2026 state list
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Twenty states have fully open primaries in 2026: Alabama, Arkansas, Georgia, Hawaii, Illinois, Indiana, Michigan, Minnesota, Mississippi, Missouri, Montana, New Mexico, North Dakota, Ohio, South Carolina, Tennessee, Texas, Vermont, Virginia, and Wisconsin.
Open Primary Guide also counts three semi-open states and three nonpartisan states, so 26 states let every registered voter cast a primary ballot without joining a party. The other 25 jurisdictions, including D.C., use closed or semi-closed rules.
Twenty states have fully open primaries. Add Arizona, Colorado, and Maine (semi-open) and California, Washington, and Alaska (nonpartisan single ballot), and 26 states give every voter a primary ballot with no party membership required.
Counts elsewhere vary because sources label borderline states differently. This guide follows the six-category classification in the 2026 state-by-state primary guide. See our methodology for details.
20 states
Any voter can vote in any party primary. No party registration is required.
Alabama, Arkansas, Georgia, Hawaii, Illinois, Indiana, Michigan, Minnesota, Mississippi, Missouri, Montana, New Mexico, North Dakota, Ohio, South Carolina, Tennessee, Texas, Vermont, Virginia, Wisconsin
3 states
Any voter can request a party ballot, but the choice may be recorded.
Arizona, Colorado, Maine
10 jurisdictions
Unaffiliated voters can pick a party ballot. Registered members of other parties cannot cross over.
District of Columbia, Idaho, Massachusetts, Nebraska, New Hampshire, North Carolina, Oklahoma, Rhode Island, Utah, West Virginia
15 states
Only registered party members can vote in that party primary. Independents are excluded.
Connecticut, Delaware, Florida, Iowa, Kansas, Kentucky, Louisiana, Maryland, Nevada, New Jersey, New York, Oregon, Pennsylvania, South Dakota, Wyoming
2 states
One ballot lists every candidate for every voter. The top two finishers advance.
California, Washington
1 state
One ballot lists every candidate for every voter. The top four advance to a ranked-choice general election.
Alaska
Search by name or filter by type. Each row links to that state's registration, turnout, and primary rules data.
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| State | Primary type | Notes | State data |
|---|---|---|---|
| Alabama (AL) | Open | Alabama voter data | |
| Alaska (AK) | Top-Four | Presidential primary is closed | Alaska voter data |
| Arizona (AZ) | Semi-Open | Arizona voter data | |
| Arkansas (AR) | Open | Arkansas voter data | |
| California (CA) | Top-Two | Adopted by Proposition 14 in 2010 | California voter data |
| Colorado (CO) | Semi-Open | Colorado voter data | |
| Connecticut (CT) | Closed | Connecticut voter data | |
| Delaware (DE) | Closed | Delaware voter data | |
| District of Columbia (DC) | Semi-Closed | District of Columbia voter data | |
| Florida (FL) | Closed | Florida voter data | |
| Georgia (GA) | Open | Georgia voter data | |
| Hawaii (HI) | Open | Hawaii voter data | |
| Idaho (ID) | Semi-Closed | Idaho voter data | |
| Illinois (IL) | Open | Illinois voter data | |
| Indiana (IN) | Open | Indiana voter data | |
| Iowa (IA) | Closed | Iowa voter data | |
| Kansas (KS) | Closed | Kansas voter data | |
| Kentucky (KY) | Closed | Kentucky voter data | |
| Louisiana (LA) | Closed | Louisiana voter data | |
| Maine (ME) | Semi-Open | Maine voter data | |
| Maryland (MD) | Closed | Maryland voter data | |
| Massachusetts (MA) | Semi-Closed | Massachusetts voter data | |
| Michigan (MI) | Open | Michigan voter data | |
| Minnesota (MN) | Open | Minnesota voter data | |
| Mississippi (MS) | Open | Mississippi voter data | |
| Missouri (MO) | Open | Missouri voter data | |
| Montana (MT) | Open | Montana voter data | |
| Nebraska (NE) | Semi-Closed | Nebraska voter data | |
| Nevada (NV) | Closed | Nevada voter data | |
| New Hampshire (NH) | Semi-Closed | New Hampshire voter data | |
| New Jersey (NJ) | Closed | New Jersey voter data | |
| New Mexico (NM) | Open | New Mexico voter data | |
| New York (NY) | Closed | New York voter data | |
