Types of Primary Elections: Which Primary Can You Vote In?

Primaries are how political parties select their candidates to represent them in the general election. Party primaries happen in presidential, statewide, and local elections. Some states use different types of primaries for different levels of elections, while others allow each political party to decide which type of primary it will hold.

Primary elections are often held six to nine months before the presidential election. The state’s registered voters cast their votes for their preferred presidential candidate in secret ballots. The state considers the primary election‘s result when awarding delegates to the candidates.

If you want to vote in your state’s primary, it’s important to take the following steps:

1. Determine your state’s primary system
2. Check your voter registration status
3. Understand your state’s party registration requirements
4. Register or change party affiliation (if needed)

Below, we explain the different types of primaries and which states use them.

Types of Primary Elections

A party’s primary election can happen in several forms. The main types are open primaries, closed primaries, and semi-closed (or mixed) primaries. Some states also use top-two or top-four primary systems. Understanding which type your state uses is crucial because it determines whether you need to register with a political party to participate. Let’s examine each type.

Open Primary Elections

In open primary elections, any registered voter can pick candidates from any political party. It allows eligible voters to vote even if they aren’t registered with that party. Fourteen states require open primaries by law.

The following states allow open primaries for at least one political party:

• Alabama (no partisan registration, and voters are bound to their party if there is a run-off)
• Arkansas
• Georgia (no partisan registration, and voters are bound to their party if there is a run-off)
• Hawaii (no partisan registration and voters may select one primary to vote in)
• Idaho (Democratic Party only)
• Kansas (Democratic Party only)
• Michigan (no partisan registration, and voters may select one primary to vote in)
• Minnesota (no partisan registration, voters may select one primary to vote in)
• Mississippi (no partisan registration, voters are bound to their party if there is a run-off)
• Missouri
• Montana
• North Dakota (no partisan registration, voters may select one primary to vote in)
• South Carolina (no partisan registration, voters may select one primary to vote in)
• Texas (voter affiliation is determined during the primary; the voter cannot switch parties before the general election; voters are bound to their party in the event of a runoff)
• Utah (Democratic Party only)
• Vermont (no partisan registration, voters may select one primary to vote in)
• Virginia (no partisan registration, voters may select one primary to vote in)
• Wisconsin (no partisan registration, voters may select one primary to vote in)

Further details are available at each state’s voting website and the Secretary of State’s office.

Closed Primary Elections

Closed primary elections limit participation to registered voters affiliated with a particular party. The election in a closed primary is more restrictive, as only declared party members can vote. Thirteen states have closed primaries by state law.

The following states have closed primaries for at least one political party:

• Connecticut
• Delaware
• Florida
• Idaho (Republican Party only)
• Illinois (voters must declare an affiliation on election day)
• Indiana (state law requires voters to have voted for a party’s nominees in the previous election or plan to vote for a party’s nominees in this election to vote in the primary)
• Iowa (only registered voters may vote in the primary, but voters may change their party affiliation on the day of the primary)
• Kansas (Republican Party only)
• Kentucky
• Maryland
• Nebraska (Republican Party only)
• Nevada
• New York
• New Jersey
• Ohio
• Oklahoma
• Oregon
• Pennsylvania
• South Dakota (Republican Party only)
• Tennessee
• Utah (Republican Party only)
• Washington, D.C.
• West Virginia (Republican Party only)
• Wyoming

If you’re a registered member of one party, you cannot vote in a different party’s primary unless you’re willing to switch parties.

Semi-Open Primary Elections

In a “semi-open” primary, a voter may vote in one of the two primary elections. They must request a party-specific ballot. In practice, it works like this:

In an open primary, anyone may vote regardless of party affiliation. Ballots list all candidates, and any voter may choose any candidate.

In a closed primary, only voters from the party may vote in their party’s primary election. Each party has its own ballots and votes on different days.

In a semi-open primary, anyone may vote but must request the party’s ballot. Each party has its own ballot, and you may request either one. A semi-open primary lets other parties and unaffiliated voters, such as independents, vote in the major parties’ primaries if they wish.

The semi-closed primary or mixed primary is the middle ground. Independent or unaffiliated voters can take part in the primary election of any political party they choose. Voters with a political affiliation can only take part in their political party‘s primary election.

The following states have semi-closed primaries for at least one political party:

• Arizona
• Colorado
• Louisiana
• Maine
• Massachusetts
• Nebraska
• New Hampshire
• New Mexico
• North Carolina
• Rhode Island
• South Dakota (semi-closed for Democratic Party)
• West Virginia (semi-closed for Democratic Party)

Make sure you understand the rules involved before requesting a ballot in a semi-closed primary.

