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Registration counts: L2 Data · Updated August 24, 2026

Missouri Voter Registration

& Party Affiliation Statistics

Total Registered
4,150,457
Most Active Primary Party
Republican (49.31%)
Independent / NPP
17.16%
Primary Type
State:Open Primary
Pres:Closed Primary
OverviewRegistrationPrimary RulesTurnout
At a Glance

Missouri at a Glance

Key voter registration statistics · Updated 2026

Registered Voters
4,150,457
across 115 counties
Independent / NPP
712.4K
17.16% of registered
2024 Turnout
64.6%
of eligible voters
Primary Participation

Primary Ballot Participation by Party

Missouri does not register voters by party. The breakdown below is modeled from recent primary ballot history.

33.4%
49.3%
17.2%
Democratic33.4%
Republican49.3%
Independent17.2%
Other0.1%
PartyRegistered Voters% of Total
Democratic
1,386,45133.4%
Republican
2,046,70249.3%
Independent
712,35517.2%
Other
4,9490.1%

Note: Missouri does not collect party affiliation at voter registration. These figures are modeled from L2 voter-file analysis of which primary ballot each voter pulled in recent cycles — they reflect primary participation, not party registration.

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Compare Gen Z and Boomer party registration in Florida.

Gen Z is far more likely to register Non-Partisan than Boomers — it’s their single largest category.

Party registration · Florida
Share of each generation
Republican
Boomers44.8%
Gen Z30.6%
Non-Partisan
Boomers20.4%
Gen Z33.5%
Democratic
Boomers32.3%
Gen Z30.3%
Boomers lean heavily Republican — nearly 45% are registered Republican, the dominant party by a wide margin.Gen Z is far more likely to be Non-Partisan (33.5%) than Boomers (20.4%).
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Primary Rules

How Missouri's Primary Works

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

State / Congressional

⚖
Open Primary
Any registered voter can vote in any party's primary, regardless of their own party affiliation or registration status.
How It Works
On election day, voters choose which party's ballot they want. They don't need to be registered with that party. In most open primary states, this choice is made privately at the polling place.
IVP's Position
Better than closed primaries, but still forces voters to pick a party's ballot rather than voting for the best candidate regardless of party.
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 Missouri

How many eligible Missouri residents actually vote?

Recent Elections
ElectionTurnoutVoted
2024 General64.6%3,000,000
2022 General49.7%2,304,250
2020 General65.5%3,026,028
2024 Presidential PrimaryN/A — Missouri repealed its state-run presidential primary (HB 1878, June 2022). R held a closed party-administered caucus (March 2, 2024); D held a party-administered primary (March 23, 2024). No statewide vote aggregate published; delegate counts only.—
2024 State Primary22.1%988,173

Primary turnout figures reflect all voters regardless of party registration. Source: each state’s Secretary of State Statement of Vote.

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