turnout figures reflect all voters regardless of party registration. Source: each state’s Secretary of State Statement of Vote.
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All data provided by
(opens votercount.ai in a new tab)The only AI tool connected to L2’s industry-leading national voter file.
Ask about any county, age group, or district in Iowa, in plain English, and get answers in seconds.