| North Carolina (NC) | Semi-Closed | North Carolina voter data | |
| North Dakota (ND) | Open | North Dakota voter data | |
| Ohio (OH) | Open | Ohio voter data | |
| Oklahoma (OK) | Semi-Closed | Oklahoma voter data | |
| Oregon (OR) | Closed | Oregon voter data | |
| Pennsylvania (PA) | Closed | Pennsylvania voter data | |
| Rhode Island (RI) | Semi-Closed | Rhode Island voter data | |
| South Carolina (SC) | Open | South Carolina voter data | |
| South Dakota (SD) | Closed | South Dakota voter data | |
| Tennessee (TN) | Open | Tennessee voter data | |
| Texas (TX) | Open | Texas voter data | |
| Utah (UT) | Semi-Closed | Utah voter data | |
| Vermont (VT) | Open | Vermont voter data | |
| Virginia (VA) | Open | Virginia voter data | |
| Washington (WA) | Top-Two | Adopted in 2004 | Washington voter data |
| West Virginia (WV) | Semi-Closed | West Virginia voter data | |
| Wisconsin (WI) | Open | Wisconsin voter data | |
| Wyoming (WY) | Closed | Wyoming voter data |
Party deadlines differ sharply. Ballotpedia's survey of primary election types by state includes one state where a voter must affiliate with a party 29 days before the primary, and another where an affiliated voter may switch up to 15 days prior.
New York set February 14 as the enrollment deadline for its June 23, 2026 primary. About 3,187,610 New Yorkers, 25.4% of the electorate, are enrolled in no party and get no primary ballot.
Some sources call a state open if independents can vote at all; others require that the ballot choice stays unrecorded. New Mexico, Louisiana, and the semi-open states are common points of disagreement, and some states use different rules for presidential primaries.
The fix is simple: use this list to understand your system, then confirm your dates at your state election office or through vote.gov.
The first step is supporting open primaries for every voter. Next, see how More Choice Voting builds on them.
The 20 fully open primary states in 2026 are Alabama, Arkansas, Georgia, Hawaii, Illinois, Indiana, Michigan, Minnesota, Mississippi, Missouri, Montana, New Mexico, North Dakota, Ohio, South Carolina, Tennessee, Texas, Vermont, Virginia, and Wisconsin. Arizona, Colorado, and Maine are semi-open. Confirm your own rules with your state election office before primary day.
Twenty states have fully open primaries in 2026. Counting semi-open states (3) and nonpartisan single-ballot states (3), 26 states let every registered voter cast a primary ballot without joining a party. Classifications differ between sources, so a count you see elsewhere may be slightly higher or lower depending on how semi-open states are labeled.
The 15 closed primary states in 2026 are Connecticut, Delaware, Florida, Iowa, Kansas, Kentucky, Louisiana, Maryland, Nevada, New Jersey, New York, Oregon, Pennsylvania, South Dakota, and Wyoming. About 66.3 million registered voters live in these states, and more than 18.2 million of them are independents without a primary ballot.
No. New York runs closed primaries, so only voters enrolled in a party may vote in that party's primary. For the June 23, 2026 primary, the enrollment deadline was February 14. About 3,187,610 New Yorkers, roughly 25.4% of the electorate, are registered with no party and receive no primary ballot.
Louisiana is listed as a closed primary state for 2026. The state was long known for a single-ballot, majority-vote system for many offices, and its rules now vary by office. Check the Louisiana Secretary of State for which races use party primaries before you vote.
It varies widely by state. State laws vary. One state requires affiliation 29 days before the primary and another allows changes up to 15 days prior. New York set a February 14 deadline for its June 23, 2026 primary. Check your state election office for your exact date.
Use the searchable 2026 state list on this guide, which shows every state's primary type and links to a detailed state page with registration and turnout data. Then confirm the rules and deadlines with your state election office, since laws change and some states use different rules for presidential primaries.