Top-Two Primary System (Nonpartisan Blanket Primary)

States like California, Washington, and Nebraska use top-two primary systems. This means the candidates who gained the top two vote tallies advance to the general election. In a top-two or blanket primary, the top candidates go on to the general, regardless of party. Two Republicans or two Democrats could face one another in the general election. This is also known as a “jungle primary.”

The following states use top-two primaries:

• California (all races except president)
• Washington (all races except president)
• Nebraska (state legislature only)
• Louisiana (uses its own system to determine who may vote in a primary based on state law)

Top-two primaries evolved from blanket primaries. In a blanket primary, all candidates ran on the same ballot, and voters could elect one candidate for each office regardless of party affiliation.

The U.S. Supreme Court ruled that blanket primaries were unconstitutional because they violated political parties‘ First Amendment right to freedom of association. States then developed top-two primaries as a constitutional alternative that achieves similar goals while respecting party rights.

Top-Four Primary System with Ranked Choice Voting

Alaska is the only state to use a top-four primary system. Narrowly passed in 2020, this system replaces closed, partisan primaries with open nonpartisan primaries. The top four winners in the primaries advance to the general election. The system also uses ranked choice voting (RCV). In RCV, if there is no majority winner, the candidate with the fewest first-preference votes is eliminated. Votes are then tallied by ranking to determine whether any received a majority. The process continues until a candidate receives a majority.

Can Independents Vote in Primary Elections?

Independent, third-party, and unaffiliated voters can vote in all states with open and semi-open primaries. Most states have certain requirements for parties to be recognized by the Secretary of State and obtain ballots. Once that happens, third parties can run their own primaries.

In states with closed primaries, independent voters cannot vote in some of the congressional or presidential primaries. Seven states have closed presidential primaries, and sixteen states have closed congressional or state primaries.

How Do I Register or Change My Party Affiliation?

Registering or changing your party affiliation often uses the same process as voter registration. Depending on your state, you may have the option to register online, via mail, or in person at an election office or the DMV. Some states allow same-day party registration at the polls.

If you need to register with a party or change your existing party registration, you need to know your state’s deadline, which can vary. For example:

• New York: Must change party affiliation 25 days before the general election to vote in next year’s primary (nearly a year in advance) – one of the strictest
• Florida: Must register with the party 29 days before the primary
• California: Can register or change party up to 15 days before the primary

All states allow you to change your party affiliation at any time. Timing is crucial, so check your state’s deadline.

Can You Vote in Both Parties’ Primaries?

You can’t vote in both parties’ primaries. Doing so is illegal and can constitute election fraud. Even in open primary states where you can choose which primary to vote in, you can only participate in ONE party’s primary per election.

This means that:

• You cannot vote in the Democratic primary AND the Republican primary
• You cannot vote in one party’s presidential primary and another party’s congressional primary

Attempting to vote in both primaries can result in both of your ballots being invalidated. You can also be removed from the voter rolls. In rare cases, it can even lead to criminal charges.

Your Voting Rights in Primary Elections

Political parties have First Amendment rights to freedom of association. This includes the right to decide who can be members and how they select their nominees. The Supreme Court has upheld the right of parties to use closed primaries.

However, states also have the power to run elections and can require certain primary systems. The balance between party rights and voter access varies by state.

You have the right to:

• Register with any political party you choose
• Change your party affiliation (subject to deadlines)
• Vote in primaries according to your state’s rules
• Vote for any candidate you want in the general election, regardless of your party registration
• Challenge the improper denial of your ballot
• Privacy in how you vote (secret ballot)

However, you do NOT have the right to:

• Vote in the primaries of a party you’re not eligible to vote in under your state’s rules
• Vote in multiple parties’ primaries in the same election
• Demand that a party allow you to participate if you don’t meet their requirements (in closed primary states)

If your eligibility to vote in a primary is questioned, ask for a provisional ballot. If poll workers refuse to give you a provisional ballot, request to speak to a supervisor. You can also call the national voter protection hotline at 866-OUR-VOTE (866-687-8683) for help.

It’s important to document any issues you encounter at the polls. Doing so can be extremely helpful if you decide to seek legal help.

Get Legal Help With Voting Rights Issues

Understanding primary voting rules can be complex, especially with different systems in each state. If you believe someone has violated your rights to participate in a primary election, contact a civil rights attorney near you. They can help protect your voting rights and provide guidance on navigating your state’s primary system.

Consider consulting an attorney if:

• You were improperly denied the right to vote in a primary
• Your voter registration was incorrectly changed, purged, or challenged
• You face penalties for an honest mistake about the primary voting rules
• You experienced discrimination, intimidation, or voter suppression at the polls
• Your party registration was changed without your knowledge or consent

Your voting rights are backed by the U.S. Constitution. Make sure to vote on Election Day!