List of States with Open and Closed Primaries

 Primaries: Open and Closed

Open primaries (or pick-a-party) are those in which voters of any affiliation may vote for the slate of any party.

Closed primaries are those in which only the voters affiliated with a party may vote in its primary.

Blanket primaries (or “jungle primaries”) are those in which voters, regardless of affiliation, may choose the party primary in which they want to vote on an office-by-office basis. The blanket primary was struck down in 2001 by the Supreme Court in CA Democratic Party v. Jones.

The following is a running list of states by primary type: open, potentially closed, or with special provisions. We say “potentially” because these states require voters to affiliate by party, which allows parties the option to close their primaries.

Please contact with any questions.

State Closed Open Other Remarks
Alabama x
Alaska x Blanket primary for four of five registered parties. Republicans use closed primary.
Arizona x
Arkansas x Voter must vote in runoff primary of same party.
California x
Colorado x
Connecticut x
Delaware x
District of Columbia x
Florida x
Georgia x Voter must vote in runoff primary of same party.
Hawaii x
Idaho x
Illinois x Must vote in primary of same party as last primary vote. Loosely enforced.
Indiana x
Iowa x Voter may change registration at polls.
Kansas x
Kentucky x
Louisiana x “Effectively open. Top-two runoff system (\””cajun primary\””) used. Closed primary used for Congressional races after 2006.”
Maine x
Maryland x
Massachusetts x
Michigan x
Minnesota x
Mississippi x
Missouri x
Montana x
Nebraska x
Nevada x
New Hampshire x
New Jersey x
New Mexico x
New York x
North Carolina x
North Dakota x
Ohio x Must vote in primary of same party as last primary vote. Loosely enforced.
Oklahoma x
Oregon x
Pennsylvania x
Rhode Island x
South Carolina x Voter must vote in runoff primary of same party.
South Dakota x
Tennessee x
Texas x Voter must vote in runoff primary of same party.
Utah x Currently only Republicans close primary.
Vermont x
Virginia x
Washington x
West Virginia x Currently only Democrats close primary.
Wisconsin x
Wyoming x

12 Responses to “List of States with Open and Closed Primaries”

  1. steven slaton Says:

    when did arizona closed its Primary. it was open just last week?

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  9. maven2379 Says:

    Just to let you know I registered to vote in Louisiana, and I can’t vote for Ron Paul tomorrow!! They tell me it’s a “closed” primary it sucks but what ya gonna do. I guess I’ll write his name in on the actual election!!

  10. Linda Kremmel Says:

    I not to mention my guys have been following the nice advice found on your website while at once I had an awful feeling I had not expressed respect to the site owner for them. These guys were so joyful to see all of them and already have in fact been taking pleasure in them. Thank you for really being simply considerate as well as for getting such important themes most people are really wanting to be informed on. Our own sincere regret for not expressing gratitude to you sooner.

  11. Bill Silver Says:

    I was told that Florida has a “universal” Primary. What is that?

  12. ben Says:

    Maine actually has option for parties to choose open primary.

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